Common use of Certificate No Clause in Contracts

Certificate No. 2-A-1-[__] Cut-off Date: October 1, 2002 First Distribution Date: November 25, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 3.500% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 of this Class: CUSIP: 55265K ME 6 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 Mortgage Pass-Through Certificates, Series 2002-7 Class 2-A-1 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bank, National Association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 2-A-1-[__] A-1- Cut-off Date: October July 1, 2002 First Distribution Date: November 25August 26, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 3.500% Initial Principal Balance of this Certificate ("Denomination"): $296,163,000 Initial Certificate Principal Balance of this Certificate Class A-1 Certificates: $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 of this Class296,163,000 Latest Possible Maturity Date: October 25, 2032 CUSIP: 55265K ME 6 MORTGAGE 07384Y EM4 Interest Rate: For each Distribution Date, the lesser of (i) One-Month LIBOR plus, for any Distribution Date (a) on or prior to the Optional Termination Date, 0.33% and (b) thereafter, 0.66% and (ii) the applicable Interest Rate Cap. BEAR STEARNS ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION BACKED SECURITIES TRUST 2002-7 Mortgage Pass2 ▇▇set-Through Backed Certificates, Series 2002-7 Class 2-A-1 2 evidencing a percentage interest in the distributions allocable to the Class of Certificates indicated on the first page of the above-referenced Class this Certificate with respect to a Trust Fund consisting primarily of three pools a pool of conventional conventional, fixed- and adjustable-rate mortgage loans (the "Mortgage Loans") secured by first and second liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor (the "Trust Assets"). The Certificate Principal in respect Balance of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Initial Certificate Principal Balance of this Certificate as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer Seller, the Master Servicers or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor most of the Mortgage Loans Trust Assets are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ Cede & Co. is the registered owner of the Percentage Interest evidenced by this Certificate (obtained by dividing the denomination of this Certificate by the aggregate of the denominations of all Certificates of the same Class) in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans Trust Assets deposited by Mortgage Bear Stearns Asset Securitization TransactionsBacked Securities, Inc. (the "Depositor"). The Trust ▇▇▇▇▇ Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above July 1, 2002 (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc.EMC Mortgage Corporation as seller and master servicer (in its capacity as seller, as transferor (the "TransferorSeller" and in its capacity as master servicer, the "EMC Master Servicer"), Wells Fargo Bank Minnesota, N.A., National Association as master servicer s▇▇▇▇▇er and securities administrator (in its capacity as master servicer, the "Wells Master Servicer"), " and in its capacity as securities adm▇▇▇ ▇achovia Bank▇▇rator, the "Securities Administrator" and Bank One, National Association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on The EMC Master Servicer and the Mortgage Loans in Loan Group 2 pursuant Wells Master Servicer are together referred to as the terms of the Agreement. "Maste▇ ▇▇▇vicers" and individually sometimes referred to as a "Master Servicer." To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Pursuant to the terms of the Agreement, a distribution will be made on the 25th day of each month or, if such 25th day is not a Business Day, the Business Day immediately following (the "Distribution Date"), commencing on the first Distribution Date specified above, to the Person in whose name this Certificate is registered on the applicable Record Date in an amount equal to the product of the Percentage Interest evidenced by this Certificate and the amount required to be distributed to Holders of the Certificates of the Class indicated on the first page of this certificate on such Distribution Date pursuant to Section 5.04 of the Agreement. Distributions on this Certificate shall be made by wire transfer of immediately available funds to the account of the registered Holder hereof at a bank or other entity having appropriate facilities therefor, if such Certificateholder shall have so notified the Trustee in writing at least five Business Days prior to the related Record Date or, if not, by check mailed by first class mail to the address of such Certificateholder appearing in the Certificate Register. The final distribution on each Certificate will be made in like manner, but only upon presentment and surrender of such Certificate at the Corporate Trust Office of the Trustee or such other location specified in the notice to Certificateholders of such final distribution. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless the certificate of authentication hereon has been manually countersigned executed by an authorized signatory officer of the Trustee.. * * *

Certificate No. 2-A-1-[__] 1 Cut-off DateDate : September 1, 2004 First Distribution Date : October 1, 2002 First Distribution Date: November 25, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 3.500% Initial Certificate Principal Balance 2004 Percentage Interest of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 of this Class) : CUSIP100% CUSIP : 55265K ME 6 ISIN : GS MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INCSECURITIES CORP. MASTR ASSET SECURITIZATION TRUST 2002GSAA Home Equity Trust 2004-7 Mortgage Pass8 Asset-Through Backed Certificates, Series 20022004-7 8 Class 2-A-1 P evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal Class. Distributions in respect of this Certificate is are distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the DepositorDepositor the Master Servicer, the Servicer to Securities Administrator or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that [_______________ _________] is the registered owner of the Percentage Interest evidenced by this Certificate (obtained by dividing the denomination of this Certificate by the aggregate of the denominations of all Certificates of the Class to which this Certificate belongs) in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling Master Servicing and Servicing Trust Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate GS Mortgage Securities Inc.Corp., as transferor depositor (the "TransferorDepositor"), Wells Fargo Deutsche Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bank, National AssociationTrust Company, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans ) and custodian, Wells Fargo, N.A., as Master Servicer (in Loan Group 2 pursuant such capacity, to the terms of the Agreement"Master Ser▇▇▇▇▇") and Securities Administrator (in such capacity, to "Securities Administrator") and JPMorgan Chase Bank, as custodian. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. This Certificate does not have a Pass-Through Rate and will be entitled to distributions only to the extent set forth in the Agreement. In addition, any distribution of the proceeds of any remaining assets of the Trust will be made only upon presentment and surrender of this Certificate at the offices designated by the Securities Administrator for such purposes or the office or agency maintained by the Securities Administrator. No transfer of a Certificate of this Class shall be made unless such disposition is exempt from the registration requirements of the Securities Act of 1933, as amended (the "1933 Act"), and any applicable state securities laws or is made in accordance with the 1933 Act and such laws. In the event of any such transfer, the Securities Administrator shall require the transferor to execute a transferor certificate (in substantially the form attached to the Trust Agreement) and deliver either (i) a Rule 144A Letter, in either case substantially in the form attached to the Agreement, or (ii) a written Opinion of Counsel to the Securities Administrator that such transfer may be made pursuant to an exemption, describing the applicable exemption and the basis therefor, from the 1933 Act or is being made pursuant to the 1933 Act, which Opinion of Counsel shall be an expense of the transferor. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned authenticated by an authorized signatory of the Trustee.Securities Administrator. * * *

Certificate No. 29-A-1-[__] Cut-off Date: October 1, 2002 2004 First Distribution Date: November 25, 2002 2004 Last Scheduled Distribution Date: December October 25, 2032 2024 Pass-Through Rate: 3.5005.25% Initial Certificate Principal Balance of this Certificate $[______[ ] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 25,404,000 of this Class: CUSIP: 55265K ME 576434 XF 6 ISIN: US576434XF68 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION ALTERNATIVE LOAN TRUST 20022004-7 11 Mortgage Pass-Through Certificates, Series 20022004-7 11 Class 29-A-1 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer Servicer, the Trust Administrator, the Trustee or the Trustee Custodians referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that [_______________ ] is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank MinnesotaBank, N.A.National Association, as master servicer (in such cap▇▇▇▇▇, the "Servicer"), ▇▇▇ ▇achovia Banktrust administrator (in such capacity, the "Trust Administrator") and a custodian, U.S. Bank National Association, as a custodian and as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the applicable Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the TrusteeTrust Administrator.

Certificate No. 21-A-1-A-5-[__] Cut-off Date: October 1, 2002 First Distribution Date: November 25, 2002 Last Scheduled Distribution Date: December November 25, 2032 2017 Pass-Through Rate: 3.5005.500% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 1,800,000 of this Class: CUSIP: 55265K ME 6 MD 8 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 Mortgage Pass-Through Certificates, Series 2002-7 Class 21-A-1 A-5 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bank, National Association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 1 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 21-A-1-[__] Cut-off Date: October 1, 2002 2004 First Distribution Date: November 25, 2002 2004 Last Scheduled Distribution Date: December October 25, 2032 2034 Pass-Through Rate: 3.500% Variable in accordance with the Agreement Initial Certificate Principal Balance of this Certificate $[______[ ] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 70,640,000 of this Class: CUSIP: 55265K ME 6 576434 WV 2 ISIN: US576434WV28 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION ALTERNATIVE LOAN TRUST 20022004-7 11 Mortgage Pass-Through Certificates, Series 20022004-7 11 Class 21-A-1 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer Servicer, the Trust Administrator, the Trustee or the Trustee Custodians referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that [_______________ ] is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank MinnesotaBank, N.A.National Association, as master servicer (in such cap▇▇▇▇▇, the "Servicer"), ▇▇▇ ▇achovia Banktrust administrator (in such capacity, the "Trust Administrator") and a custodian, U.S. Bank National Association, as a custodian and as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the applicable Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the TrusteeTrust Administrator.

Certificate No. 2-A-1-[__] R-1 Cut-off DateDate : October August 1, 2002 2004 First Distribution Date: November September 25, 2002 Last Scheduled 2004 Distribution Date: December 25, 2032 Pass-Through Rate: 3.500% Initial Certificate Principal Balance Date Percentage Interest of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 of this Class) : CUSIP100% CUSIP : 55265K ME 6 36242D EE 9 ISIN : US36242DEE94 GS MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INCSECURITIES CORP. MASTR ASSET SECURITIZATION TRUST 2002GSAA Home Equity Trust 2004-7 Mortgage PassAsset-Through Backed Certificates, Series 20022004-7 Class 2-A-1 R evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal Class. Distributions in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the This Class R Certificate Principal has no Certificate Balance at any time may be less than the Certificate Principal Balance as set forth hereinand is not entitled to distributions in respect of principal or interest. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the DepositorDepositor the Master Servicer, the Servicer Securities Administrator or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that [_______________ _______] is the registered owner of the Percentage Interest evidenced by this Certificate in certain specified above of any monthly distributions with respect due to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created Class R Certificates pursuant to a Pooling Master Servicing and Servicing Trust Agreement dated as of the Cut-off Off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate between GS Mortgage Securities Inc.Corp., as transferor depositor (the "TransferorDepositor"), Wells Fargo Deutsche Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bank, National AssociationTrust Company, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on ) and custodian, Wells Fargo Bank, N.A., as Master Servicer (in such capacity, the Mortgage Loans "Mast▇▇ ▇▇rvicer") and securities administrator (in Loan Group 2 pursuant to such capacity, the terms of the Agreement"Securities Administrator) and JPMorgan Chase Bank, as custodian. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Any distribution of the proceeds of any remaining assets of the Trust Fund will be made only upon presentment and surrender of this Class R Certificate at the offices designated by the Trustee for such purposes or the office or agency maintained by the Securities Administrator in New York, New York. No transfer of a Class R Certificate shall be made unless the Securities Administrator shall have received a representation letter from the transferee of such Certificate, acceptable to and in form and substance satisfactory to the Trustee, to the effect that such transferee is not an employee benefit plan or arrangement subject to Section 406 of ERISA, a plan or arrangement subject to Section 4975 of the Code or a plan subject to Similar Law, or a person acting on behalf of any such plan or arrangement nor using the assets of any such plan or arrangement to effect such transfer, which representation letter shall not be an expense of the Securities Administrator or the Trust Fund. In the event that such representation is violated, or any attempt is made to transfer to a plan or arrangement subject to Section 406 of ERISA or a plan subject to Section 4975 of the Code or a plan subject to Similar Law, or a person acting on behalf of any such plan or arrangement or using the assets of any such plan or arrangement, such attempted transfer or acquisition shall be void and of no effect. Each Holder of this Class R Certificate shall be deemed by the acceptance or acquisition an Ownership Interest in this Class R Certificate to have agreed to be bound by the following provisions, and the rights of each Person acquiring any Ownership Interest in this Class R Certificate are expressly subject to the following provisions: (i) each Person holding or acquiring any Ownership Interest in this Class R Certificate shall be a Permitted Transferee and shall promptly notify the Securities Administrator of any change or impending change in its status as a Permitted Transferee, (ii) no Ownership Interest in this Class R Certificate may be registered on the Closing Date or thereafter transferred, and the Securities Administrator shall not register the Transfer of this Certificate unless, in addition to the certificates required to be delivered to the Securities Administrator under Section 5.02(b) of the Agreement, the Securities Administrator shall have been furnished with a Transfer Affidavit of the initial owner or the proposed transferee in the form attached as Exhibit G to the Agreement, (iii) each Person holding or acquiring any Ownership Interest in this Class R Certificate shall agree (A) to obtain a Transfer Affidavit from any other Person to whom such Person attempts to Transfer its Ownership Interest this Class R Certificate, (B) to obtain a Transfer Affidavit from any Person for whom such Person is acting as nominee, trustee or agent in connection with any Transfer of this Class R Certificate, (C) not to cause income with respect to the Class R Certificate to be attributable to a foreign permanent establishment or fixed base, within the meaning of an applicable income tax treaty, of such Person or any other U.S. Person and (D) not to Transfer the Ownership Interest in this Class R Certificate or to cause the Transfer of the Ownership Interest in this Class R Certificate to any other Person if it has actual knowledge that such Person is not a Permitted Transferee and (iv) any attempted or purported Transfer of the Ownership Interest in this Class R Certificate in violation of the provisions herein shall be absolutely null and void and shall vest no rights in the purported Transferee. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned authenticated by an authorized signatory of the TrusteeSecurities Administrator.

Certificate No. 2-A-1-A-6-[__] Cut-off Date: October 1, 2002 First Distribution Date: November 25, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 3.5006.000% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 7,600,000 of this Class: CUSIP: 55265K ME 6 MK 2 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 Mortgage Pass-Through Certificates, Series 2002-7 Class 2-A-1 A-6 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bank, National Association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 2-A-1-A-9-[__] Cut-off Date: October 1, 2002 First Distribution Date: November 25, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 3.5006.000% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 50,500,000 of this Class: CUSIP: 55265K ME MN 6 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 Mortgage Pass-Through Certificates, Series 2002-7 Class 2-A-1 A-9 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bank, National Association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 21-A-1-[__] Cut-off Date: October 1, 2002 First Distribution Date: November 25, 2002 Last Scheduled Distribution Date: December November 25, 2032 2017 Pass-Through Rate: 3.5005.500% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 352,108,667 of this Class: CUSIP: 55265K ME 6 LZ 0 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 Mortgage Pass-Through Certificates, Series 2002-7 Class 21-A-1 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bank, National Association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 1 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 21-A-1-A-2-[__] Cut-off Date: October 1, 2002 First Distribution Date: November 25, 2002 Last Scheduled Distribution Date: December November 25, 2032 2017 Pass-Through Rate: 3.500% Variable in accordance with the Agreement Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 8,333,333 of this Class: CUSIP: 55265K ME 6 MA 4 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 Mortgage Pass-Through Certificates, Series 2002-7 Class 21-A-1 A-2 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bank, National Association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 1 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 2-A-1-A-11-[__] Cut-off Date: October 1, 2002 First Distribution Date: November 25, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 3.5006.000% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 13,121,000 of this Class: CUSIP: 55265K ME 6 MQ 9 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 Mortgage Pass-Through Certificates, Series 2002-7 Class 2-A-1 A-11 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bank, National Association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 2-A-1-[__] Cut-off DateDate : October With respect to any Mortgage Loan, the later of (i) the date of origination of such Mortgage Loan or (ii) July 1, 2002 2000 First Distribution DateDate : November August 25, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 3.500% 2000 Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial ) : $79,000,000.00 Original Class Certificate Principal Balances of all Certificates $99,624,000 Balance of this ClassClass : CUSIP$79,000,000.00 Percentage Interest : 55265K ME 6 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 Mortgage 100.00% Pass-Through Rate : Variable CUSIP : 68389F __ _ Class : A Assumed Maturity Date : September 2030 Option One Mortgage Loan Trust 2000-3 Asset-Backed Certificates, Series 20022000-7 3 Class 2-A-1 A evidencing a percentage interest the Percentage Interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a the Trust Fund consisting primarily of three pools of conventional first lien, adjustable rate mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc.OPTION ONE MORTGAGE ACCEPTANCE CORPORATION, as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance of this Class A Certificate at any time may be less than the Initial Certificate Principal Balance as set forth on the face hereof, as described herein. This Class A Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer Master Servicer, or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ Cede & Co. is the registered owner of the Percentage Interest evidenced by this Class A Certificate (obtained by dividing the Denomination of this Class A Certificate by the Original Class Certificate Principal Balance) in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Option One Mortgage Asset Securitization Transactions, Inc. Acceptance Corporation (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above July 1, 2000 (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc.Option One Mortgage Corporation, as transferor master servicer (the "TransferorMaster Servicer"), and Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), a ▇▇▇ ▇achovia Bank, National Association▇▇nal banking association, as trustee Trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Class A Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Class A Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Class A Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Class A Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 2-A-1-[__] Cut-off DateDate : October May 1, 2002 2001 First Distribution DateDate : November June 25, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 3.500% 2001 Initial Certificate Principal Balance Notional Amount of this Certificate $[______] ("Denomination"): ) : Initial Certificate Principal Balances Class Notional Amount of all Certificates $99,624,000 of this ClassClass : CUSIPPercentage Interest : 55265K ME 6 CUSIP : Pass-Through Rate : Maturity Date : CREDIT SUISSE FIRST BOSTON MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INCSECURITIES CORP. MASTR ASSET SECURITIZATION TRUST 2002CSFB ABS Trust Series 2001-7 HE12 CSFB Mortgage Pass-Through Certificates, Series 20022001-7 HE12 Class 2A-A-1 IO evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools a pool of fixed rate and adjustable rate conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties properties. Credit Suisse First Boston Mortgage Asset Securitization Transactions, Inc.Securities Corp., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Seller, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ CEDE & CO. is the registered owner of the Percentage Interest evidenced by this Certificate (obtained by dividing the denomination of this Certificate by the aggregate of the denominations of all Certificates of the Class to which this Certificate belongs) in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Credit Suisse First Boston Mortgage Asset Securitization Transactions, Inc. Securities Corp. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities DLJ Mortgage Capital, Inc., as transferor seller (the in such capacity, "TransferorSeller"), Wells Fargo Bank Minnesota, N.A.Calmco Servicing L.P., as master servicer (the in such capacity, "Servicer"), ▇▇▇ ▇achovia Bank, ) and U.S. Bank National Association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 25-A-1-A-11-[__] Cut-off Date: October August 1, 2002 First Distribution Date: November September 25, 2002 Last Scheduled Distribution Date: December September 25, 2032 Pass-Through Rate: 3.500% Variable in accordance with the Agreement Initial Certificate Principal Balance of this Certificate $[__________] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 15,781,250 of this Class: CUSIP: 55265K ME 6 HQ 5 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 5 Mortgage Pass-Through Certificates, Series 2002-7 5 Class 25-A-1 A-11 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three five pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bankank One, National AssociationN.A., as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 5 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 2A-2-A-1-[__] 1 Cut-off Date: October December 1, 2002 2001 First Distribution Date: November January 25, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 3.5006.50% Initial Certificate Principal Balance of this Certificate $[______] 34,171,000 ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 34,171,000 of this Class: CUSIP: 55265K ME 6 269243 AB 7 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION E*TRADE BANK MORTGAGE-BACKED SECURITIES TRUST 20022001-7 2 Mortgage Pass-Through Certificates, Series 20022001-7 2 Class 2-A-1 A-2 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools a pool of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate (obtained by dividing the Denomination of this Certificate by the aggregate initial Class Principal Balances of all Certificates of the Class to which this Certificate belongs) in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota▇▇▇▇▇sota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia and JPMorgan Chase Bank, National Association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 2-A-1-[__] Cut-off DateDate : October 1, 2002 First Distribution DateDate : November 25, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 3.500% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): ) : $ Initial Certificate Principal Balances of all Certificates $99,624,000 of this ClassClass : CUSIP$ CUSIP : 55265K ME 6 MORTGAGE ASSET SECURITIZATION TRANSACTIONSIndyMac ABS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 Inc. Mortgage Pass-Through Certificates, Series 2002-7 199 - - --- Class 2-A-1 ( ) evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools a pool of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization TransactionsIndyMac ABS, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Seller, the Master Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered regis -------------------------------- tered owner of the Percentage Interest evidenced by this Certificate (obtained by dividing the denomination of this Certificate by the aggregate Initial Certificate Balances of all Certificates of the Class to which this Certificate belongs) in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization TransactionsIndyMac ABS, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc.___________________________, as transferor seller (in such capacity, the "TransferorSeller"), Wells Fargo Bank Minnesota, N.A., ) and as master servicer (in such capacity, the "Master Servicer"), ▇▇▇ ▇achovia Bank, National Associationand ___________________, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.. * * *

