Common use of Certificate No Clause in Contracts

Certificate No. 2-A-6-[__] Cut-off Date: October 1, 2002 First Distribution Date: November 25, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 6.000% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $7,600,000 of this Class: CUSIP: 55265K MK 2 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 Mortgage Pass-Through Certificates, Series 2002-7 Class 2-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"), xxx Xachovia 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-6-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: 6.0005.25% Initial Certificate Principal Balance of this Certificate $[______[ ] ("Denomination"): Initial Certificate Principal Balances of all Certificates $7,600,000 25,404,000 of this Class: CUSIP: 55265K MK 2 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-6 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 capxxxxx, the "Servicer"), xxx Xachovia 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-6-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: 6.000% Variable in accordance with the Agreement Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $7,600,000 8,333,333 of this Class: CUSIP: 55265K MK 2 MA 4 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 Mortgage Pass-Through Certificates, Series 2002-7 Class 21-A-6 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"), xxx Xachovia 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-6-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: 6.0005.500% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $7,600,000 1,800,000 of this Class: CUSIP: 55265K MK 2 MD 8 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 Mortgage Pass-Through Certificates, Series 2002-7 Class 21-A-6 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"), xxx Xachovia 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-6-A-1-[__] Cut-off Date: October 1, 2002 First Distribution Date: November 25, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 6.0003.500% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $7,600,000 99,624,000 of this Class: CUSIP: 55265K MK 2 ME 6 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 Mortgage Pass-Through Certificates, Series 2002-7 Class 2-A-6 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"), xxx Xachovia 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-6-A-11-[__] Cut-off Date: October 1, 2002 First Distribution Date: November 25, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 6.000% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $7,600,000 13,121,000 of this Class: CUSIP: 55265K MK 2 MQ 9 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 Mortgage Pass-Through Certificates, Series 2002-7 Class 2-A-6 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"), xxx Xachovia 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-6-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: 6.0005.500% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $7,600,000 352,108,667 of this Class: CUSIP: 55265K MK 2 LZ 0 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 Mortgage Pass-Through Certificates, Series 2002-7 Class 21-A-6 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"), xxx Xachovia 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-6-A-9-[__] Cut-off Date: October 1, 2002 First Distribution Date: November 25, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 6.000% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $7,600,000 50,500,000 of this Class: CUSIP: 55265K MK 2 MN 6 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 Mortgage Pass-Through Certificates, Series 2002-7 Class 2-A-6 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"), xxx Xachovia 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-6-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: 6.0006.50% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): $[ ] Initial Certificate Principal Balances of all Certificates $7,600,000 of this Class: $95,000,000 CUSIP: 55265K MK 2 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-6 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 "ServicerServxxxx"), xxx Xachovia 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-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: 6.0005.25% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): $[ ] Initial Certificate Principal Balances of all Certificates $7,600,000 of this Class: $2,000,000 CUSIP: 55265K MK 2 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-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 "ServicerMastxx Xxrvicer"), xxx Xachovia 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. 25-A-6-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: 6.0004.75% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): $[ ] Initial Certificate Principal Balances of all Certificates $7,600,000 of this Class: $26,000,000 CUSIP: 55265K MK 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-6 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 "ServicerServxxxx"), xxx Xachovia 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-6-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: 6.000% Initial Certificate Principal Balance of this Certificate $[__________] ("Denomination"): Initial Certificate Principal Balances of all Certificates $7,600,000 71,350,000 of this Class: CUSIP: 55265K MK 2 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-6 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"), xxx Xachovia BankXank 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. 21-A-6-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: 6.0005.50% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): $[ ] Initial Certificate Principal Balances of all Certificates $7,600,000 of this Class: $63,374,000 CUSIP: 55265K MK 2 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-6 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 "ServicerServxxxx"), xxx Xachovia 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. 23-A-6-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: 6.000% Initial Certificate Principal Balance of this Certificate $[__________] ("Denomination"): Initial Certificate Principal Balances of all Certificates $7,600,000 233,970,000 of this Class: CUSIP: 55265K MK 2 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-6 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"), xxx Xachovia BankXank 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-6-[__[ ] 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: 6.000% 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 $7,600,000 of this Class: CUSIP[___]-A-[____] Assumed Final Distribution Date: 55265K MK 2 MORTGAGE ASSET SECURITIZATION TRANSACTIONSMarch 19, INC. MASTR ASSET SECURITIZATION TRUST 20022036 HarborView Mortgage Loan Trust 2006-7 1, Mortgage Loan Pass-Through Certificates, Series 20022006-7 1 Class 2-A-6 [__]-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 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 TransactionsGREENWICH CAPITAL ACCEPTANCE, Inc.INC., as Depositor 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"), xxx Xachovia 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. 25-A-6-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: 6.0006.250% Initial Certificate Principal Balance of this Certificate $[__________] ("Denomination"): Initial Certificate Principal Balances of all Certificates $7,600,000 52,000,000 of this Class: CUSIP: 55265K MK 2 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-6 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"), xxx Xachovia BankXank 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-6-A-2-[__] Cut-off Date: October 1, 2002 First Distribution Date: November 25, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 6.0005.500% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $7,600,000 10,000,000 of this Class: CUSIP: 55265K MK 2 MW 6 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 Mortgage Pass-Through Certificates, Series 2002-7 Class 23-A-6 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"), xxx Xachovia 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. 29-A-6-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: 6.0005.75% Initial Certificate Principal Balance of this Certificate $[______[ ] ("Denomination"): Initial Certificate Principal Balances of all Certificates $7,600,000 40,000,000 of this Class: CUSIP: 55265K MK 2 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-6 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 "ServicerServxxxx"), xxx Xachovia 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. 25-A-6-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: 6.000% Variable in accordance with the Agreement Initial Certificate Principal Balance of this Certificate $[__________] ("Denomination"): Initial Certificate Principal Balances of all Certificates $7,600,000 15,781,250 of this Class: CUSIP: 55265K MK 2 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-6 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"), xxx Xachovia BankXank 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-