Certificate No. 2-A-1-A-15-[__] Cut-off Date: October 1, 2002 First Distribution Date: November 25, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 3.5006.000% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 1,000,000 of this Class: CUSIP: 55265K ME 6 MU 0 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 Mortgage Pass-Through Certificates, Series 2002-7 Class 2-A-1 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bank, National Association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 26-A-1-[__] Cut-off Date: October September 1, 2002 First Distribution Date: November October 25, 2002 Last Scheduled Distribution Date: December October 25, 2032 Pass-Through Rate: 3.5006.500% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 35,000,000 of this Class: CUSIP: 55265K ME 6 KQ 1 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 6 Mortgage Pass-Through Certificates, Series 2002-7 Class 2-A-1 6 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three seven pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bankank One, National AssociationN.A., as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 6 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 27-A-1-[__] Cut-off Date: October September 1, 2002 First Distribution Date: November October 25, 2002 Last Scheduled Distribution Date: December October 25, 2032 Pass-Through Rate: 3.5004.000% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 67,866,000 of this Class: CUSIP: 55265K ME 6 KR 9 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 6 Mortgage Pass-Through Certificates, Series 2002-7 Class 2-A-1 6 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three seven pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bankank One, National AssociationN.A., as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 7 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 2-A-1-[__] Cut-off DateDate : October May 1, 2002 First Distribution DateDate : November June 25, 2002 Last Scheduled Distribution DateInitial Notional Amount of this Certificate Denomination : December 25, 2032 Initial Class Notional Amount of all Certificates of this Class : Percentage Interest : CUSIP : Pass-Through RateRate : 3.500% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 of this ClassMaturity Date : CUSIP: 55265K ME 6 CREDIT SUISSE FIRST BOSTON MORTGAGE ASSET SECURITIZATION TRANSACTIONSSECURITIES CORP. Credit Suisse First Boston Mortgage Securities Corp., INC. MASTR ASSET SECURITIZATION TRUST 2002CSFB Mortgage-7 Mortgage Backed Pass-Through Certificates, Series 2002-7 18 Class 2I-A-1 X evidencing a percentage interest 100% Percentage Interest in the distributions allocable to the Class I-X Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools a pool of fixed rate conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties properties. Credit Suisse First Boston Mortgage Asset Securitization Transactions, Inc.Securities Corp., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer Sellers, the Master Servicer, the Servicers, the Special Servicer, the Trustee or the Trustee Trust Administrator referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that [_______________ __________________________], is the registered owner of the Percentage Interest evidenced by this Certificate (obtained by dividing the denomination of this Certificate by the aggregate of the denominations of all Certificates of the Class to which this Certificate belongs) in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Credit Suisse First Boston Mortgage Asset Securitization Transactions, Inc. Securities Corp. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities DLJ Mortgage Capital, Inc., as transferor seller (in such capacity, the "TransferorSeller"), Wells Fargo Bank Minnesota, N.A.Chase Manhattan Mortgage Corporation, as master servicer (in such capacity, the "Master Servicer"), GreenPoint Mortgage Funding, Inc., as a seller (in such capacity, a "Seller"), and as a servicer (in such capacity, a "Servicer"), ▇▇▇ ▇achovia BankWashington Mutual Mortgage Securities Corp., as a seller (in such capacity, a "Seller"), and as a servicer (in such capacity, a "Servicer"), Olympus Servicing, L.P., as a servicer (in such capacity, a "Servicer") and the special servicer (in such capacity, the "Special Servicer"), Bank One, National Association, as trustee (the "Trustee") and JPMorgan Chase Bank, as trust administrator (the "Trust Administrator"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. No transfer of this Certificate shall be made unless such transfer is made pursuant to an effective registration statement under the Securities Act and any applicable state securities laws or is exempt from the registration requirements under said Act and such laws. In the event that a transfer is to be made in reliance upon an exemption from the Securities Act and such laws, in order to assure compliance with the Securities Act and such laws, the Certificateholder desiring to effect such transfer and such Certificateholder's prospective transferee shall each certify to the Trust Administrator in writing the facts surrounding the transfer and (i) deliver a letter in substantially the form of either Exhibit M or Exhibit N-1 or Exhibit N-2 to the Agreement or (ii) there shall be delivered to the Trust Administrator at the expense of the transferor an Opinion of Counsel that such transfer may be made pursuant to an exemption from the Securities Act. In the event that such a transfer is to be made within three years from the date of the initial issuance of Certificates pursuant hereto, there shall also be delivered (except in the case of a transfer pursuant to Rule 144A of the Securities Act) to the Trustee and the Trust Administrator an Opinion of Counsel that such transfer may be made pursuant to an exemption from the Securities Act. The Holder hereof desiring to effect such transfer shall, and does hereby agree to, indemnify the Trustee, the Trust Administrator and the Depositor against any liability that may result if the transfer is not so exempt or is not made in accordance with such federal and state laws. Pursuant to Section 6.02(f) of the Agreement, no transfer of this Certificate shall be made unless the Trustee and the Trust Administrator shall have received either (i) a representation letter from the transferee of such Certificate, acceptable to and in form and substance satisfactory to the Trust Administrator, to the effect that such transferee is not an employee benefit plan subject to Section 406 of ERISA or Section 4975 of the Code, or a person acting on behalf of any such plan or arrangement or using the assets of any such plan or arrangement to effect such transfer, which representation letter shall not be an expense of the Trustee, the Trust Administrator or the Trust Fund, (ii) if the purchaser is an insurance company and the Certificate has been the subject of an ERISA-Qualifying Underwriting, a representation that the purchaser is an insurance company which is purchasing such Certificates with funds contained in an "insurance company general account" (as such term is defined in Section V(e) of Prohibited Transaction Class Exemption 95-60 ("PTCE 95-60")) and that the purchase and holding of such Certificates are covered under Sections I and III of PTCE 95-60 or (iii) in the case of any such Certificate presented for registration in the name of an employee benefit plan subject to ERISA, or Section 4975 of the Code (or comparable provisions of any subsequent enactments), or a trustee of any such plan or any other person acting on behalf of any such plan or arrangement, or using such plan's or arrangement's assets, an Opinion of Counsel satisfactory to the Trust Administrator to the effect that the purchase or holding of such Certificate will not result in the assets of the Trust Fund being deemed to be "plan assets" and subject to the prohibited transaction provisions of ERISA and the Code and will not subject the Depositor, the Trustee, the Trust Administrator, the Master Servicer, the Servicers or the Special Servicer to any obligation in addition to those undertaken in this Agreement, which Opinion of Counsel shall not be an expense of the Trustee, the Trust Administrator or the Trust Fund. In the event the representations referred to in the preceding sentence are not furnished, such representation shall be deemed to have been made to the trustee by the transferee's acceptance of this certificate, or by any beneficial owner who purchases an interest in this certificate in book-entry form. In the event that a representation is violated, or any attempt to transfer this certificate to a plan or person acting on behalf of a plan or using a plan's assets is attempted without the delivery to the trustee of the opinion of counsel described above, the attempted transfer or acquisition of this certificate shall be void and of no effect. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the TrusteeTrust Administrator.

Certificate No. 23-A-1-[__] Cut-off Date: October 1, 2002 First Distribution Date: November 25, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 3.5005.500% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 67,168,000 of this Class: CUSIP: 55265K ME 6 MV 8 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 Mortgage Pass-Through Certificates, Series 2002-7 Class 23-A-1 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bank, National Association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 3 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 21-A-1-[__] Cut-off Date: October September 1, 2002 First Distribution Date: November October 25, 2002 Last Scheduled Distribution Date: December October 25, 2032 2017 Pass-Through Rate: 3.5005.750% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 108,000,000 of this Class: CUSIP: 55265K ME 6 JX 8 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 6 Mortgage Pass-Through Certificates, Series 2002-7 6 Class 21-A-1 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three seven pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bankank One, National AssociationN.A., as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 1 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 25-A-1-[__] Cut-off Date: October September 1, 2002 First Distribution Date: November October 25, 2002 Last Scheduled Distribution Date: December October 25, 2032 2017 Pass-Through Rate: 3.5006.000% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 76,020,000 of this Class: CUSIP: 55265K ME 6 KP 3 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 6 Mortgage Pass-Through Certificates, Series 2002-7 Class 2-A-1 6 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three seven pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bankank One, National AssociationN.A., as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 5 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 23-A-1-[__] Cut-off Date: October August 1, 2002 First Distribution Date: November September 25, 2002 Last Scheduled Distribution Date: December September 25, 2032 2017 Pass-Through Rate: 3.5006.000% Initial Certificate Principal Balance of this Certificate $[__________] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 233,970,000 of this Class: CUSIP: 55265K ME 6 GY 9 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 5 Mortgage Pass-Through Certificates, Series 2002-7 5 Class 23-A-1 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three five pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bankank One, National AssociationN.A., as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 3 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 2-A-1-[__] Cut-off Date: October April 1, 2002 2004 First Distribution Date: November May 25, 2002 2004 Last Scheduled Distribution Date: December May 25, 2032 2019 Pass-Through Rate: 3.5005.00% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): $[ ] Initial Certificate Principal Balances of all Certificates $99,624,000 of this Class: $75,053,000 CUSIP: 55265K ME 6 57643M BP 8 ISIN: US57643MBP86 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 20022004-7 5 Mortgage Pass-Through Certificates, Series 20022004-7 Class 2-A-1 5 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer Master Servicer, the Trust Administrator, the Trustee or the Trustee Custodians referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that [_______________ ] is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank MinnesotaBank, N.A., as master servicer (in such capacity, the "ServicerMast▇▇ ▇▇rvicer"), ▇▇▇ ▇achovia trust administrator (in such capacity, the "Trust Administrator") and a custodian, U.S. Bank National Association, as a custodian ("U.S. Bank"), and Wachovia Bank, National Association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the applicable Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the TrusteeTrust Administrator.

Certificate No. 2-A-1-[__] Cut-off Date: October September 1, 2002 2001 First Distribution Date: November October 25, 2002 Last Scheduled Distribution Date: December 25, 2032 2001 Pass-Through Rate: 3.500% Floating in accordance with the Agreement Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): $ Initial Certificate Principal Balances of all Certificates $99,624,000 of this Class: $212,957,000 CUSIP: 55265K ME 6 576433 AA 4 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION ADJUSTABLE RATE MORTGAGES TRUST 20022001-7 1 Mortgage Pass-Through Certificates, Series 20022001-7 1 Class 2-A-1 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools a pool of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate (obtained by dividing the Denomination of this Certificate by the aggregate initial Class Principal Balances of all Certificates of the Class to which this Certificate belongs) in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities W▇▇▇▇ Fargo Home Mortgage, Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master originator and servicer (the "Servicer"), W▇▇▇▇ ▇achovia Fargo Bank Minnesota, N.A., as trust administrator (the "Trust Administrator"), and The Chase Manhattan Bank, National Association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 25-A-1-[__] Cut-off Date: October May 1, 2002 2004 First Distribution Date: November June 25, 2002 2004 Last Scheduled Distribution Date: December June 25, 2032 2019 Pass-Through Rate: 3.5004.75% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): $[ ] Initial Certificate Principal Balances of all Certificates $99,624,000 of this Class: $26,000,000 CUSIP: 55265K ME 6 576434 RK 2 ISIN: US576434RK28 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION ALTERNATIVE LOAN TRUST 20022004-7 5 Mortgage Pass-Through Certificates, Series 20022004-7 Class 2-A-1 5 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer Servicer, the Trust Administrator, the Trustee or the Trustee Custodians referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that [_______________ ] is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank MinnesotaBank, N.A., as master servicer (in such capacity, the "ServicerServ▇▇▇▇"), ▇▇▇ ▇achovia trust administrator (in such capacity, the "Trust Administrator") and a custodian, U.S. Bank National Association, as a custodian ("U.S. Bank"), and Wachovia Bank, National Association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the applicable Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the TrusteeTrust Administrator.

Certificate No. 2-A-1-[__] 1 Cut-off DateDate : October August 1, 2002 2004 First Distribution DateDate : November September 25, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 3.500% Initial Certificate Principal Balance 2004 Percentage Interest of this Certificate $[______] ("Denomination"): Initial Certificate ) : 100% Principal Balances of all Certificates Balance : $99,624,000 of this Class100 CUSIP : CUSIP: 55265K ME 6 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, N/A ▇▇▇▇▇▇ ▇▇▇▇▇▇▇ ABS CAPITAL I INC. MASTR ASSET SECURITIZATION TRUST 2002CDC Mortgage Capital Trust 2004-7 HE3 Mortgage Pass-Through Certificates, Series 20022004-7 HE3 Class 2-A-1 P evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal Class. Distributions in respect of this Certificate is are distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Unaffiliated Seller, any Originator, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ ____, is the registered owner of the Percentage Interest evidenced by this Certificate (obtained by dividing the denomination of this Certificate by the aggregate of the denominations of all Certificates of the Class to which this Certificate belongs) in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities ▇▇▇▇▇▇ ▇▇▇▇▇▇▇ ABS Capital I Inc., as transferor depositor (the "TransferorDepositor"), Wells Fargo Bank Minnesota, N.A.Countrywide Home Loans Servicing LP, as master servicer (the "Servicer"), ▇▇▇ ▇achovia CDC Mortgage Capital Inc., as unaffiliated seller (the "Unaffiliated Seller"), Deutsche Bank National Trust Company, as custodian, and JPMorgan Chase Bank, National Association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. This Certificate does not have a Pass-Through Rate and will be entitled to distributions only to the extent set forth in the Agreement. In addition, any distribution of the proceeds of any remaining assets of the Trust will be made only upon presentment and surrender of this Certificate at the offices designated by the Trustee for such purposes, or such other location specified in the notice to Certificateholders of such final distribution. No transfer of a Certificate of this Class shall be made unless such disposition is exempt from the registration requirements of the Securities Act of 1933, as amended (the "1933 Act"), and any applicable state securities laws or is made in accordance with the 1933 Act and such laws. In the event of any such transfer, the Trustee shall require the transferor to execute a transferor certificate (in substantially the form attached to the Agreement) and deliver either (i) a Rule 144A Letter, in either case substantially in the form attached to the Agreement, or (ii) a written Opinion of Counsel to the Trustee that such transfer may be made pursuant to an exemption, describing the applicable exemption and the basis therefor, from the 1933 Act or is being made pursuant to the 1933 Act, which Opinion of Counsel shall be an expense of the transferor. Except as provided in the Agreement, no transfer of a Certificate of this Class shall be made unless the Trustee shall have received a representation letter from the transferee of this Certificate, acceptable to and in form and substance satisfactory to the Trustee, to the effect that such transferee is not a Plan, and is not acting on behalf of any Plan or using the assets of any Plan to effect such transfer. Any purported transfer of a Certificate of this Class in violation of the transfer restrictions set forth in the Agreement shall be void and of no effect. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned authenticated by an authorized signatory of the Trustee.. ***

Certificate No. 25-A-1-A-16-[__] Cut-off Date: October August 1, 2002 First Distribution Date: November September 25, 2002 Last Scheduled Distribution Date: December September 25, 2032 Pass-Through Rate: 3.5006.250% Initial Certificate Principal Balance of this Certificate $[__________] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 2,772,000 of this Class: CUSIP: 55265K ME 6 HV 4 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 5 Mortgage Pass-Through Certificates, Series 2002-7 5 Class 25-A-1 A-16 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three five pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bankank One, National AssociationN.A., as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 5 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 2A-1-A-1-[__] 1 Cut-off Date: October December 1, 2002 2001 First Distribution Date: November January 25, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 3.5006.50% Initial Certificate Principal Balance of this Certificate $[______] 432,197,000 ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 432,197,000 of this Class: CUSIP: 55265K ME 6 269243 AA 9 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION E*TRADE BANK MORTGAGE-BACKED SECURITIES TRUST 20022001-7 2 Mortgage Pass-Through Certificates, Series 20022001-7 2 Class 2-A-1 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools a pool of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate (obtained by dividing the Denomination of this Certificate by the aggregate initial Class Principal Balances of all Certificates of the Class to which this Certificate belongs) in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota▇▇▇▇▇sota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia and JPMorgan Chase Bank, National Association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 27-A-1-A-17-[__] Cut-off Date: October September 1, 2002 First Distribution Date: November October 25, 2002 Last Scheduled Distribution Date: December October 25, 2032 Pass-Through Rate: 3.500% Variable in accordance with the Agreement Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 5,407,500 of this Class: CUSIP: 55265K ME 6 LH 0 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 6 Mortgage Pass-Through Certificates, Series 2002-7 Class 2-A-1 6 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three seven pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bankank One, National AssociationN.A., as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 7 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 21-A-1-A-6-[__] Cut-off Date: October April 1, 2002 2004 First Distribution Date: November May 25, 2002 2004 Last Scheduled Distribution Date: December May 25, 2032 2034 Pass-Through Rate: 3.5005.25% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): $[ ] Initial Certificate Principal Balances of all Certificates $99,624,000 of this Class: $2,000,000 CUSIP: 55265K ME 6 57643M BN 3 ISIN: US57643MBN39 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 20022004-7 5 Mortgage Pass-Through Certificates, Series 20022004-7 5 Class 21-A-1 A-6 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer Master Servicer, the Trust Administrator, the Trustee or the Trustee Custodians referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that [_______________ ] is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank MinnesotaBank, N.A., as master servicer (in such capacity, the "ServicerMast▇▇ ▇▇rvicer"), ▇▇▇ ▇achovia trust administrator (in such capacity, the "Trust Administrator") and a custodian, U.S. Bank National Association, as a custodian ("U.S. Bank"), and Wachovia Bank, National Association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the applicable Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the TrusteeTrust Administrator.

Certificate No. 2-A-1-[__] Cut-off DateDate : October 1, 2002 First Distribution Date: November 25, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 3.500% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): ) : $ Initial Certificate Principal Balances of all Certificates $99,624,000 of this ClassClass : CUSIP$ Pass-Through Rate : 55265K ME 6 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INCCUSIP : C-1 ▇▇▇ ▇▇▇▇▇▇ ▇▇▇IDENTIAL FUNDING CORPORATION. MASTR ASSET SECURITIZATION TRUST 2002-7 Mortgage Pass-Through Certificates, Series 2002-7 Class 2-A-1 200 - evidencing a percentage interest in the distributions allocable to the Class A-R Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools a pool of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc.MELLON RESIDENTIAL FUNDING CORPORATION, as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Seller, the Master Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that ______________ is the registered owner of the Percentage Interest evidenced by this Certificate (obtained by dividing the Denomination of this Certificate by the aggregate Initial Certificate Balances of all Certificates of the Class to which this Certificate belongs) in certain monthly distributions with respect to a Trust Fund consisting of the Mortgage Loans deposited by Mellon Residential Funding Corporation (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, _________________ as seller (in such capacity, the "Seller") and as master servicer (in such capacity, the "Master Servicer"), and Well▇ ▇▇▇go Bank Minnesota, National Association, as trustee (the "Trustee"). To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Any distribution of the proceeds of any remaining assets of the Trust Fund will be made only upon presentment and surrender of this Class A-R Certificate at the Corporate Trust Office. No transfer of a Class A-R Certificate shall be made unless the Trustee shall have received either (i) a representation letter from the transferee of such Certificate, acceptable to and in form and substance satisfactory to the Trustee, to the effect that such transferee is not an employee benefit plan subject to Section 406 of ERISA or Section 4975 of the Code, nor a person acting on behalf of any such plan, which representation letter shall not be an expense of the Trustee or the Master Servicer, (ii) if the purchaser is an insurance company, a representation letter that the purchaser is an insurance company which is purchasing such Certificates with funds contained in an "insurance company general account" (as such term is defined in Section V(e) of Prohibited Transaction Class Exemption 95-60 ("PTCE 95-60")) or (iii) in the case of any such Class A-R Certificate presented for registration in the name of an employee benefit plan subject to ERISA, or Section 4975 of the Code (or comparable provisions of any subsequent enactments), or a trustee of any such plan or any other person acting on behalf of any such plan, an Opinion of Counsel satisfactory to the Trustee and the Master Servicer to the effect that the purchase or holding of such Class A-R Certificate will not result in a prohibited transaction and will not subject the Trustee or the Master Servicer to any obligation in addition to those undertaken in this Agreement, which Opinion of Counsel shall not be an expense of the Trustee or the Master Servicer. Notwithstanding anything else to the contrary herein, any purported transfer of a Class A-R Certificate to or on behalf of an employee benefit plan subject to ERISA or to the Code without the opinion of counsel satisfactory to the Trustee as described above shall be void and of no effect. Each Holder of this Class A-R Certificate will be deemed to have agreed to be bound by the restrictions of the Agreement, including but not limited to the restrictions that (i) each person holding or acquiring any Ownership Interest in this Class A-R Certificate must be a Permitted Transferee, (ii) no Ownership Interest in this Class A-R Certificate may be transferred without delivery to the Trustee of (a) a transfer affidavit of the proposed transferee and (b) a transfer certificate of the transferor, each of such documents to be in the form described in the Agreement, (iii) each person holding or acquiring any Ownership Interest in this Class A-R Certificate must agree to require a transfer affidavit and to deliver a transfer certificate to the Trustee as required pursuant to the Agreement, (iv) each person holding or acquiring an Ownership Interest in this Class A-R Certificate must agree not to transfer an Ownership Interest in this Class A-R Certificate if it has actual knowledge that the proposed transferee is not a Permitted Transferee and (v) any attempted or purported transfer of any Ownership Interest in this Class A-R Certificate in violation of such restrictions will be absolutely null and void and will vest no rights in the purported transferee. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee. * * * C-3 129 IN WITNESS WHEREOF, the Trustee has caused this Certificate to be duly executed. Dated: ____________, 20__ WELL▇ ▇▇▇GO BANK MINNESOTA, NATIONAL ASSOCIATION, as Trustee By _______________________________________ Countersigned: By _______________________________ Authorized Signatory of WELL▇ ▇▇▇GO BANK MINNESOTA, NATIONAL ASSOCIATION, as Trustee EXHIBIT D [FORM OF NOTIONAL AMOUNT CERTIFICATE] [SOLELY FOR U.S. FEDERAL INCOME TAX PURPOSES, THIS CERTIFICATE IS A "REGULAR INTEREST" IN A "REAL ESTATE MORTGAGE INVESTMENT CONDUIT," AS THOSE TERMS ARE DEFINED, RESPECTIVELY, IN SECTIONS 860G AND 860D OF THE INTERNAL REVENUE CODE OF 1986, AS AMENDED (THE "CODE").] THIS CERTIFICATE HAS NO PRINCIPAL BALANCE AND IS NOT ENTITLED TO ANY DISTRIBUTIONS IN RESPECT OF PRINCIPAL. [THE FOLLOWING INFORMATION IS PROVIDED SOLELY FOR THE PURPOSE OF APPLYING THE U.S. FEDERAL INCOME TAX ORIGINAL ISSUE DISCOUNT ("OID") RULES UNDER THE CODE TO THIS CERTIFICATE. THE ISSUE DATE OF THIS CERTIFICATE IS __________, 200_. THE INITIAL PER ANNUM RATE OF INTEREST ON THIS CERTIFICATE IS ________%. ASSUMING THAT THE MORTGAGE LOANS PREPAY AT AN ASSUMED RATE OF PREPAYMENT OF __________% PER ANNUM (THE "PREPAYMENT ASSUMPTION"), THIS CERTIFICATE HAS BEEN ISSUED WITH $_______ OF OID ON THE INITIAL POOL STATED PRINCIPAL BALANCE; THE ANNUAL YIELD TO MATURITY OF THIS CERTIFICATE FOR PURPOSES OF COMPUTING THE ACCRUAL OF OID IS APPROXIMATELY _____% (COMPOUNDED MONTHLY); THE AMOUNT OF OID ALLOCABLE TO THE SHORT FIRST ACCRUAL PERIOD IS $________ ON THE INITIAL POOL STATED PRINCIPAL BALANCE; AND THE METHOD USED TO CALCULATE THE ANNUAL YIELD TO MATURITY AND THE AMOUNT OF OID ALLOCABLE TO THE SHORT FIRST ACCRUAL PERIOD IS THE EXACT METHOD AS DEFINED IN PROPOSED TREASURY REGULATIONS. NO REPRESENTATION IS MADE THAT THE MORTGAGE LOANS WILL PREPAY AT A RATE BASED ON THE PREPAYMENT ASSUMPTION OR AT ANY OTHER RATE. THE ACTUAL YIELD TO MATURITY MAY DIFFER FROM THAT SET FORTH ABOVE, AND THE ACCRUAL OF OID WILL BE ADJUSTED, IN ACCORDANCE WITH SECTION 1272(a)(6) OF THE CODE, TO TAKE INTO ACCOUNT EVENTS WHICH HAVE OCCURRED DURING ANY ACCRUAL PERIOD. THE PREPAYMENT ASSUMPTION IS INTENDED TO BE THE PREPAYMENT ASSUMPTION REFERRED TO IN SECTION 1272(a)(6)(B)(iii) OF THE CODE.] Certificate No. : Cut-off Date : First Distribution Date : Initial Notional Amount of this Certificate ("Denomination") : Initial Notional Amount of all Certificates of this Class : Pass-Through Rate : CUSIP : D-1 ▇▇▇ ▇▇▇▇▇▇ ▇▇▇IDENTIAL FUNDING CORPORATION Mortgage Pass-Through Certificates, Series 200 - Class [ ] evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of a pool of conventional loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties MELLON RESIDENTIAL FUNDING CORPORATION, as Depositor This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Seller, the Master Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that ___________________ is the registered owner of the Percentage Interest evidenced by this Certificate specified above in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. Mellon Residential Funding Corporation (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc._______________ as seller (in such capacity, as transferor (the "TransferorSeller"), Wells Fargo Bank Minnesota, N.A., ) and as master servicer (in such capacity, the "Master Servicer"), and Well▇ ▇▇▇ ▇achovia Bankgo Bank Minnesota, National Association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.. * * *

Certificate No. 23-A-1-A-2-[__] Cut-off Date: October 1, 2002 First Distribution Date: November 25, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 3.5005.500% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 10,000,000 of this Class: CUSIP: 55265K ME MW 6 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 Mortgage Pass-Through Certificates, Series 2002-7 Class 23-A-1 A-2 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bank, National Association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 3 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 25-A-1-[__] Cut-off Date: October August 1, 2002 First Distribution Date: November September 25, 2002 Last Scheduled Distribution Date: December September 25, 2032 Pass-Through Rate: 3.5004.500% Initial Certificate Principal Balance of this Certificate $[__________] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 64,962,563 of this Class: CUSIP: 55265K ME 6 HE 2 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 5 Mortgage Pass-Through Certificates, Series 2002-7 5 Class 25-A-1 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three five pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bankank One, National AssociationN.A., as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 5 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 27-A-1-A-14-[__] Cut-off Date: October September 1, 2002 First Distribution Date: November October 25, 2002 Last Scheduled Distribution Date: December October 25, 2032 Pass-Through Rate: 3.500% Variable in accordance with the Agreement Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 7,384,000 of this Class: CUSIP: 55265K ME 6 LE 7 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 6 Mortgage Pass-Through Certificates, Series 2002-7 Class 2-A-1 6 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three seven pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bankank One, National AssociationN.A., as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 7 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 2-A-1-[__] : 1 Cut-off DateDate : October With respect to any Mortgage Loan, May 1, 2002 2004 First Distribution DateDate : November June 25, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 3.500% 2004 Initial Certificate Principal Balance of this Certificate ("Denomination") : $[_______] ("Denomination"): Initial Original Class Certificate Principal Balances of all Certificates $99,624,000 Balance of this ClassClass : CUSIP$[_______] Percentage Interest : 55265K ME 6 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 Mortgage [____] Pass-Through Rate : Variable CUSIP : [____] Class : A-1 Assumed Maturity Date : June, 2034 Long Beach Mortgage Loan Trust 2004-2 Asset-Backed Certificates, Series 20022004-7 2 Class 2-A-1 evidencing a percentage interest the Percentage Interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a the Trust Fund consisting primarily of three pools of conventional first lien, fixed rate and adjustable rate mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc.LONG BEACH SECURITIES CORP., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance of this Class A-1 Certificate at any time may be less than the Initial Certificate Principal Balance as set forth on the face hereof, as described herein. This Class A-1 Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Master Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ Cede & Co. is the registered owner of the Percentage Interest evidenced by this Class A-1 Certificate (obtained by dividing the Denomination of this Class A-1 Certificate by the Original Class Certificate Principal Balance) in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. Long Beach Securities Corp. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above May 1, 2004 (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A.Long Beach Mortgage Company, as master servicer (the "Master Servicer"), ▇▇▇ ▇achovia Bank, ) and Deutsche Bank National AssociationTrust Company, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Class A-1 Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Class A-1 Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Class A-1 Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Class A-1 Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 2-A-1-[__] Cut-off Date: October August 1, 2002 First Distribution Date: November September 25, 2002 Last Scheduled Distribution Date: December September 25, 2032 2017 Pass-Through Rate: 3.5006.000% Initial Certificate Principal Balance of this Certificate $[__________] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 71,350,000 of this Class: CUSIP: 55265K ME 6 GX 1 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 5 Mortgage Pass-Through Certificates, Series 2002-7 5 Class 2-A-1 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three five pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bankank One, National AssociationN.A., as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 23-A-1-[__] Cut-off DateDate of Pooling and Servicing Agreement: October As of November 1, 2002 2004 First Distribution Date: November 25December 21, 2002 2004 Last Scheduled Distribution Date: December 25November 21, 2032 2034 Pass-Through Rate: 3.500% Floating in accordance with the Agreement Initial Certificate Principal Balance of this Certificate $[_______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 of this Class: $314,447,000 CUSIP: 55265K ME 6 576433 UF1 ISIN: US576433UF13 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION ADJUSTABLE RATE MORTGAGES TRUST 20022004-7 13 Mortgage Pass-Through Certificates, Series 20022004-7 Class 2-A-1 13 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer Master Servicer, the Trust Administrator, the Trustee or the Trustee custodian referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank MinnesotaBank, N.A.National Association, as master servicer (in such cap▇▇▇▇▇, the "Master Servicer"), ▇▇▇ ▇achovia Banktrust administrator (in such capacity, the "Trust Administrator") and custodian, and Wachovia Bank National Association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the applicable Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the TrusteeTrust Administrator.

Certificate No. 25-A-1-A-6-[__] Cut-off Date: October August 1, 2002 First Distribution Date: November September 25, 2002 Last Scheduled Distribution Date: December September 25, 2032 Pass-Through Rate: 3.5006.250% Initial Certificate Principal Balance of this Certificate $[__________] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 909,000 of this Class: CUSIP: 55265K ME 6 HK 8 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 5 Mortgage Pass-Through Certificates, Series 2002-7 5 Class 25-A-1 A-6 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three five pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bankank One, National AssociationN.A., as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 5 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 27-A-1-A-6-[__] Cut-off Date: October September 1, 2002 First Distribution Date: November October 25, 2002 Last Scheduled Distribution Date: December October 25, 2032 Pass-Through Rate: 3.5006.250% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 7,150,000 of this Class: CUSIP: 55265K ME 6 KW 8 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 6 Mortgage Pass-Through Certificates, Series 2002-7 Class 2-A-1 6 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three seven pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bankank One, National AssociationN.A., as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 7 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 2A-3-A-1-[__] 1 Cut-off Date: October December 1, 2002 2001 First Distribution Date: November January 25, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 3.5006.50% Initial Certificate Principal Balance of this Certificate $[______] 107,665,000 ("Denomination"): Initial Certificate Principal Balances Balance of all Certificates of $99,624,000 of 107,665,000 this Class: CUSIP: 55265K ME 6 269243 AC 5 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION E*TRADE BANK MORTGAGE-BACKED SECURITIES TRUST 20022001-7 2 Mortgage Pass-Through Certificates, Series 20022001-7 2 Class 2-A-1 A-3 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools a pool of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate (obtained by dividing the Denomination of this Certificate by the aggregate initial Class Principal Balances of all Certificates of the Class to which this Certificate belongs) in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota▇▇▇▇▇sota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia and JPMorgan Chase Bank, National Association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 27-A-1-A-16-[__] Cut-off Date: October September 1, 2002 First Distribution Date: November October 25, 2002 Last Scheduled Distribution Date: December October 25, 2032 Pass-Through Rate: 3.500% Variable in accordance with the Agreement Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 11,928,500 of this Class: CUSIP: 55265K ME 6 LG 2 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 6 Mortgage Pass-Through Certificates, Series 2002-7 Class 2-A-1 6 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three seven pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bankank One, National AssociationN.A., as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 7 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 25-A-1-A-27-[__] Cut-off Date: October August 1, 2002 First Distribution Date: November September 25, 2002 Last Scheduled Distribution Date: December September 25, 2032 Pass-Through Rate: 3.5006.250% Initial Certificate Principal Balance of this Certificate $[__________] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 52,000,000 of this Class: CUSIP: 55265K ME 6 JG 5 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 5 Mortgage Pass-Through Certificates, Series 2002-7 5 Class 25-A-1 A-27 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three five pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bankank One, National AssociationN.A., as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 5 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 23-A-1-[__] Cut-off Date: October September 1, 2002 First Distribution Date: November October 25, 2002 Last Scheduled Distribution Date: December October 25, 2032 Pass-Through Rate: 3.5006.250% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 144,950,000 of this Class: CUSIP: 55265K ME KA 6 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 6 Mortgage Pass-Through Certificates, Series 2002-7 Class 2-A-1 6 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three seven pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bankank One, National AssociationN.A., as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 3 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 25-A-1-A-10-[__] Cut-off Date: October August 1, 2002 First Distribution Date: November September 25, 2002 Last Scheduled Distribution Date: December September 25, 2032 Pass-Through Rate: 3.500% Variable in accordance with the Agreement Initial Certificate Principal Balance of this Certificate $[__________] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 2,153,222 of this Class: CUSIP: 55265K ME 6 HP 7 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 5 Mortgage Pass-Through Certificates, Series 2002-7 5 Class 25-A-1 A-10 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three five pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bankank One, National AssociationN.A., as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 5 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 23-A-1-[__] Cut-off Date: October 1, 2002 First Distribution Date: November 25, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 3.5005.500% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 67,168,000 of this Class: CUSIP: 55265K ME 6 MV 8 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 Mortgage Pass-Through Certificates, Series 2002-7 Class 2-A-1 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bank, National Association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 3 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 25-A-1-[__] Cut-off Date: October April 1, 2002 2004 First Distribution Date: November May 25, 2002 2004 Last Scheduled Distribution Date: December April 25, 2032 2019 Pass-Through Rate: 3.5005.50% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): $[ ] Initial Certificate Principal Balances of all Certificates $99,624,000 of this Class: $44,310,000 CUSIP: 55265K ME 6 576434 QB 3 ISIN: US576434QB38 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION ALTERNATIVE LOAN TRUST 20022004-7 4 Mortgage Pass-Through Certificates, Series 20022004-7 4 Class 25-A-1 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer Servicer, the Trust Administrator, the Trustee or the Trustee Custodians referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that [_______________ ] is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank MinnesotaBank, N.A., as master servicer (in such capacity, the "ServicerServ▇▇▇▇"), ▇▇▇ ▇achovia trust administrator (in such capacity, the "Trust Administrator") and a custodian, U.S. Bank National Association, as a custodian ("U.S. Bank"), and Wachovia Bank, National Association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the applicable Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the TrusteeTrust Administrator.

Certificate No. 2M-[__]-__ Date of Pooling and Servicing Agreement: January 1, 2006 Adjustable Pass-A-1-[__] Through Rate Cut-off Date: October January 1, 2002 2006 First Distribution Date: November 25January 20, 2002 Last Scheduled Distribution Date2006 Aggregate Initial Certificate Principal Balance of the Class M-[_] Certificates: December 25, 2032 Pass-Through Rate$--------------------------- Master Servicer: 3.500% Initial Certificate Principal Balance of this Certificate Residential Funding Corporation Class M-[_] Certificate: $[--------------------------- Final Scheduled Distribution Date: ______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 of this Class: CUSIP: 55265K ME 6 ____ __, 20__ HOME EQUITY MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002ASSET-7 Mortgage PassBACKED PASS-Through Certificates, Series 2002THROUGH CERTIFICATES SERIES 2006-7 Class 2-A-1 EMX1 evidencing a percentage interest in the distributions allocable to the Class M-[_] Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools a pool of conventional fixed and adjustable interest rate, first and junior lien mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this sold by RESIDENTIAL ASSET SECURITIES CORPORATION This Certificate is distributable monthly as set forth herein. Accordinglypayable solely from the assets of the Trust Fund, and does not represent an obligation of or interest in Residential Asset Securities Corporation, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation ofMaster Servicer, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or GMAC Mortgage Group, Inc. or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans underlying mortgage loans are guaranteed or insured by any governmental agency or instrumentalityinstrumentality or by Residential Asset Securities Corporation, the Master Servicer, the Trustee or GMAC Mortgage Group, Inc. or any of their affiliates. None of the Depositor, the Master Servicer, GMAC Mortgage Group, Inc. or any of their affiliates will have any obligation with respect to any certificate or other obligation secured by or payable from payments on the Certificates. This certifies that _______________ CEDE & CO. is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a the Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactionsan interest in a pool of fixed and adjustable interest rate, Inc. first and junior lien mortgage loans on one- to four- family residential properties (the "Mortgage Loans"), sold by Residential Asset Securities Corporation (hereinafter called the "Depositor"," which term includes any successor entity under the Agreement referred to below). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Master Servicer and U.S. Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bank, National Association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 pursuant to the terms , a summary of certain of the Agreementpertinent provisions of which is set forth hereafter. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made Pursuant to the further provisions terms of the Agreement, a distribution will be made on the 25th day of each month or, if such 25th day is not a Business Day, the Business Day immediately following (the "Distribution Date"), commencing as described in the Agreement, to the Person in whose name this Certificate is registered at the close of business on the Business Day immediately preceding that Distribution Date (the "Record Date"), from the related Available Distribution Amount in an amount equal to the product of the Percentage Interest evidenced by this Certificate and the amount of interest and principal, if any, required to be distributed to Holders of Class M-[_] Certificates on such Distribution Date. Distributions on this Certificate will be made either by the Master Servicer acting on behalf of the Trustee or by a Paying Agent appointed by the Trustee in immediately available funds (by wire transfer or otherwise) for the account of the Person entitled thereto if such Person shall have so notified the Master Servicer or such Paying Agent, or by check mailed to the address of the Person entitled thereto, as such name and address shall appear on the Certificate Register. Notwithstanding the above, the final distribution on this Certificate will be made after due notice of the pendency of such distribution and only upon presentation and surrender of, this Certificate at the office or agency appointed by the Trustee for that purpose in St. Paul, Minnesota. The Initial Ce▇▇▇▇icate Principal Balance of this Certificate is set forth above. The Certificate Principal Balance hereof will be reduced to the extent of distributions allocable to principal and any Realized Losses allocable hereto. Any Transferee of this Certificate will be deemed to have made representations relating to the permissibility of such transfer under ERISA and Section 4975 of the Code, as described in Section 5.02(e)(ii) of the Agreement. In addition, any purported Certificate Owner whose acquisition or holding of this Certificate (or interest therein) was effected in violation of the restrictions in Section 5.02(e)(ii) of the Agreement shall indemnify and hold harmless the Depositor, the Trustee, the Master Servicer, any Subservicer, any underwriter and the Trust Fund from and against any and all liabilities, claims, costs or expenses incurred by such parties as a result of such acquisition or holding. This Certificate is one of a duly authorized issue of Certificates issued in several Classes designated as Home Equity Mortgage Asset-Backed Pass-Through Certificates of the Series specified hereon (herein collectively called the "Certificates"). The Certificates are limited in right of payment to certain collections and recoveries respecting the Mortgage Loans, all as more specifically set forth herein and in the Agreement. In the event Master Servicer funds are advanced with respect to any Mortgage Loan, such advance is reimbursable to the Master Servicer, to the extent provided in the Agreement, from related recoveries on such Mortgage Loan or from other cash that would have been distributable to Certificateholders. As provided in the reverse hereofAgreement, which further provisions withdrawals from the Custodial Account and/or the Certificate Account created for the benefit of Certificateholders may be made by the Master Servicer from time to time for purposes other than distributions to Certificateholders, such purposes including without limitation reimbursement to the Depositor and the Master Servicer of advances made, or certain expenses incurred, by either of them. The Agreement permits, with certain exceptions therein provided, the amendment of the Agreement and the modification of the rights and obligations of the Depositor, the Master Servicer and the Trustee and the rights of the Certificateholders under the Agreement from time to time by the Depositor, the Master Servicer and the Trustee with the consent of the Holders of Certificates evidencing in the aggregate not less than 66% of the Percentage Interests of each Class of Certificates affected thereby. Any such consent by the Holder of this Certificate shall be conclusive and binding on such Holder and upon all future holders of this Certificate and of any Certificate issued upon the transfer hereof or in exchange herefor or in lieu hereof whether or not notation of such consent is made upon the Certificate. The Agreement also permits the amendment thereof in certain circumstances without the consent of the Holders of any of the Certificates and, in certain additional circumstances, without the consent of the Holders of certain Classes of Certificates. As provided in the Agreement and subject to certain limitations therein set forth, the transfer of this Certificate is registrable in the Certificate Register upon surrender of this Certificate for registration of transfer at the offices or agencies appointed by the Trustee in St. Paul, Minnesota, duly endorsed ▇▇, or accompanied by an assignment in the form below or other written instrument of transfer in form satisfactory to the Trustee and the Certificate Registrar duly executed by the Holder hereof or such Holder's attorney duly authorized in writing, and there upon one or more new Certificates of authorized denominations evidencing the same Class and aggregate Percentage Interest will be issued to the designated transferee or transferees. The Certificates are issuable only as registered Certificates without coupons in Classes and in denominations specified in the Agreement. As provided in the Agreement and subject to certain limitations therein set forth, Certificates are exchangeable for new Certificates of authorized denominations evidencing the same Class and aggregate Percentage Interest, as requested by the Holder surrendering the same. No service charge will be made for any such registration of transfer or exchange, but the Trustee may require payment of a sum sufficient to cover any tax or other governmental charge payable in connection therewith. The Depositor, the Master Servicer, the Trustee, and the Certificate Registrar and any agent of the Depositor, the Master Servicer, the Trustee or the Certificate Registrar may treat the Person in whose name this Certificate is registered as the owner hereof for all purposes have purposes, and none of the same effect as if set forth at this placeDepositor, the Master Servicer, the Trustee or any such agent shall be affected by notice to the contrary. This Certificate shall be governed by and construed in accordance with the laws of the State of New York. The obligations created by the Agreement in respect of the Certificates and the Trust Fund created thereby shall terminate upon the payment to Certificateholders of all amounts held by or on behalf of the Trustee and required to be paid to them pursuant to the Agreement following the earlier of (i) the maturity or other liquidation of the last Mortgage Loan subject thereto or the disposition of all property acquired upon foreclosure or deed in lieu of foreclosure of any Mortgage Loan, and (ii) the purchase by the Master Servicer from the Trust Fund of all remaining Mortgage Loans and all property acquired in respect of such Mortgage Loans or the Certificates, in either case thereby effecting early retirement of the Certificates. The Agreement permits, but does not require the Master Servicer (i) to purchase, at a price determined as provided in the Agreement, all remaining Mortgage Loans and all property acquired in respect of any Mortgage Loan or (ii) to purchase in whole, but not in part, all of the Certificates from the Holders thereof, provided, that any such option may only be exercised if the Stated Principal Balance before giving effect to the distributions to be made on such Distribution Date of the Mortgage Loans, as of the Distribution Date upon which the proceeds of any such purchase are distributed is less than ten percent of the Cut-off Date Balance. Unless the certificate of authentication hereon has been executed by the Certificate Registrar, by manual signature, this Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trusteepurpose.

Certificate No. 2-A-1-[__] Cut-off DateDate : October 1, 2002 First Distribution DateDate : November 25, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 3.500% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): ) : $ Initial Certificate Principal Balances of all Certificates $99,624,000 of this ClassClass : CUSIP$ CUSIP : 55265K ME 6 MORTGAGE ASSET SECURITIZATION TRANSACTIONSCWMBS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 Mortgage Pass-Through Certificates, Series 2002-7 199_ Class 2-A-1 ( ) evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools a pool of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization TransactionsCWMBS, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Seller, the Master Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered regis- -------------------------------- tered owner of the Percentage Interest evidenced by this Certificate (obtained by dividing the denomination of this Certificate by the aggregate Initial Certificate Balances of all Certificates of the Class to which this Certificate belongs) in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization TransactionsCWMBS, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Countrywide Home Loans, Inc., as transferor seller (in such capacity, the "TransferorSeller"), Wells Fargo Bank Minnesota, N.A., ) and as master servicer (in such capacity, the "Master Servicer"), ▇▇▇ ▇achovia Bank, National Associationand The Bank of New York, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee. * * * IN WITNESS WHEREOF, the Trustee has caused this Certificate to be duly executed. Dated: ____________, 19__ THE BANK OF NEW YORK, as Trustee By ______________________ Countersigned: By ___________________________ Authorized Signatory of THE BANK OF NEW YORK, as Trustee EXHIBIT B (FORM OF SUBORDINATED CERTIFICATE) (UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION ("DTC"), TO ISSUER OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE, OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE, OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.) SOLELY FOR U.S. FEDERAL INCOME TAX PURPOSES, THIS CERTIFICATE IS A "REGULAR INTEREST" IN A "REAL ESTATE MORTGAGE INVESTMENT CONDUIT," AS THOSE TERMS ARE DEFINED, RESPECTIVELY, IN SECTIONS 860G AND 860D OF THE INTERNAL REVENUE CODE OF 1986, AS AMENDED (THE "CODE"). THIS CERTIFICATE IS SUBORDINATED IN RIGHT OF PAYMENT TO CERTAIN CERTIFICATES AS DESCRIBED IN THE AGREEMENT REFERRED TO HEREIN. (THE FOLLOWING INFORMATION IS PROVIDED SOLELY FOR THE PURPOSE OF APPLYING THE U.S. FEDERAL INCOME TAX ORIGINAL ISSUE DISCOUNT ("OID") RULES UNDER THE CODE TO THIS CERTIFICATE. THE ISSUE DATE OF THIS CERTIFICATE IS , 199 . THE INITIAL PER ANNUM RATE OF INTEREST ON THIS CERTIFICATE IS %. ASSUMING THAT THE MORTGAGE LOANS PREPAY AT AN ASSUMED RATE OF PREPAYMENT OF % PER ANNUM (THE "PREPAYMENT ASSUMPTION"), THIS CERTIFICATE HAS BEEN ISSUED WITH $ OF OID PER $1,000 OF THE ORIGINAL PRINCIPAL AMOUNT OF THIS CERTIFICATE; THE ANNUAL YIELD TO MATURITY OF THIS CERTIFICATE FOR PURPOSES OF COMPUTING THE ACCRUAL OF OID IS APPROXIMATELY % (COMPOUNDED MONTHLY); THE AMOUNT OF OID ALLOCABLE TO THE SHORT FIRST ACCRUAL PERIOD IS $ PER $1,000 OF THE ORIGINAL PRINCIPAL AMOUNT OF THIS CERTIFICATE COMPUTED USING THE MONTHLY YIELD AND DAILY COMPOUNDING DURING THE SHORT ACCRUAL PERIOD. NO REPRESENTATION IS MADE THAT THE MORTGAGE LOANS WILL PREPAY AT A RATE BASED ON THE PREPAYMENT ASSUMPTION OR AT ANY OTHER RATE. THE ACTUAL YIELD TO MATURITY MAY DIFFER FROM THAT SET FORTH ABOVE, AND THE ACCRUAL OF OID WILL BE ADJUSTED, IN ACCORDANCE WITH SECTION 1272(a)(6) OF THE CODE, TO TAKE INTO ACCOUNT EVENTS WHICH HAVE OCCURRED DURING ANY ACCRUAL PERIOD. THE PREPAYMENT ASSUMPTION IS INTENDED TO BE THE PREPAYMENT ASSUMPTION REFERRED TO IN SECTION 1272(a)(6)(B)(iii) OF THE CODE.) (THIS CERTIFICATE HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "ACT"). ANY RESALE OR TRANSFER OF THIS CERTIFICATE WITHOUT REGISTRATION THEREOF UNDER THE ACT MAY ONLY BE MADE IN A TRANSACTION EXEMPTED FROM THE REGISTRATION REQUIREMENTS OF THE ACT AND IN ACCORDANCE WITH THE PROVISIONS OF THE AGREEMENT REFERRED TO HEREIN.) NEITHER THIS CERTIFICATE NOR ANY INTEREST HEREIN MAY BE TRANSFERRED UNLESS THE TRANSFEREE REPRESENTS TO THE TRUSTEE THAT SUCH TRANSFEREE IS NOT AN EMPLOYEE BENEFIT PLAN SUBJECT TO THE EMPLOYEE RETIREMENT INCOME SECURITY ACT OF 1974, AS AMENDED, OR A PLAN SUBJECT TO SECTION 4975 OF THE CODE, OR DELIVERS TO THE TRUSTEE AN OPINION OF COUNSEL IN ACCORDANCE WITH THE PROVISIONS OF THE AGREEMENT REFERRED TO HEREIN. (SUCH REPRESENTATION SHALL BE DEEMED TO HAVE BEEN MADE TO THE TRUSTEE BY THE TRANSFEREE'S ACCEPTANCE OF A CERTIFICATE OF THIS CLASS AND BY A BENEFICIAL OWNER'S ACCEPTANCE OF ITS INTEREST IN A CERTIFICATE OF THIS CLASS.) NOTWITHSTANDING ANYTHING ELSE TO THE CONTRARY HEREIN, ANY PURPORTED TRANSFER OF THIS CERTIFICATE TO OR ON BEHALF OF AN EMPLOYEE BENEFIT PLAN SUBJECT TO ERISA OR TO THE CODE WITHOUT THE OPINION OF COUNSEL SATISFACTORY TO THE TRUSTEE AS DESCRIBED ABOVE SHALL BE VOID AND OF NO EFFECT. Certificate No. : Cut-off Date : First Distribution Date : Initial Certificate Balance of this Certificate ("Denomination") : $ Initial Certificate Balances of all Certificates of this Class : $ CWMBS, INC. Mortgage Pass-Through Certificates, Series 199 - - --- Class ( ) evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of a pool of conventional loans (the "Mortgage Loans") secured by first liens on one- to four- family residential properties CWMBS, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Balance at any time may be less than the Certificate Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Seller, the Master Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that is the regis- --------------------------------- tered owner of the Percentage Interest evidenced by this Certificate (obtained by dividing the denomination of this Certificate by the aggregate Initial Certificate Balances of all Certificates of the Class to which this Certificate belongs) in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by CWMBS, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, Countrywide Home Loans, Inc., as seller (in such capacity, the "Seller") and as master servicer (in such capacity, the "Master Servicer"), and The Bank of New York, as trustee (the "Trustee"). To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. (No transfer of a Certificate of this Class shall be made unless such transfer is made pursuant to an effective registration statement under the Securities Act and any applicable state securities laws or is exempt from the registration requirements under said Act and such laws. In the event that a transfer is to be made in reliance upon an exemption from the Securities Act and such laws, in order to assure compliance with the Securities Act and such laws, the Certificateholder desiring to effect such transfer and such Certificateholder's prospective transferee shall each certify to the Trustee in writing the facts surrounding the transfer. In the event that such a transfer is to be made within three years from the date of the initial issuance of Certificates pursuant hereto, there shall also be delivered (except in the case of a transfer pursuant to Rule 144A of the Securities Act) to the Trustee an Opinion of Counsel that such transfer may be made pursuant to an exemption from the Securities Act and such state securities laws, which Opinion of Counsel shall not be obtained at the expense of the Trustee, the Seller, the Master Servicer or the Depositor. The Holder hereof desiring to effect such transfer shall, and does hereby agree to, indemnify the Trustee and the Depositor against any liability that may result if the transfer is not so exempt or is not made in accordance with such federal and state laws.) No transfer of a Certificate of this Class shall be made unless the Trustee shall have received either (i) a representation (letter) from the transferee of such Certificate, acceptable to and in form and substance satisfactory to the Trustee, to the effect that such transferee is not an employee benefit plan subject to Section 406 of ERISA or Section 4975 of the Code, nor a person acting on behalf of any such plan, which representation letter shall not be an expense of the Trustee or the Master Servicer, (ii) if the purchaser is an insurance company, a representation that the purchaser is an insurance company which is purchasing such Certificates with funds contained in an "insurance company general account" (as such term is defined in Section V(e) of Prohibited Transaction Class Exemption 95-60 ("PTCE 95- 60")) and that the purchase and holding of such Certificates are covered under PTCE 95-60, or (iii) in the case of any such Certificate presented for registration in the name of an employee benefit plan subject to ERISA or Section 4975 of the Code (or comparable provisions of any subsequent enactments), or a trustee of any such plan or any other person acting on behalf of any such plan, an Opinion of Counsel satisfactory to the Trustee and the Master Servicer to the effect that the purchase or holding of such Certificate will not result in the assets of deemed to be "plan assets" and subject to the prohibited transaction provisions of ERISA and the Code and will not subject the Trustee to any obligation in addition to those undertaken in the Agreement, which Opinion of Counsel shall not be an expense of the Trustee or the Master Servicer. (Such representation shall be deemed to have been made to the Trustee by the Transferee's acceptance of a Certificate of this Class and by a beneficial owner's acceptance of its interest in a Certificate of this Class.) Notwithstanding anything else to the contrary herein, any purported transfer of a Certificate of this Class to or on behalf of an employee benefit plan subject to ERISA or to the Code without the opinion of counsel satisfactory to the Trustee as described above shall be void and of no effect. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee. * * *

Certificate No. 2-A-1-[__] Cut-off Date: October September 1, 2002 First Distribution Date: November October 25, 2002 Last Scheduled Distribution Date: December October 25, 2032 2017 Pass-Through Rate: 3.5005.750% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 227,000,000 of this Class: CUSIP: 55265K ME 6 JZ 3 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 6 Mortgage Pass-Through Certificates, Series 2002-7 Class 2-A-1 6 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three seven pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bankank One, National AssociationN.A., as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 26-A-1-[__] Cut-off Date: October May 1, 2002 2004 First Distribution Date: November June 25, 2002 2004 Last Scheduled Distribution Date: December June 25, 2032 2034 Pass-Through Rate: 3.5007.00% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): $[ ] Initial Certificate Principal Balances of all Certificates $99,624,000 of this Class: $45,000,000 CUSIP: 55265K ME 6 576434 RL 0 ISIN: US576434RL01 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION ALTERNATIVE LOAN TRUST 20022004-7 5 Mortgage Pass-Through Certificates, Series 20022004-7 5 Class 26-A-1 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer Servicer, the Trust Administrator, the Trustee or the Trustee Custodians referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that [_______________ ] is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank MinnesotaBank, N.A., as master servicer (in such capacity, the "ServicerServ▇▇▇▇"), ▇▇▇ ▇achovia trust administrator (in such capacity, the "Trust Administrator") and a custodian, U.S. Bank National Association, as a custodian ("U.S. Bank"), and Wachovia Bank, National Association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the applicable Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the TrusteeTrust Administrator.

Certificate No. 27-A-1-A-13-[__] Cut-off Date: October September 1, 2002 First Distribution Date: November October 25, 2002 Last Scheduled Distribution Date: December October 25, 2032 Pass-Through Rate: 3.5006.250% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 28,000,000 of this Class: CUSIP: 55265K ME 6 LD 9 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 6 Mortgage Pass-Through Certificates, Series 2002-7 Class 2-A-1 6 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three seven pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bankank One, National AssociationN.A., as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 7 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 2A-A-1-[__] LR-1 Cut-off Date: October September 1, 2002 First Distribution Date: November October 25, 2002 Last Scheduled Distribution Date: December Date October 25, 2032 Pass-Through Rate: 3.5007.250% Initial Certificate Principal Balance of this Certificate $[______[ ] ("Denomination"): Initial Certificate Principal Balances of all Certificates of $99,624,000 of 50 this Class: CUSIP: 55265K ME 6 576434 AW 4 ISIN: US576434AW49 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION ALTERNATIVE LOAN TRUST 2002-7 2 Mortgage Pass-Through Certificates, Series 2002-7 Class 2-A-1 2 evidencing a percentage interest in the distributions allocable to the Class A-LR Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three five pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer Servicer, or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced (obtained by dividing the Denomination of this Certificate by the aggregate initial Class Principal Balances of all Certificates of the Class to which this Certificate belongs) in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇) a▇▇ ▇achovia Bank▇nk One, National AssociationN.A., as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Any distribution of the proceeds of any remaining assets of the Trust Fund will be made only upon presentment and surrender of this Class A-LR Certificate at the Corporate Trust Office of the Trustee. No transfer of a Class A-LR Certificate shall be made unless the Trustee shall have received a representation letter from the transferee of such Certificate, acceptable to and in form and substance satisfactory to the Trustee, to the effect that such transferee is not an employee benefit plan subject to Section 406 of ERISA, Section 4975 of the Code or Similar Law, nor a person acting on behalf of any such plan, which representation letter shall not be an expense of the Trustee or the Servicer. Notwithstanding anything else to the contrary herein any purported transfer of a Class A-LR Certificate to or on behalf of an employee benefit plan subject to ERISA, the Code or Similar Law shall be void and of no effect. Each Holder of this Class A-LR Certificate will be deemed to have agreed to be bound by the restrictions of the Agreement, including but not limited to the restrictions that (i) each person holding or acquiring any Ownership Interest in this Class A-LR Certificate must be a Permitted Transferee, (ii) no Ownership Interest in this Class A-LR Certificate may be transferred without delivery to the Trustee of (a) a transfer affidavit of the proposed transferee and (b) a transfer certificate of the transferor, each of such documents to be in the form described in the Agreement, (iii) each person holding or acquiring any Ownership Interest in this Class A-LR Certificate must agree to require a transfer affidavit and to deliver a transfer certificate to the Trustee as required pursuant to the Agreement, (iv) each person holding or acquiring an Ownership Interest in this Class A-LR Certificate must agree not to transfer an Ownership Interest in this Class A-LR Certificate if it has actual knowledge that the proposed transferee is not a Permitted Transferee and (v) any attempted or purported transfer of any Ownership Interest in this Class A-LR Certificate in violation of such restrictions will be absolutely null and void and will vest no rights in the purported transferee. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 23-A-1-A-2-[__] Cut-off Date: October September 1, 2002 First Distribution Date: November October 25, 2002 Last Scheduled Distribution Date: December October 25, 2032 Pass-Through Rate: 3.5006.250% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 1,500,000 of this Class: CUSIP: 55265K ME 6 KB 4 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 6 Mortgage Pass-Through Certificates, Series 2002-7 Class 2-A-1 6 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three seven pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bankank One, National AssociationN.A., as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 3 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 24-A-1-[__] Cut-off Date: October September 1, 2002 First Distribution Date: November October 25, 2002 Last Scheduled Distribution Date: December October 25, 2032 Pass-Through Rate: 3.5006.000% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 20,000,000 of this Class: CUSIP: 55265K ME 6 KD 0 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 6 Mortgage Pass-Through Certificates, Series 2002-7 Class 2-A-1 6 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three seven pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bankank One, National AssociationN.A., as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 4 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 2A-A-1-[__] R-1 Cut-off Date: October June 1, 2002 2003 First Distribution Date: November July 25, 2002 2003 Last Scheduled Distribution Date: December July 25, 2032 2033 Pass-Through Rate: 3.5005.500% Initial Certificate Principal Balance of this Certificate $[______] 100 ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 100 of this Class: CUSIP: 55265K ME 6 ZM 4 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 20022003-7 6 Mortgage Pass-Through Certificates, Series 20022003-7 Class 2-A-1 6 evidencing a percentage interest in the distributions allocable to the Class A-R Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three nine pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer Servicer, or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ UBS Securities LLC is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "ServicerService▇"), ▇▇▇ ▇achovia U.S. Bank National Association, as custodian, and Wachovia Bank, National Association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Any distribution of the proceeds of any remaining assets of the Trust Fund will be made only upon presentment and surrender of this Class A-R Certificate at the Corporate Trust Office of the Trustee. No transfer of a Class A-R Certificate shall be made unless the Trustee shall have received a representation letter from the transferee of such Certificate, acceptable to and in form and substance satisfactory to the Trustee, to the effect that such transferee is not an employee benefit plan subject to Section 406 of ERISA, Section 4975 of the Code or Similar Law, nor a person acting on behalf of any such plan, which representation letter shall not be an expense of the Trustee or the Servicer. Notwithstanding anything else to the contrary herein any purported transfer of a Class A-R Certificate to or on behalf of an employee benefit plan subject to ERISA, the Code or Similar Law shall be void and of no effect. Each Holder of this Class A-R Certificate will be deemed to have agreed to be bound by the restrictions of the Agreement, including but not limited to the restrictions that (i) each person holding or acquiring any Ownership Interest in this Class A-R Certificate must be a Permitted Transferee, (ii) no Ownership Interest in this Class A-R Certificate may be transferred without delivery to the Trustee of (a) a transfer affidavit of the proposed transferee and (b) a transfer certificate of the transferor, each of such documents to be in the form described in the Agreement, (iii) each person holding or acquiring any Ownership Interest in this Class A-R Certificate must agree to require a transfer affidavit and to deliver a transfer certificate to the Trustee as required pursuant to the Agreement, (iv) each person holding or acquiring an Ownership Interest in this Class A-R Certificate must agree not to transfer an Ownership Interest in this Class A-R Certificate if it has actual knowledge that the proposed transferee is not a Permitted Transferee and (v) any attempted or purported transfer of any Ownership Interest in this Class A-R Certificate in violation of such restrictions will be absolutely null and void and will vest no rights in the purported transferee. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 27-A-1-A-8-[__] Cut-off Date: October September 1, 2002 First Distribution Date: November October 25, 2002 Last Scheduled Distribution Date: December October 25, 2032 Pass-Through Rate: 3.5006.250% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 5,000,000 of this Class: CUSIP: 55265K ME 6 KY 4 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 6 Mortgage Pass-Through Certificates, Series 2002-7 Class 2-A-1 6 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three seven pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bankank One, National AssociationN.A., as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 7 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 2-A-1-[__] Cut-off DateDate : October May 1, 2002 2001 First Distribution DateDate : November June 25, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 3.500% 2001 Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): ) : Initial Certificate Principal Balances of all Certificates $99,624,000 of this ClassClass : CUSIPCUSIP : 55265K ME 6 Pass-Through Rate : Maturity Date : CREDIT SUISSE FIRST BOSTON MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INCSECURITIES CORP. MASTR ASSET SECURITIZATION TRUST 2002CSFB ABS Trust Series 2001-7 HE12 CSFB Mortgage Pass-Through Certificates, Series 20022001-7 HE12 Class 2-A-1 A-[o] evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools a pool of fixed rate and adjustable rate conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties properties. Credit Suisse First Boston Mortgage Asset Securitization Transactions, Inc.Securities Corp., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Seller, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ CEDE & CO. is the registered owner of the Percentage Interest evidenced by this Certificate (obtained by dividing the denomination of this Certificate by the aggregate of the denominations of all Certificates of the Class to which this Certificate belongs) in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Credit Suisse First Boston Mortgage Asset Securitization Transactions, Inc. Securities Corp. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities DLJ Mortgage Capital, Inc., as transferor seller (the in such capacity, "TransferorSeller"), Wells Fargo Bank Minnesota, N.A.Calmco Servicing L.P., as master servicer (the in such capacity, "Servicer"), ▇▇▇ ▇achovia Bank, ) and U.S. Bank National Association, Association as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 27-A-1-A-7-[__] Cut-off Date: October September 1, 2002 First Distribution Date: November October 25, 2002 Last Scheduled Distribution Date: December October 25, 2032 Pass-Through Rate: 3.5006.250% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 3,000,000 of this Class: CUSIP: 55265K ME KX 6 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 6 Mortgage Pass-Through Certificates, Series 2002-7 Class 2-A-1 6 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three seven pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bankank One, National AssociationN.A., as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 7 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 24-A-1-[__] Cut-off Date: October May 1, 2002 2004 First Distribution Date: November June 25, 2002 2004 Last Scheduled Distribution Date: December July 25, 2032 2019 Pass-Through Rate: 3.5005.50% Initial Certificate Principal Balance of this Certificate $[_________] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 37,000,000 of this Class: CUSIP: 55265K ME 6 576434 RJ 5 ISIN: US576434RJ54 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION ALTERNATIVE LOAN TRUST 20022004-7 5 Mortgage Pass-Through Certificates, Series 20022004-7 Class 2-A-1 5 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer Servicer, the Trust Administrator, the Trustee or the Trustee Custodians referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that [_______________ ] is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank MinnesotaBank, N.A., as master servicer (in such capacity, the "ServicerServ▇▇▇▇"), ▇▇▇ ▇achovia trust administrator (in such capacity, the "Trust Administrator") and a custodian, U.S. Bank National Association, as a custodian ("U.S. Bank"), and Wachovia Bank, National Association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the applicable Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the TrusteeTrust Administrator.

Certificate No. 2-A-1-[__] R-1 Cut-off DateDate : October August 1, 2002 2004 First Distribution DateDate : November September 25, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 3.500% Initial Certificate Principal Balance 2004 Percentage Interest of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 of this Class) : CUSIP100% CUSIP : 55265K ME 6 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, N/A ▇▇▇▇▇▇ ▇▇▇▇▇▇▇ ABS CAPITAL I INC. MASTR ASSET SECURITIZATION TRUST 2002CDC Mortgage Capital Trust 2004-7 HE3 Mortgage Pass-Through Certificates, Series 20022004-7 HE3 Class 2-A-1 R evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal Class. Distributions in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the This Class R Certificate Principal has no Certificate Balance at any time may be less than the Certificate Principal Balance as set forth hereinand is not entitled to distributions in respect of principal or interest. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Unaffiliated Seller, any Originator, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that ____________________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain specified above of any monthly distributions with respect due to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created Class R Certificates pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities ▇▇▇▇▇▇ ▇▇▇▇▇▇▇ ABS Capital I Inc., as transferor depositor (the "TransferorDepositor"), Wells Fargo Bank Minnesota, N.A.Countrywide Home Loans Servicing LP, as master servicer (the "Servicer"), ▇▇▇ ▇achovia CDC Mortgage Capital Inc., as unaffiliated seller (the "Unaffiliated Seller"), Deutsche Bank National Trust Company, as custodian, and JPMorgan Chase Bank, National Association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Any distribution of the proceeds of any remaining assets of the Trust Fund will be made only upon presentment and surrender of this Class R Certificate at the offices designated by the Trustee for such purposes or such other location specified in the notice to Certificateholders of such final distribution. No transfer of a Class R Certificate shall be made unless the Trustee shall have received a representation letter from the transferee of this Certificate, acceptable to and in form and substance satisfactory to the Trustee, to the effect that such transferee is not a Plan, and is not acting on behalf of any Plan or using the assets of any Plan to effect such transfer. Any purported transfer of a Class R Certificate in violation of the transfer restrictions set forth in the Agreement shall be void and of no effect. Each Holder of this Class R Certificate shall be deemed by the acceptance or acquisition an Ownership Interest in this Class R Certificate to have agreed to be bound by the following provisions, and the rights of each Person acquiring any Ownership Interest in this Class R Certificate are expressly subject to the following provisions: (i) each Person holding or acquiring any Ownership Interest in this Class R Certificate shall be a Permitted Transferee and shall promptly notify the Trustee of any change or impending change in its status as a Permitted Transferee, (ii) no Ownership Interest in this Class R Certificate may be registered on the Closing Date or thereafter transferred, and the Trustee shall not register the Transfer of this Certificate unless, in addition to the certificates required to be delivered to the Trustee under Section 5.02(b) of the Agreement, the Trustee shall have been furnished with a Transfer Affidavit of the initial owner or the proposed transferee in the form attached as Exhibit H to the Agreement, (iii) each Person holding or acquiring any Ownership Interest in this Class R Certificate shall agree (A) to obtain a Transfer Affidavit from any other Person to whom such Person attempts to Transfer its Ownership Interest this Class R Certificate, (B) to obtain a Transfer Affidavit from any Person for whom such Person is acting as nominee, trustee or agent in connection with any Transfer of this Class R Certificate and (C) not to Transfer the Ownership Interest in this Class R Certificate or to cause the Transfer of the Ownership Interest in this Class R Certificate to any other Person if it has actual knowledge that such Person is a Non-Permitted Transferee and (iv) any attempted or purported Transfer of the Ownership Interest in this Class R Certificate in violation of the provisions herein shall be absolutely null and void and shall vest no rights in the purported Transferee. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned authenticated by an authorized signatory of the Trustee.

Certificate No. 27-A-1-A-10-[__] Cut-off Date: October September 1, 2002 First Distribution Date: November October 25, 2002 Last Scheduled Distribution Date: December October 25, 2032 Pass-Through Rate: 3.5006.250% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 1,979,000 of this Class: CUSIP: 55265K ME 6 LA 5 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 6 Mortgage Pass-Through Certificates, Series 2002-7 Class 2-A-1 6 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three seven pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bankank One, National AssociationN.A., as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 7 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 2-A-1-[__1][2] Cut-off DateDate : October May 1, 2002 2001 First Distribution DateDate : November June 25, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 3.500% 2001 Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): ) : $ Initial Certificate Principal Balances of all Certificates $99,624,000 of this ClassClass : CUSIP$ CUSIP : 55265K ME 6 Pass-Through Rate : Maturity Date : CREDIT SUISSE FIRST BOSTON MORTGAGE ASSET SECURITIZATION TRANSACTIONSSECURITIES CORP. Credit Suisse First Boston Mortgage Securities Corp., INC. MASTR ASSET SECURITIZATION TRUST 2002Mortgage-7 Mortgage Backed Pass-Through Certificates, Series 20022001-7 11 Class 2-A-1 AR evidencing a percentage interest in the distributions allocable to the Class AR Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools a pool of adjustable rate conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties properties. Credit Suisse First Boston Mortgage Asset Securitization Transactions, Inc.Securities Corp., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer Sellers, the Servicers, the Trustee or the Trustee Trust Administrator referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ Credit Suisse First Boston Corporation, is the registered owner of the Percentage Interest evidenced by this Certificate (obtained by dividing the denomination of this Certificate by the aggregate of the denominations of all Certificates of the Class to which this Certificate belongs) in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Credit Suisse First Boston Mortgage Asset Securitization Transactions, Inc. Securities Corp. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities DLJ Mortgage Capital, Inc., as transferor a seller (the in such capacity, a "TransferorSeller"), Wells Fargo Bank Minnesota, N.A.Washington Mutual Mortgage Securities Corp., as master a seller (in such capacity, a "Seller") and a servicer (the in such capacity, a "Servicer"), ▇▇▇ ▇achovia BankBank One, National Association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on , The Chase Manhattan Bank, as trust administrator (the Mortgage Loans "Trust Administrator") and Calmco Servicing L.P., as a special servicer (in Loan Group 2 pursuant to the terms of the Agreementsuch capacity, a "Special Servicer"). To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Any distribution of the proceeds of any remaining assets of the Trust Fund will be made only upon presentment and surrender of this Class AR Certificate at the Corporate Trust Office or the office or agency maintained by the Trust Administrator in New York, New York. No transfer of a Class AR Certificate shall be made unless the Trust Administrator shall have received either (i) a representation letter from the transferee of such Certificate, acceptable to and in form and substance satisfactory to the Trust Administrator, to the effect that such transferee is not an employee benefit plan subject to Section 406 of ERISA or Section 4975 of the Code, or a person acting on behalf of any such plan or arrangement or using the assets of any such plan or arrangement to effect such transfer, which representation letter shall not be an expense of the Trustee, the Trust Administrator or the Trust Fund or (ii) if the transferee is an insurance company, a representation that the transferee is an insurance company which is purchasing this certificate with funds contained in an "insurance company general account," as that term is defined in Section V(e) of Prohibited Transaction Class Exemption 95-60, or PTCE 95-60, and that the purchase and holding of this certificate are covered under Sections I and II of PTCE 95-60, or (iii) in the case of any such Class AR Certificate presented for registration in the name of an employee benefit plan subject to ERISA, or Section 4975 of the Code (or comparable provisions of any subsequent enactments), or a trustee of any such plan or any other person acting on behalf of any such plan or arrangement, or using such plan's or arrangement's assets, an Opinion of Counsel satisfactory to the Trust Administrator to the effect that the purchase or holding of such Class AR Certificate will not result in the assets of the Trust Fund being deemed to be "plan assets" and subject to the prohibited transaction provisions of ERISA and the Code and will not subject the Depositor, the Trustee, the Trust Administrator, the Servicers or the Special Servicer to any obligation in addition to those undertaken in this Agreement, which Opinion of Counsel shall not be an expense of the Trustee, the Trust Administrator or the Trust Fund. Notwithstanding anything else to the contrary herein, any purported transfer of a Class AR Certificate to or on behalf of an employee benefit plan subject to ERISA or to the Code without the Opinion of Counsel satisfactory to the Trust Administrator as described above shall be void and of no effect. Each Holder of this Class AR Certificate will be deemed to have agreed to be bound by the restrictions of the Agreement, including but not limited to the restrictions that (i) each person holding or acquiring any Ownership Interest in this Class AR Certificate must be a Permitted Transferee, (ii) no Ownership Interest in this Class AR Certificate may be transferred without delivery to the Trust Administrator of a transfer affidavit of the initial owner or the proposed transferee in the form described in the Agreement, (iii) each person holding or acquiring any Ownership Interest in this Class AR Certificate must agree to require a transfer affidavit from any other person to whom such person attempts to Transfer its Ownership Interest in this Class AR Certificate as required pursuant to the Agreement, (iv) each person holding or acquiring an Ownership Interest in this Class AR Certificate must agree not to transfer an Ownership Interest in this Class AR Certificate if it has actual knowledge that the proposed transferee is not a Permitted Transferee and (v) any attempted or purported transfer of any Ownership Interest in this Class AR Certificate in violation of such restrictions will be absolutely null and void and will vest no rights in the purported transferee. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the TrusteeTrust Administrator.

Certificate No. 24-A-1-[__] Cut-off Date: October August 1, 2002 First Distribution Date: November September 25, 2002 Last Scheduled Distribution Date: December September 25, 2032 Pass-Through Rate: 3.5006.500% Initial Certificate Principal Balance of this Certificate $[__________] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 151,299,000 of this Class: CUSIP: 55265K ME 6 HD 4 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 5 Mortgage Pass-Through Certificates, Series 2002-7 5 Class 24-A-1 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three five pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bankank One, National AssociationN.A., as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 4 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 2-A-1-[__] 1 Cut-off DateDate : October August 1, 2002 2004 First Distribution DateDate : November 25September 27, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 3.500% 2004 Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial ) : $ 22,925,000.00 Original Class Certificate Principal Balances of all Certificates $99,624,000 Balance of this ClassClass : CUSIP$ 22,925,000.00 Percentage Interest : 55265K ME 6 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 Mortgage 100.00% Pass-Through Rate : Variable CUSIP : 317350 BE 5 Class : M-2 Assumed Maturity Date : August 2034 Finance America Mortgage Loan Trust 2004-2 Asset-Backed Certificates, Series 20022004-7 2 Class 2-A-1 M-2 evidencing a percentage interest the Percentage Interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a the Trust Fund consisting primarily of three pools of conventional first lien adjustable rate and fixed rate mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc.FINANCIAL ASSET SECURITIES CORP., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance of this Class M-2 Certificate at any time may be less than the Initial Certificate Principal Balance as set forth on the face hereof, as described herein. This Class M-2 Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer Servicer, or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ Cede & Co. is the registered owner of the Percentage Interest evidenced by this Class M-2 Certificate (obtained by dividing the Denomination of this Class M-2 Certificate by the Original Class Certificate Principal Balance) in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Financial Asset Securitization Transactions, Inc. Securities Corp. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above August 1, 2004 (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc.HomEq Servicing Corporation, as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bankand Deutsche Bank National Trust Company, National Associationa national banking association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Class M-2 Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Class M-2 Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. No transfer of this Certificate to a Plan subject to ERISA or Section 4975 of the Code, any Person acting, directly or indirectly, on behalf of any such Plan or any person using Plan Assets to acquire this Certificate shall be made except in accordance with Section 5.02(d) of the Agreement. Reference is hereby made to the further provisions of this Class M-2 Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Class M-2 Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 2-A-1-[__] 1 Cut-off DateDate : October August 1, 2002 2004 First Distribution DateDate : November 25September 27, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 3.500% 2004 Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial ) : $ 15,594,000.00 Original Class Certificate Principal Balances of all Certificates $99,624,000 Balance of this ClassClass : CUSIP$ 15,594,000.00 Percentage Interest : 55265K ME 6 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 Mortgage 100.00% Pass-Through Rate : Variable CUSIP : 317350 BC 9 Class : II-A3 Assumed Maturity Date : August 2034 Finance America Mortgage Loan Trust 2004-2 Asset-Backed Certificates, Series 20022004-7 2 Class 2II-A-1 A3 evidencing a percentage interest the Percentage Interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a the Trust Fund consisting primarily of three pools of conventional first lien adjustable rate and fixed rate mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc.FINANCIAL ASSET SECURITIES CORP., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance of this Class II-A3 Certificate at any time may be less than the Initial Certificate Principal Balance as set forth on the face hereof, as described herein. This Class II-A3 Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer Servicer, or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ Cede & Co. is the registered owner of the Percentage Interest evidenced by this Class II-A3 Certificate (obtained by dividing the Denomination of this Class II-A3 Certificate by the Original Class Certificate Principal Balance) in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Financial Asset Securitization Transactions, Inc. Securities Corp. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above August 1, 2004 (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc.HomEq Servicing Corporation, as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bankand Deutsche Bank National Trust Company, National Associationa national banking association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Class II-A3 Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Class II-A3 Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Class II-A3 Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Class II-A3 Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 2-A-1-[__] 1 Cut-off DateDate : October August 1, 2002 2004 First Distribution DateDate : November 25September 27, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 3.500% 2004 Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial ) : $ 375,737,000.00 Original Class Certificate Principal Balances of all Certificates $99,624,000 Balance of this ClassClass : CUSIP$ 375,737,000.00 Percentage Interest : 55265K ME 6 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 Mortgage 100.00% Pass-Through Rate : Variable CUSIP : 317350 AZ 9 Class : I-A1 Assumed Maturity Date : August 2034 Finance America Mortgage Loan Trust 2004-2 Asset-Backed Certificates, Series 20022004-7 2 Class 2I-A-1 A1 evidencing a percentage interest the Percentage Interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a the Trust Fund consisting primarily of three pools of conventional first lien adjustable rate and fixed rate mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc.FINANCIAL ASSET SECURITIES CORP., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance of this Class I-A1 Certificate at any time may be less than the Initial Certificate Principal Balance as set forth on the face hereof, as described herein. This Class I-A1 Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer Servicer, or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ Cede & Co. is the registered owner of the Percentage Interest evidenced by this Class I-A1 Certificate (obtained by dividing the Denomination of this Class I-A1 Certificate by the Original Class Certificate Principal Balance) in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Financial Asset Securitization Transactions, Inc. Securities Corp. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above August 1, 2004 (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc.HomEq Servicing Corporation, as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bankand Deutsche Bank National Trust Company, National Associationa national banking association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Class I-A1 Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Class I-A1 Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Class I-A1 Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Class I-A1 Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 2-A-1-[__] A-1 Cut-off Date: October June 1, 2002 2001 First Distribution Date: November July 25, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 3.500% 2001 Initial Principal Balance of this Certificate ("Denomination"): $93,995,000 Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 of this Class: CUSIP: 55265K ME 6 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 Mortgage Pass-Through Certificates, Series 2002-7 Class 2-A-1 A Certificates: $93,995,000 Latest Possible Maturity Date: October 25, 2034 CUSIP: 07384Y AC 0 Interest Rate: Adjustable (the lesser of (i) One-Month LIBOR plus, for any Distribution Date (a) on or prior to the Optional Termination Date, 0.320% and (b) thereafter, 0.640% and (ii) the Class 2-A Rate Cap). BEAR STEARNS ASSET BACKED SECURITIES TRUST 2001-2 ▇▇▇▇▇-▇ACKED CERTIFICATES, SERIES 2001-2 evidencing a percentage interest in the distributions allocable to the Class 2-A Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools a pool of conventional conventional, fixed-rate mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor well as certain BSSP Certificates (the "Trust Assets"). Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance of the Class 2-A Certificates at any time may be less than the Initial Certificate Principal Balance of the Class 2-A Certificates as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer Seller, either Master Servicer, the Securities Administrator or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor most of the Mortgage Loans Trust Assets are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ Cede & Co. is the registered owner of the Percentage Interest evidenced by this Certificate (obtained by dividing the denomination of this Certificate by the aggregate of the denominations of all Class 2-A Certificates) in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans Trust Assets deposited by Mortgage Bear Stearns Asset Securitization TransactionsBacked Securities, Inc. (the "Depositor"). The Trust Fund Trus▇ ▇▇▇▇ was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above June 29, 2001 (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc.EMC Mortgage Corporation as seller and master servicer (in its capacity as seller, as transferor (the "TransferorSeller" and in its capacity as master servicer, the "EMC Master Servicer"), Wells Fargo Bank Minnesota, N.A.National Association, as master servicer (the "Servicer"), servi▇▇▇ ▇achovia Banknd securities administrator (in its capacity as master servicer, National Associationthe "Wells Master Servicer" and in its capacity as securities administ▇▇▇▇▇, the "Securities Administrator") and Bankers Trust Company of California, N.A., as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on The EMC Master Servicer and the Mortgage Loans in Loan Group 2 pursuant Wells Master Servicer are together referred to as the terms of the Agreement. "Master Ser▇▇▇▇▇s" and individually sometimes referred to as a "Master Servicer." To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Pursuant to the terms of the Agreement, a distribution will be made on the 25th day of each month or, if such 25th day is not a Business Day, the Business Day immediately following (the "Distribution Date"), commencing on the first Distribution Date specified above, to the Person in whose name this Certificate is registered on the applicable Record Date in an amount equal to the product of the Percentage Interest evidenced by this Certificate and the amount required to be distributed to Holders of Class 2-A Certificates on such Distribution Date pursuant to Section 5.04 of the Agreement. Distributions on this Certificate shall be made by wire transfer of immediately available funds to the account of the registered Holder hereof at a bank or other entity having appropriate facilities therefor, if such Certificateholder shall have so notified the Securities Administrator in writing at least five Business Days prior to the related Record Date and such Certificateholder shall hold a Percentage Interest aggregating 10% or more of a Class of Regular Certificates or of Certificates with an aggregate Initial Certificate Principal Balance of $1,000,000 or more, or, if not, by check mailed by first class mail to the address of such Certificateholder appearing in the Certificate Register. The final distribution on each Certificate will be made in like manner, but only upon presentment and surrender of such Certificate at the Corporate Trust Office of the Trustee or such other location specified in the notice to Certificateholders of such final distribution. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless the certificate of authentication hereon has been manually countersigned executed by an authorized signatory officer of the Trustee.. * * *

Certificate No. 2-A-1-[__] Cut-off DateDate : October February 1, 2002 First Distribution DateDate : November March 25, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 3.500% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): ) : $ Initial Certificate Principal Balances of all Certificates $99,624,000 of this ClassClass : CUSIP$ CUSIP : 55265K ME 6 Pass-Through Rate : Maturity Date : August 25, 2032 CREDIT SUISSE FIRST BOSTON MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INCACCEPTANCE CORP. MASTR ASSET SECURITIZATION TRUST CSFB ABS Trust Series 2002-7 HE4 CSFB Mortgage Pass-Through Certificates, Series 2002-7 HE4 Class 2-A-1 A-[o] evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools a pool of fixed rate and adjustable rate conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties properties. Credit Suisse First Boston Mortgage Asset Securitization Transactions, Inc.Acceptance Corp., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer Seller, the Servicers, the Trustee or the Trustee Special Servicer referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ CEDE & CO. is the registered owner of the Percentage Interest evidenced by this Certificate (obtained by dividing the denomination of this Certificate by the aggregate of the denominations of all Certificates of the Class to which this Certificate belongs) in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Credit Suisse First Boston Mortgage Asset Securitization Transactions, Inc. Acceptance Corp. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities DLJ Mortgage Capital, Inc., as transferor seller (the in such capacity, "TransferorSeller"), Wells Fargo Bank MinnesotaOlympus Servicing, N.A.L.P., as master a servicer (in such capacity, a "Servicer") and as the special servicer (in such capacity, the "Special Servicer"), Ocwen Federal Bank FSB, as a servicer (in such capacity, a "Servicer"), ▇▇▇ ▇achovia BankFairbanks Capital Corp., as a servicer (in such capacity, a "Servicer") and U.S. Bank National Association, Association as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 2-A-1-[__] Cut-off Date: October December 1, 2002 2001 First Distribution Date: November January 25, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 3.5005.50% Initial Certificate Principal Balance of this Certificate $[________] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 63,614,000 of this Class: CUSIP: 55265K ME 6 BR 9 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 20022001-7 3 Mortgage Pass-Through Certificates, Series 20022001-7 Class 3 CLASS 2-A-1 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three four pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells ▇▇▇▇▇ Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bankand Citibank, National AssociationN.A., as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To , to the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 2-A-1-[__] P-1 Cut-off DateDate : October July 1, 2002 2004 First Distribution DateDate : November August 25, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 3.500% Initial Certificate Principal Balance 2004 Percentage Interest of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 of this Class) : CUSIP: 55265K ME 6 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, 100% MORGAN STANLEY ABS CAPITAL I INC. MASTR ASSET SECURITIZATION TRUST 2002Morgan Stanley ABS Ca▇▇▇▇▇ I ▇▇▇. ▇rust 2004-7 HE5 Mortgage Pass▇▇▇▇-Through Certificates▇h▇▇▇▇▇ ▇ertificates, Series 20022004-7 HE5 Class 2-A-1 P evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal Class. Distributions in respect of this Certificate is are distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer Countrywide, HomEq, Chase, Accredited, NC Capital or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ Deutsche Bank National Trust Company, as NIM Trustee, is the registered owner of the Percentage Interest evidenced by this Certificate (obtained by dividing the denomination of this Certificate by the aggregate of the denominations of all Certificates of the Class to which this Certificate belongs) in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Morgan Stanley ABS Capital I Inc., as transferor depositor (the "TransferorDepositor"), Wells Fargo Bank MinnesotaChas▇, N.A.▇▇▇n▇▇▇▇▇▇▇ Home Loans Servicing LP, as master servicer (the "ServicerCountrywide"), ▇▇▇ ▇achovia BankHomEq Servicing Corporation, as servicer ("HomEq"), Manhattan Mortgage Corporation, as servicer ("Chase"), Accredited Home Lenders, Inc., as a responsible party ("Accredited"), NC Capital Corporation, as a responsible party ("NC Capital") and Deutsche Bank National AssociationTrust Company, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. This Certificate does not have a Pass-Through Rate and will be entitled to distributions only to the extent set forth in the Agreement. In addition, any distribution of the proceeds of any remaining assets of the Trust will be made only upon presentment and surrender of this Certificate at the offices designated by the Trustee for such purposes, or such other location specified in the notice to Certificateholders. No transfer of a Certificate of this Class shall be made unless such disposition is exempt from the registration requirements of the Securities Act of 1933, as amended (the "1933 Act"), and any applicable state securities laws or is made in accordance with the 1933 Act and such laws. In the event of any such transfer, the Trustee shall require the transferor to execute a transferor certificate (in substantially the form attached to the Pooling and Servicing Agreement) and deliver either (i) a Rule 144A Letter, in either case substantially in the form attached to the Agreement, or (ii) a written Opinion of Counsel to the Trustee that such transfer may be made pursuant to an exemption, describing the applicable exemption and the basis therefor, from the 1933 Act or is being made pursuant to the 1933 Act, which Opinion of Counsel shall be an expense of the transferor. No transfer of a Certificate of this Class shall be made unless the Trustee shall have received a representation letter from the transferee of such Certificate, acceptable to and in form and substance satisfactory to the Trustee, to the effect that such transferee is not an employee benefit plan subject to Section 406 of ERISA, Section 4975 of the Code or any materially similar provisions of applicable federal, state or local law ("Similar Law"), or a person acting on behalf of or investing plan assets of any such plan, which representation letter shall not be an expense of the Trustee. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned authenticated by an authorized signatory of the Trustee.

Certificate No. 27-A-1-A-12-[__] Cut-off Date: October September 1, 2002 First Distribution Date: November October 25, 2002 Last Scheduled Distribution Date: December October 25, 2032 Pass-Through Rate: 3.5006.250% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 1,052,000 of this Class: CUSIP: 55265K ME 6 LC 1 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 6 Mortgage Pass-Through Certificates, Series 2002-7 Class 2-A-1 6 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three seven pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bankank One, National AssociationN.A., as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 7 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 21-A-1-[__] Cut-off Date: October April 1, 2002 2004 First Distribution Date: November May 25, 2002 2004 Last Scheduled Distribution Date: December May 25, 2032 2034 Pass-Through Rate: 3.5005.50% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): $[ ] Initial Certificate Principal Balances of all Certificates $99,624,000 of this Class: $63,374,000 CUSIP: 55265K ME 576434 PX 6 ISIN: US576434PX66 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION ALTERNATIVE LOAN TRUST 20022004-7 4 Mortgage Pass-Through Certificates, Series 20022004-7 Class 2-A-1 4 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer Servicer, the Trust Administrator, the Trustee or the Trustee Custodians referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that [_______________ ] is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank MinnesotaBank, N.A., as master servicer (in such capacity, the "ServicerServ▇▇▇▇"), ▇▇▇ ▇achovia trust administrator (in such capacity, the "Trust Administrator") and a custodian, U.S. Bank National Association, as a custodian ("U.S. Bank"), and Wachovia Bank, National Association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the applicable Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the TrusteeTrust Administrator.

Certificate No. 21-A-1-[__] Cut-off Date: October August 1, 2002 2004 First Distribution Date: November September 25, 2002 2004 Last Scheduled Distribution Date: December September 25, 2032 2034 Pass-Through Rate: 3.5006.50% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): $[ ] Initial Certificate Principal Balances of all Certificates $99,624,000 of this Class: $95,000,000 CUSIP: 55265K ME 6 576434 UP 7 ISIN: US576434UP77 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION ALTERNATIVE LOAN TRUST 20022004-7 8 Mortgage Pass-Through Certificates, Series 20022004-7 8 Class 21-A-1 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer Servicer, the Trust Administrator, the Trustee or the Trustee Custodians referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that [_______________ ] is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank MinnesotaBank, N.A., as master servicer (in such capacity, the "ServicerServ▇▇▇▇"), ▇▇▇ ▇achovia Banktrust administrator (in such capacity, the "Trust Administrator") and a custodian, U.S. Bank National Association, as a custodian and as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the applicable Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the TrusteeTrust Administrator.

Certificate No. 2-A-1-[__] Cut-off DateDate : October May 1, 2002 2001 First Distribution DateDate : November June 25, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 3.500% 2001 Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): ) : Initial Certificate Principal Balances of all Certificates $99,624,000 of this ClassClass : CUSIPPercentage Interest : 55265K ME 6 CUSIP : Pass-Through Rate : None Maturity Date : CREDIT SUISSE FIRST BOSTON MORTGAGE ASSET SECURITIZATION TRANSACTIONSSECURITIES CORP. Credit Suisse First Boston Mortgage Securities Corp., INC. MASTR ASSET SECURITIZATION TRUST 2002Mortgage-7 Mortgage Backed Pass-Through Certificates, Series 20022001-7 11 Class 2A-A-1 P evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools a pool of fixed rate conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties properties. Credit Suisse First Boston Mortgage Asset Securitization Transactions, Inc.Securities Corp., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer Sellers, the Servicers, the Trustee or the Trustee Trust Administrator referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ CEDE & CO, is the registered owner of the Percentage Interest evidenced by this Certificate (obtained by dividing the denomination of this Certificate by the aggregate of the denominations of all Certificates of the Class to which this Certificate belongs) in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Credit Suisse First Boston Mortgage Asset Securitization Transactions, Inc. Securities Corp. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities DLJ Mortgage Capital, Inc., as transferor a seller (the in such capacity, a "TransferorSeller"), Wells Fargo Bank Minnesota, N.A.Washington Mutual Mortgage Securities Corp., as master a seller (in such capacity, a "Seller") and a servicer (the in such capacity, a "Servicer"), ▇▇▇ ▇achovia BankBank One, National Association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on , The Chase Manhattan Bank, as trust administrator (the Mortgage Loans "Trust Administrator") and Calmco Servicing L.P., as a special servicer (in Loan Group 2 pursuant to the terms of the Agreement. To such capacity, a "Special Servicer").To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the TrusteeTrust Administrator.

Certificate No. 21-A-1-[__] Cut-off Date: October May 1, 2002 2004 First Distribution Date: November June 25, 2002 2004 Last Scheduled Distribution Date: December June 25, 2032 2034 Pass-Through Rate: 3.5005.50% Initial Certificate Principal Balance of this Certificate $[______[ ] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 28,350,000 of this Class: CUSIP: 55265K ME 6 576434 RF 3 ISIN: US576434RF33 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION ALTERNATIVE LOAN TRUST 20022004-7 5 Mortgage Pass-Through Certificates, Series 20022004-7 5 Class 21-A-1 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer Servicer, the Trust Administrator, the Trustee or the Trustee Custodians referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that [_______________ ] is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank MinnesotaBank, N.A., as master servicer (in such capacity, the "ServicerServ▇▇▇▇"), ▇▇▇ ▇achovia trust administrator (in such capacity, the "Trust Administrator") and a custodian, U.S. Bank National Association, as a custodian ("U.S. Bank"), and Wachovia Bank, National Association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the applicable Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the TrusteeTrust Administrator.

Certificate No. 21-A-1-[__] Cut-off Date: October August 1, 2002 First Distribution Date: November September 25, 2002 Last Scheduled Distribution Date: December September 25, 2032 2017 Pass-Through Rate: 3.5006.000% Initial Certificate Principal Balance of this Certificate $[__________] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 20,000,000 of this Class: CUSIP: 55265K ME 6 GU 7 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 5 Mortgage Pass-Through Certificates, Series 2002-7 5 Class 21-A-1 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three five pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bankank One, National AssociationN.A., as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 1 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 25-A-1-[__] Cut-off Date: October September 1, 2002 First Distribution Date: November October 25, 2002 Last Scheduled Distribution Date: December Date October 25, 2032 2017 Pass-Through Rate: 3.5007.000% Initial Certificate Principal Balance of this Certificate $[______[ ] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 94,589,000 of this Class: CUSIP: 55265K ME 6 576434 BD 5 ISIN: US576434BD58 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION ALTERNATIVE LOAN TRUST 2002-7 2 Mortgage Pass-Through Certificates, Series 2002-7 2 Class 25-A-1 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three five pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bankank One, National AssociationN.A., as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 5 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 2A-A-1-[__] R-1 Cut-off Date: October December 1, 2002 2001 First Distribution Date: November January 25, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 3.5006.50% Initial Certificate Principal Balance of this Certificate $[______] 100 ("Denomination"): Initial Certificate Principal Balances of all Certificates of $99,624,000 of 100 this Class: CUSIP: 55265K ME 6 269243 AE 1 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION E*TRADE BANK MORTGAGE-BACKED SECURITIES TRUST 20022001-7 2 Mortgage Pass-Through Certificates, Series 20022001-7 Class 2-A-1 2 evidencing a percentage interest in the distributions allocable to the Class A-R Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools a pool of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer Servicer, or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced (obtained by dividing the Denomination of this Certificate by the aggregate initial Class Principal Balances of all Certificates of the Class to which this Certificate belongs) in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota▇▇▇▇▇sota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia and JPMorgan Chase Bank, National Association., as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Any distribution of the proceeds of any remaining assets of the Trust Fund will be made only upon presentment and surrender of this Class A-R Certificate at the Corporate Trust Office of the Trustee. No transfer of a Class A-R Certificate shall be made unless the Trustee shall have received a representation letter from the transferee of such Certificate, acceptable to and in form and substance satisfactory to the Trustee, to the effect that such transferee is not an employee benefit plan subject to Section 406 of ERISA, Section 4975 of the Code or Similar Law, nor a person acting on behalf of any such plan, which representation letter shall not be an expense of the Trustee or the Servicer. Notwithstanding anything else to the contrary herein any purported transfer of a Class A-R Certificate to or on behalf of an employee benefit plan subject to ERISA, the Code or Similar Law shall be void and of no effect. Each Holder of this Class A-R Certificate will be deemed to have agreed to be bound by the restrictions of the Agreement, including but not limited to the restrictions that (i) each person holding or acquiring any Ownership Interest in this Class A-R Certificate must be a Permitted Transferee, (ii) no Ownership Interest in this Class A-R Certificate may be transferred without delivery to the Trustee of (a) a transfer affidavit of the proposed transferee and (b) a transfer certificate of the transferor, each of such documents to be in the form described in the Agreement, (iii) each person holding or acquiring any Ownership Interest in this Class A-R Certificate must agree to require a transfer affidavit and to deliver a transfer certificate to the Trustee as required pursuant to the Agreement, (iv) each person holding or acquiring an Ownership Interest in this Class A-R Certificate must agree not to transfer an Ownership Interest in this Class A-R Certificate if it has actual knowledge that the proposed transferee is not a Permitted Transferee and (v) any attempted or purported transfer of any Ownership Interest in this Class A-R Certificate in violation of such restrictions will be absolutely null and void and will vest no rights in the purported transferee. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 2-A-1-[__[ ] Cut-off Off Date: October January 1, 2002 2006 First Distribution Date: November 25February 20, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 3.500% 2006 Initial Certificate Principal Balance of this Certificate (“Denomination”): $[ ] Original Class Certificate Principal Balance of this Class: $[ ] Percentage Interest: [ ]% Pass-Through Rate: Variable CUSIP: [___________] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 of this Class: CUSIP[___]-A-[____] Assumed Final Distribution Date: 55265K ME 6 MORTGAGE ASSET SECURITIZATION TRANSACTIONSMarch 19, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 Mortgage Pass-Through Certificates, Series 2002-7 Class 2-A-1 2036 evidencing a percentage interest the Percentage Interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a the Trust Fund consisting primarily of three pools of conventional adjustable rate, first lien mortgage loans (the "“Mortgage Loans"”) secured purchased from others by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth hereinherein and in the Agreement. Accordingly, the Certificate Principal Balance of this Certificate at any time may be less than the Initial Certificate Principal Balance as set forth on the face hereof, as described herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer Seller, or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ CEDE & CO. is the registered owner of the Percentage Interest evidenced by this Certificate (obtained by dividing the Denomination of this Certificate by the Original Class Certificate Principal Balance) in certain monthly distributions with respect to a Trust Fund consisting primarily of (a) the Mortgage Loans deposited by Mortgage Asset Securitization TransactionsGreenwich Capital Acceptance, Inc. (the "“Depositor")”) and (b) amounts on deposit in the Prefunding Account. The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above January 1, 2006 (the "“Agreement"”) among the Depositor, UBS Warburg Real Estate Securities Greenwich Capital Financial Products, Inc., as transferor seller (the "Transferor"), Wells Fargo “Seller”) and U.S. Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bank, National Association, as trustee (the "“Trustee"”). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the TrusteeCertificate Registrar.

Certificate No. 27-A-1-A-9-[__] Cut-off Date: October September 1, 2002 First Distribution Date: November October 25, 2002 Last Scheduled Distribution Date: December October 25, 2032 Pass-Through Rate: 3.5006.250% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 22,525,000 of this Class: CUSIP: 55265K ME 6 KZ 1 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 6 Mortgage Pass-Through Certificates, Series 2002-7 Class 2-A-1 6 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three seven pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bankank One, National AssociationN.A., as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 7 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 25-A-1-A-9-[__] Cut-off Date: October August 1, 2002 First Distribution Date: November September 25, 2002 Last Scheduled Distribution Date: December September 25, 2032 Pass-Through Rate: 3.500% Variable in accordance with the Agreement Initial Certificate Principal Balance of this Certificate $[__________] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 3,768,139 of this Class: CUSIP: 55265K ME 6 HN 2 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 5 Mortgage Pass-Through Certificates, Series 2002-7 5 Class 25-A-1 A-9 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three five pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bankank One, National AssociationN.A., as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 5 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 2A-A-1-[__] R-1 Cut-off Date: October July 1, 2002 2003 First Distribution Date: November August 25, 2002 2003 Last Scheduled Distribution Date: December July 25, 2032 2033 Pass-Through Rate: 3.5005.50% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 100 of this Class: CUSIP: 55265K ME 6 576434 FQ 2 ISIN: US576434FQ26 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION ALTERNATIVE LOAN TRUST 20022003-7 5 Mortgage Pass-Through Certificates, Series 20022003-7 Class 2-A-1 5 evidencing a percentage interest in the distributions allocable to the Class A-R Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three eight pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer Servicer, or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ UBS Securities LLC is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master a▇ ▇▇▇ter servicer and a custodian (the "Servicer"), ▇▇▇ ▇achovia Bank, U.S. Bank National Association, as a custodian ("U.S. Bank"), and JPMorgan Chase Bank, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Any distribution of the proceeds of any remaining assets of the Trust Fund will be made only upon presentment and surrender of this Class A-R Certificate at the Corporate Trust Office of the Trustee. No transfer of a Class A-R Certificate shall be made unless the Trustee shall have received a representation letter from the transferee of such Certificate, acceptable to and in form and substance satisfactory to the Trustee, to the effect that such transferee is not an employee benefit plan subject to Section 406 of ERISA, Section 4975 of the Code or Similar Law, nor a person acting on behalf of any such plan, which representation letter shall not be an expense of the Trustee or the Servicer. Notwithstanding anything else to the contrary herein any purported transfer of a Class A-R Certificate to or on behalf of an employee benefit plan subject to ERISA, the Code or Similar Law shall be void and of no effect. Each Holder of this Class A-R Certificate will be deemed to have agreed to be bound by the restrictions of the Agreement, including but not limited to the restrictions that (i) each person holding or acquiring any Ownership Interest in this Class A-R Certificate must be a Permitted Transferee, (ii) no Ownership Interest in this Class A-R Certificate may be transferred without delivery to the Trustee of (a) a transfer affidavit of the proposed transferee and (b) a transfer certificate of the transferor, each of such documents to be in the form described in the Agreement, (iii) each person holding or acquiring any Ownership Interest in this Class A-R Certificate must agree to require a transfer affidavit and to deliver a transfer certificate to the Trustee as required pursuant to the Agreement, (iv) each person holding or acquiring an Ownership Interest in this Class A-R Certificate must agree not to transfer an Ownership Interest in this Class A-R Certificate if it has actual knowledge that the proposed transferee is not a Permitted Transferee and (v) any attempted or purported transfer of any Ownership Interest in this Class A-R Certificate in violation of such restrictions will be absolutely null and void and will vest no rights in the purported transferee. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 2-A-1-[__] Cut-off DateDate : October May 1, 2002 2001 First Distribution DateDate : November June 25, 2002 Last Scheduled Distribution Date2001 Percentage Interest : December 25, 2032 PassCUSIP : Maturity Date : CREDIT SUISSE FIRST BOSTON MORTGAGE SECURITIES CORP. CSFB ABS Trust Series 2001-Through Rate: 3.500% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 of this Class: CUSIP: 55265K ME 6 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 HE12 CSFB Mortgage Pass-Through Certificates, Series 20022001-7 HE12 Class 2-A-1 X evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools a pool of fixed rate and adjustable rate conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties properties. Credit Suisse First Boston Mortgage Asset Securitization Transactions, Inc.Securities Corp., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Seller, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ CREDIT SUISSE FIRST BOSTON CORPORATION is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Credit Suisse First Boston Mortgage Asset Securitization Transactions, Inc. Securities Corp. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities DLJ Mortgage Capital, Inc., as transferor seller (the in such capacity, "TransferorSeller"), Wells Fargo Bank Minnesota, N.A.Calmco Servicing L.P., as master servicer (the in such capacity, "Servicer"), ▇▇▇ ▇achovia Bank, ) and U.S. Bank National Association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 29-A-1-[__] Cut-off Date: October April 1, 2002 2004 First Distribution Date: November May 25, 2002 2004 Last Scheduled Distribution Date: December April 25, 2032 2019 Pass-Through Rate: 3.5005.50% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): $[ ] Initial Certificate Principal Balances of all Certificates $99,624,000 of this Class: $121,160,000 CUSIP: 55265K ME 6 576434 QF 4 ISIN: US576434QF42 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION ALTERNATIVE LOAN TRUST 20022004-7 4 Mortgage Pass-Through Certificates, Series 20022004-7 4 Class 29-A-1 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer Servicer, the Trust Administrator, the Trustee or the Trustee Custodians referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that [_______________ ] is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank MinnesotaBank, N.A., as master servicer (in such capacity, the "ServicerServ▇▇▇▇"), ▇▇▇ ▇achovia trust administrator (in such capacity, the "Trust Administrator") and a custodian, U.S. Bank National Association, as a custodian ("U.S. Bank"), and Wachovia Bank, National Association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the applicable Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the TrusteeTrust Administrator.

Certificate No. 2A-A-1-[__] LR-1 Cut-off Date: October September 1, 2002 First Distribution Date: November October 25, 2002 Last Scheduled Distribution Date: December November 25, 2032 Pass-Through Rate: 3.500% Floating in accordance with the Agreement Initial Certificate Principal Balance of this Certificate $[______[ ] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 50 of this Class: CUSIP: 55265K ME 6 576433 CA 2 ISIN: US576433CA28 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION ADJUSTABLE RATE MORTGAGES TRUST 2002-7 4 Class A-LR Mortgage Pass-Through Certificates, Series 2002-7 Class 2-A-1 4 evidencing a percentage interest in the distributions allocable to the Class A-LR Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that ________________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor")transferor, Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇) a▇▇ ▇achovia ▇Morgan Chase Bank, National Association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Group 4 Mortgage Loans in Loan Group 2 pursuant to the terms of the AgreementLoans. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Any distribution of the proceeds of any remaining assets of the Trust Fund will be made only upon presentment and surrender of this Class A-LR Certificate at the Corporate Trust Office of the Trustee. No transfer of a Class A-LR Certificate shall be made unless the Trustee shall have received a representation letter from the transferee of such Certificate, acceptable to and in form and substance satisfactory to the Trustee, to the effect that such transferee is not an employee benefit plan subject to Section 406 of ERISA, Section 4975 of the Code or Similar Law, nor a person acting on behalf of any such plan, which representation letter shall not be an expense of the Trustee or the Servicer. Notwithstanding anything else to the contrary herein any purported transfer of a Class A-R Certificate to or on behalf of an employee benefit plan subject to ERISA, the Code or Similar Law shall be void and of no effect. Each Holder of this Class A-LR Certificate will be deemed to have agreed to be bound by the restrictions of the Agreement, including but not limited to the restrictions that (i) each person holding or acquiring any Ownership Interest in this Class A-LR Certificate must be a Permitted Transferee, (ii) no Ownership Interest in this Class A-LR Certificate may be transferred without delivery to the Trustee of (a) a transfer affidavit of the proposed transferee and (b) a transfer certificate of the transferor, each of such documents to be in the form described in the Agreement, (iii) each person holding or acquiring any Ownership Interest in this Class A-LR Certificate must agree to require a transfer affidavit and to deliver a transfer certificate to the Trustee as required pursuant to the Agreement, (iv) each person holding or acquiring an Ownership Interest in this Class A-LR Certificate must agree not to transfer an Ownership Interest in this Class A-LR Certificate if it has actual knowledge that the proposed transferee is not a Permitted Transferee and (v) any attempted or purported transfer of any Ownership Interest in this Class A-LR Certificate in violation of such restrictions will be absolutely null and void and will vest no rights in the purported transferee. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 2-A-1-[__] Cut-off Date: October April 1, 2002 2004 First Distribution Date: November May 25, 2002 2004 Last Scheduled Distribution Date: December May 25, 2032 2034 Pass-Through Rate: 3.5006.00% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): $[ ] Initial Certificate Principal Balances of all Certificates $99,624,000 of this Class: $20,000,000 CUSIP: 55265K ME 6 576434 PY 4 ISIN: US576434PY40 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION ALTERNATIVE LOAN TRUST 20022004-7 4 Mortgage Pass-Through Certificates, Series 20022004-7 4 Class 2-A-1 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer Servicer, the Trust Administrator, the Trustee or the Trustee Custodians referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that [_______________ ] is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank MinnesotaBank, N.A., as master servicer (in such capacity, the "ServicerServ▇▇▇▇"), ▇▇▇ ▇achovia trust administrator (in such capacity, the "Trust Administrator") and a custodian, U.S. Bank National Association, as a custodian ("U.S. Bank"), and Wachovia Bank, National Association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the applicable Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the TrusteeTrust Administrator.

Certificate No. 2-A-1-[__] Cut-off DateDate : October December 1, 2002 2001 First Distribution DateDate : November January 25, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 3.500% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): ) : Initial Certificate Principal Balances of all Certificates $99,624,000 of this ClassClass : CUSIPPercentage Interest : 55265K ME 6 CUSIP : Pass-Through Rate : None Maturity Date : CREDIT SUISSE FIRST BOSTON MORTGAGE ASSET SECURITIZATION TRANSACTIONSSECURITIES CORP. Credit Suisse First Boston Mortgage Securities Corp., INC. MASTR ASSET SECURITIZATION TRUST 2002Mortgage-7 Mortgage Backed Pass-Through Certificates, Series 20022001-7 33 Class 2A-A-1 P evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools a pool of fixed rate conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties properties. Credit Suisse First Boston Mortgage Asset Securitization Transactions, Inc.Securities Corp., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer Sellers, the Servicers or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ CEDE & CO, is the registered owner of the Percentage Interest evidenced by this Certificate (obtained by dividing the denomination of this Certificate by the aggregate of the denominations of all Certificates of the Class to which this Certificate belongs) in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Credit Suisse First Boston Mortgage Asset Securitization Transactions, Inc. Securities Corp. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities DLJ Mortgage Capital, Inc., as transferor a seller (the in such capacity, a "TransferorSeller"), Wells Fargo Bank Minnesota, N.A.Washington Mutual Mortgage Securities Corp., as master a seller (in such capacity, a "Seller") and a servicer (the in such capacity, a "Servicer"), ▇▇▇ ▇achovia Firstar Bank, National Association, as a seller (a "Seller"), GreenPoint Mortgage Funding, Inc., as a seller (a "Seller") and a servicer (in such capacity, a "Servicer"), Bank One, National Association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans , RBMG, Inc., as a servicer (a "Servicer") and Olympus Servicing L.P., as a servicer (in Loan Group 2 pursuant to the terms of the Agreementsuch capacity, a "Servicer") and as a special servicer (in such capacity, a "Special Servicer"). To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 21-A-1-[__] Cut-off Date: October June 1, 2002 2004 First Distribution Date: November July 25, 2002 2004 Last Scheduled Distribution Date: December July 25, 2032 2024 Pass-Through Rate: 3.5005.25% Initial Certificate Principal Balance of this Certificate $[______[ ] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 59,000,000 of this Class: CUSIP: 55265K ME 6 576434 SC 9 ISIN: US576434SC92 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION ALTERNATIVE LOAN TRUST 20022004-7 6 Mortgage Pass-Through Certificates, Series 20022004-7 6 Class 21-A-1 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer Servicer, the Trust Administrator, the Trustee or the Trustee Custodians referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that [_______________ ] is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank MinnesotaBank, N.A., as master servicer (in such capacity, the "ServicerServ▇▇▇▇"), ▇▇▇ ▇achovia trust administrator (in such capacity, the "Trust Administrator") and a custodian, U.S. Bank National Association, as a custodian ("U.S. Bank"), and Wachovia Bank, National Association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the applicable Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the TrusteeTrust Administrator.

Certificate No. 29-A-1-[__] Cut-off Date: October July 1, 2002 2004 First Distribution Date: November August 25, 2002 2004 Last Scheduled Distribution Date: December August 25, 2032 2034 Pass-Through Rate: 3.5006.00% Initial Certificate Principal Balance of this Certificate $[______[ ] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 110,000,000 of this Class: CUSIP: 55265K ME 576434 TM 6 ISIN: US576434 TM 65 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION ALTERNATIVE LOAN TRUST 20022004-7 Mortgage Pass-Through Certificates, Series 20022004-7 Class 29-A-1 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer Servicer, the Trust Administrator, the Trustee or the Trustee Custodians referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that [_______________ ] is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank MinnesotaBank, N.A., as master servicer (in such capacity, the "ServicerServ▇▇▇▇"), ▇▇▇ ▇achovia Banktrust administrator (in such capacity, the "Trust Administrator") and a custodian, U.S. Bank National Association, as a custodian and as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the applicable Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the TrusteeTrust Administrator.

Certificate No. 2-A-1-[__] 1 Cut-off DateDate : October August 1, 2002 2004 First Distribution DateDate : November 25September 27, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 3.500% 2004 Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial ) : $ 39,000.000.00 Original Class Certificate Principal Balances of all Certificates $99,624,000 Balance of this ClassClass : CUSIP$ 39,000,000.00 Percentage Interest : 55265K ME 6 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 Mortgage 100.00% Pass-Through Rate : Variable CUSIP : 317350 BA 3 Class : II-A1 Assumed Maturity Date : August 2034 Finance America Mortgage Loan Trust 2004-2 Asset-Backed Certificates, Series 20022004-7 2 Class 2II-A-1 A1 evidencing a percentage interest the Percentage Interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a the Trust Fund consisting primarily of three pools of conventional first lien adjustable rate and fixed rate mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc.FINANCIAL ASSET SECURITIES CORP., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance of this Class II-A1 Certificate at any time may be less than the Initial Certificate Principal Balance as set forth on the face hereof, as described herein. This Class II-A1 Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer Servicer, or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ Cede & Co. is the registered owner of the Percentage Interest evidenced by this Class II-A1 Certificate (obtained by dividing the Denomination of this Class II-A1 Certificate by the Original Class Certificate Principal Balance) in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Financial Asset Securitization Transactions, Inc. Securities Corp. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above August 1, 2004 (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc.HomEq Servicing Corporation, as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bankand Deutsche Bank National Trust Company, National Associationa national banking association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Class II-A1 Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Class II-A1 Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Class II-A1 Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Class II-A1 Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 2-A-1-[__] Cut-off DateDate : October 1, 2002 First Distribution DateDate : November 25, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 3.500% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): ) : $ Initial Certificate Principal Balances of all Certificates $99,624,000 of this ClassClass : CUSIP$ Pass-Through Rate : 55265K ME 6 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INCCUSIP : MELLON RESIDENTIAL FUNDING CORPORATION. MASTR ASSET SECURITIZATION TRUST 2002-7 Mortgage Pass-Through Certificates, Series 2002-7 199 - Class 2-A-1 [ ] evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools a pool of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc.MELLON RESIDENTIAL FUNDING CORPORATION, as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Seller, the Master Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _________________ is the registered owner of the Percentage Interest evidenced by this Certificate (obtained by dividing the denomination of this Certificate by the aggregate Initial Certificate Balances of all Certificates of the Class to which this Certificate belongs) in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. Mellon Residential Funding Corporation (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc._________________, as transferor seller (in such capacity, the "TransferorSeller"), Wells Fargo Bank Minnesota, N.A., ) and as master servicer (in such capacity, the "Master Servicer"), ▇▇▇ ▇achovia Bankand Norwest Bank Minnesota, National Association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee. * * * IN WITNESS WHEREOF, the Trustee has caused this Certificate to be duly executed. Dated: ____________, 19__ NORWEST BANK MINNESOTA, NATIONAL ASSOCIATION, as Trustee By _____________________________ Countersigned: By _______________________________ Authorized Signatory of NORWEST BANK MINNESOTA, NATIONAL ASSOCIATION, as Trustee EXHIBIT B [FORM OF SUBORDINATED CERTIFICATE] [UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION ("DTC"), TO ISSUER OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE, OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE, OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.] SOLELY FOR U.S. FEDERAL INCOME TAX PURPOSES, THIS CERTIFICATE IS A "REGULAR INTEREST" IN A "REAL ESTATE MORTGAGE INVESTMENT CONDUIT," AS THOSE TERMS ARE DEFINED, RESPECTIVELY, IN SECTIONS 860G AND 860D OF THE INTERNAL REVENUE CODE OF 1986, AS AMENDED (THE "CODE"). THIS CERTIFICATE IS SUBORDINATED IN RIGHT OF PAYMENT TO CERTAIN CERTIFICATES AS DESCRIBED IN THE AGREEMENT REFERRED TO HEREIN. [THE FOLLOWING INFORMATION IS PROVIDED SOLELY FOR THE PURPOSE OF APPLYING THE U.S. FEDERAL INCOME TAX ORIGINAL ISSUE DISCOUNT ("OID") RULES UNDER THE CODE TO THIS CERTIFICATE. THE ISSUE DATE OF THIS CERTIFICATE IS _________________, 199_. THE INITIAL PER ANNUM RATE OF INTEREST ON THIS CERTIFICATE IS ___%. ASSUMING THAT THE MORTGAGE LOANS PREPAY AT AN ASSUMED RATE OF PREPAYMENT OF ___% PER ANNUM (THE "PREPAYMENT ASSUMPTION"), THIS CERTIFICATE HAS BEEN ISSUED WITH $____ OF OID PER $1,000 OF THE ORIGINAL PRINCIPAL AMOUNT OF THIS CERTIFICATE; THE ANNUAL YIELD TO MATURITY OF THIS CERTIFICATE FOR PURPOSES OF COMPUTING THE ACCRUAL OF OID IS APPROXIMATELY __% (COMPOUNDED MONTHLY); THE AMOUNT OF OID ALLOCABLE TO THE SHORT FIRST ACCRUAL PERIOD IS $____ PER $1,000 OF THE ORIGINAL PRINCIPAL AMOUNT OF THIS CERTIFICATE COMPUTED USING THE MONTHLY YIELD AND DAILY COMPOUNDING DURING THE SHORT ACCRUAL PERIOD. NO REPRESENTATION IS MADE THAT THE MORTGAGE LOANS WILL PREPAY AT A RATE BASED ON THE PREPAYMENT ASSUMPTION OR AT ANY OTHER RATE. THE ACTUAL YIELD TO MATURITY MAY DIFFER FROM THAT SET FORTH ABOVE, AND THE ACCRUAL OF OID WILL BE ADJUSTED, IN ACCORDANCE WITH SECTION 1272(a)(6) OF THE CODE, TO TAKE INTO ACCOUNT EVENTS WHICH HAVE OCCURRED DURING ANY ACCRUAL PERIOD. THE PREPAYMENT ASSUMPTION IS INTENDED TO BE THE PREPAYMENT ASSUMPTION REFERRED TO IN SECTION 1272(a)(6)(B)(iii) OF THE CODE.] [THIS CERTIFICATE HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "ACT"). ANY RESALE OR TRANSFER OF THIS CERTIFICATE WITHOUT REGISTRATION THEREOF UNDER THE ACT MAY ONLY BE MADE IN A TRANSACTION EXEMPTED FROM THE REGISTRATION REQUIREMENTS OF THE ACT AND IN ACCORDANCE WITH THE PROVISIONS OF THE AGREEMENT REFERRED TO HEREIN.] B-1 105 NEITHER THIS CERTIFICATE NOR ANY INTEREST HEREIN MAY BE TRANSFERRED UNLESS THE TRANSFEREE EITHER (i) REPRESENTS TO THE TRUSTEE THAT SUCH TRANSFEREE EITHER (A) IS NOT AN EMPLOYEE BENEFIT PLAN OR ARRANGEMENT SUBJECT TO THE EMPLOYEE RETIREMENT INCOME SECURITY ACT OF 1974, AS AMENDED, OR A PLAN OR ARRANGEMENT SUBJECT TO SECTION 4975 OF THE CODE, OR (B) IS AN "INSURANCE COMPANY GENERAL ACCOUNT" AS SUCH TERM IS DEFINED IN SECTION V(e) OF PROHIBITED TRANSACTION CLASS EXEMPTION 95-60 OR (ii) DELIVERS TO THE TRUSTEE AN OPINION OF COUNSEL IN ACCORDANCE WITH THE PROVISIONS OF THE AGREEMENT REFERRED TO HEREIN. [ANY SUCH REPRESENTATION UNDER (A)(i) OR (ii) SHALL BE DEEMED TO HAVE BEEN MADE TO THE TRUSTEE BY THE TRANSFEREE'S ACCEPTANCE OF A CERTIFICATE OF THIS CLASS AND BY A BENEFICIAL OWNER'S ACCEPTANCE OF ITS INTEREST IN A CERTIFICATE OF THIS CLASS.] NOTWITHSTANDING ANYTHING ELSE TO THE CONTRARY HEREIN, ANY PURPORTED TRANSFER OF THIS CERTIFICATE TO OR ON BEHALF OF AN EMPLOYEE BENEFIT PLAN SUBJECT TO ERISA OR TO THE CODE WITHOUT THE OPINION OF COUNSEL SATISFACTORY TO THE TRUSTEE AS DESCRIBED ABOVE SHALL BE VOID AND OF NO EFFECT. Certificate No. : Cut-off Date : First Distribution Date : Initial Certificate Balance of this Certificate ("Denomination") : $ Initial Certificate Balances of all Certificates of this Class : $ Pass-Through Rate : [CUSIP :] MELLON RESIDENTIAL FUNDING CORPORATION. Mortgage Pass-Through Certificates, Series 199 - Class [ ] evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of a pool of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties MELLON RESIDENTIAL FUNDING CORPORATION, as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Balance at any time may be less than the Certificate Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the B-2 106 Depositor, the Seller, the Master Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _________________ is the registered owner of the Percentage Interest evidenced by this Certificate (obtained by dividing the denomination of this Certificate by the aggregate Initial Certificate Balances of all Certificates of the Class to which this Certificate belongs) in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mellon Residential Funding Corporation (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, ____________________, as seller (in such capacity, the "Seller") and as master servicer (in such capacity, the "Master Servicer"), and Norwest Bank Minnesota, National Association, as trustee (the "Trustee"). To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. [No transfer of a Certificate of this Class shall be made unless such transfer is made pursuant to an effective registration statement under the Securities Act and any applicable state securities laws or is exempt from the registration requirements under said Act and such laws. In the event that a transfer is to be made in reliance upon an exemption from the Securities Act and such laws, in order to assure compliance with the Securities Act and such laws, the Certificateholder desiring to effect such transfer and such Certificateholder's prospective transferee shall each certify to the Trustee in writing the facts surrounding the transfer. In the event that such a transfer is to be made within three years from the date of the initial issuance of Certificates pursuant hereto, there shall also be delivered (except in the case of a transfer pursuant to Rule 144A of the Securities Act) to the Trustee an Opinion of Counsel that such transfer may be made pursuant to an exemption from the Securities Act and such state securities laws, which Opinion of Counsel shall not be obtained at the expense of the Trustee, the Seller, the Master Servicer or the Depositor. The Holder hereof desiring to effect such transfer shall, and does hereby agree to, indemnify the Trustee and the Depositor against any liability that may result if the transfer is not so exempt or is not made in accordance with such federal and state laws.] No transfer of a Certificate of this Class shall be made unless the Trustee shall have received either (i) a representation [letter] from the transferee of such Certificate, acceptable to and in form and substance satisfactory to the Trustee, to the effect that such transferee is not an employee benefit plan or arrangement subject to Section 406 of ERISA or Section 4975 of the Code, nor a person acting on behalf of any such plan or arrangement, which representation letter shall not be an expense of the Trustee or the Master Servicer, (ii) if the purchaser is an insurance company, a representation that the purchaser is an insurance company which is purchasing such Certificates with funds contained in an "insurance company general account" (as such term is defined in Section V(e) of Prohibited Transaction Class Exemption 95-60 ("PTCE 95-60")), or (iii) in the case of any such Certificate presented for registration in the name of an employee benefit plan subject to ERISA or Section 4975 of the Code (or comparable provisions of any subsequent enactments), or a trustee of any such plan or any other person acting on behalf of any such plan, an Opinion of Counsel satisfactory to the Trustee and the Master Servicer to the effect that the purchase or holding of such Certificate will not result in a prohibited transaction and will not subject the Trustee to any obligation in addition to those undertaken in the Agreement, which Opinion of Counsel shall not be an expense of the Trustee or the Master Servicer. [Such representation shall be deemed to have been made to the Trustee by the Transferee's acceptance of a Certificate of this Class and by a beneficial owner's acceptance of its interest in a Certificate of this Class.] Notwithstanding anything else to the contrary herein, any purported transfer of a Certificate of this Class to or on behalf of an employee benefit plan subject to ERISA or to the Code without the opinion of counsel satisfactory to the Trustee as described above shall be void and of no effect. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee. * * *

Certificate No. 25-A-1-A-5-[__] Cut-off Date: October August 1, 2002 First Distribution Date: November September 25, 2002 Last Scheduled Distribution Date: December September 25, 2032 Pass-Through Rate: 3.5006.250% Initial Certificate Principal Balance of this Certificate $[__________] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 6,306,000 of this Class: CUSIP: 55265K ME 6 HJ 1 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 5 Mortgage Pass-Through Certificates, Series 2002-7 5 Class 25-A-1 A-5 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three five pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bankank One, National AssociationN.A., as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 5 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 29-A-1-[__] Cut-off Date: October June 1, 2002 2004 First Distribution Date: November July 25, 2002 2004 Last Scheduled Distribution Date: December July 25, 2032 2034 Pass-Through Rate: 3.5005.75% Initial Certificate Principal Balance of this Certificate $[______[ ] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 40,000,000 of this Class: CUSIP: 55265K ME 6 576434 SM 7] ISIN: US576434SM74 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION ALTERNATIVE LOAN TRUST 20022004-7 6 Mortgage Pass-Through Certificates, Series 20022004-7 Class 2-A-1 6 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer Servicer, the Trust Administrator, the Trustee or the Trustee Custodians referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that [_______________ ] is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank MinnesotaBank, N.A., as master servicer (in such capacity, the "ServicerServ▇▇▇▇"), ▇▇▇ ▇achovia trust administrator (in such capacity, the "Trust Administrator") and a custodian, U.S. Bank National Association, as a custodian ("U.S. Bank"), and Wachovia Bank, National Association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the applicable Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the TrusteeTrust Administrator.

Certificate No. 24-A-1-A-6-[__] Cut-off Date: October September 1, 2002 First Distribution Date: November October 25, 2002 Last Scheduled Distribution Date: December October 25, 2032 Pass-Through Rate: 3.5006.000% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 11,533,000 of this Class: CUSIP: 55265K ME 6 KJ 7 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 6 Mortgage Pass-Through Certificates, Series 2002-7 Class 2-A-1 6 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three seven pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bankank One, National AssociationN.A., as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 4 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 2-A-1-[__] Cut-off Off Date: October April 1, 2002 2001 First Distribution Date: November 25May 15, 2002 Last 2001 Final Scheduled Distribution Date: December 25April 15, 2032 Pass-Through Rate: 3.500% 2004 Initial Certificate Principal Balance Notional Amount of this Certificate $[______] ("Denomination"): Initial Notional Amount of Class IO Certificates: None Certificate Principal Balances of all Certificates $99,624,000 of this Rate : Variable CUSIP: Class: CUSIPIO Percentage Interest Evidenced by this Certificate: 55265K ME 6 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION SOUNDVIEW HOME EQUITY LOAN TRUST 20022001-7 Mortgage Pass1 Home Equity Loan Asset-Through Backed Certificates, Series 20022001-7 1 Class 2-A-1 IO evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three pools a pool of conventional mortgage closed-end fixed rate and adjustable-rate home equity loans (the "Mortgage Loans") secured by first liens on one- This Certificate does not have a principal balance and will not be entitled to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal distributions of principal. Interest only in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer Seller or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ CEDE & CO. is the registered owner of the Percentage Interest evidenced by this Certificate (obtained by dividing the Denomination of this Certificate by the Class Principal Balance) in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor")Trust. The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Off Date specified above (the "Agreement") among Financial Asset Securities Corp., as depositor (the "Depositor"), UBS Warburg Real Estate Securities Saxon Mortgage, Inc., as transferor seller (the "TransferorSeller") and master servicer (the "Master Servicer"), Wells Fargo Bank MinnesotaMeritech Mortgage Services, N.A.Inc., as master servicer (the "Servicer")) and Wells Fargo Bank Minnesota, National ▇▇▇ ▇achovia Bank, National Association▇ciation, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Class Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 25-A-1-A-15-[__] Cut-off Date: October August 1, 2002 First Distribution Date: November September 25, 2002 Last Scheduled Distribution Date: December September 25, 2032 Pass-Through Rate: 3.5006.250% Initial Certificate Principal Balance of this Certificate $[__________] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 6,739,000 of this Class: CUSIP: 55265K ME HU 6 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 5 Mortgage Pass-Through Certificates, Series 2002-7 Class 2-A-1 5 evidencing a percentage interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a Trust Fund consisting primarily of three five pools of conventional mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance at any time may be less than the Certificate Principal Balance as set forth herein. This Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ is the registered owner of the Percentage Interest evidenced by this Certificate in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Asset Securitization Transactions, Inc. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), ▇▇▇ ▇achovia Bankank One, National AssociationN.A., as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 5 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.

Certificate No. 2-A-1-[__] 1 Cut-off DateDate : October April 1, 2002 2003 First Distribution DateDate : November 25May 26, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 3.500% 2003 Initial Certificate Principal Balance of this Certificate ("Denomination") : $[__] Original Class Certificate Principal Balance of this Class : $[__] Percentage Interest : 100.00% Pass-Through Rate : [__]% CUSIP : 32027N BX 8 Class : A-1 Assumed Maturity Date : [________________] ("Denomination"): Initial Certificate Principal Balances of all Certificates $99,624,000 of this Class: CUSIP: 55265K ME 6 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002First Franklin Mortgage Loan Trust 2003-7 Mortgage PassFF1 Asset-Through Backed Certificates, Series 20022003-7 FF1 Class 2-A-1 evidencing a percentage interest the Percentage Interest in the distributions allocable to the Certificates of the above-referenced Class with respect to a the Trust Fund consisting primarily of three pools of conventional first lien adjustable-rate and fixed-rate mortgage loans (the "Mortgage Loans") secured by first liens on one- to four-family residential properties Mortgage Asset Securitization Transactions, Inc.FINANCIAL ASSET SECURITIES CORP., as Depositor Principal in respect of this Certificate is distributable monthly as set forth herein. Accordingly, the Certificate Principal Balance of this Class A-1 Certificate at any time may be less than the Initial Certificate Principal Balance as set forth on the face hereof, as described herein. This Class A-1 Certificate does not evidence an obligation of, or an interest in, and is not guaranteed by the Depositor, the Servicer Servicer, or the Trustee referred to below or any of their respective affiliates. Neither this Certificate nor the Mortgage Loans are guaranteed or insured by any governmental agency or instrumentality. This certifies that _______________ Cede & Co. is the registered owner of the Percentage Interest evidenced by this Class A-1 Certificate (obtained by dividing the Denomination of this Class A-1 Certificate by the Original Class Certificate Principal Balance) in certain monthly distributions with respect to a Trust Fund consisting primarily of the Mortgage Loans deposited by Mortgage Financial Asset Securitization Transactions, Inc. Securities Corp. (the "Depositor"). The Trust Fund was created pursuant to a Pooling and Servicing Agreement dated as of the Cut-off Date specified above April 1, 2003 (the "Agreement") among the Depositor, UBS Warburg Real Estate Securities Inc.Fairbanks Capital Corp., as transferor (the "Transferor"), Wells Fargo Bank Minnesota, N.A., as master servicer (the "Servicer"), and W▇▇▇▇ ▇achovia BankFargo Bank Minnesota, National Association, a national banking association, as trustee (the "Trustee"). Distributions on this Certificate will be made primarily from collections on the Mortgage Loans in Loan Group 2 pursuant to the terms of the Agreement. To the extent not defined herein, the capitalized terms used herein have the meanings assigned in the Agreement. This Class A-1 Certificate is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Class A-1 Certificate by virtue of the acceptance hereof assents and by which such Holder is bound. Reference is hereby made to the further provisions of this Class A-1 Certificate set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. This Class A-1 Certificate shall not be entitled to any benefit under the Agreement or be valid for any purpose unless manually countersigned by an authorized signatory of the Trustee.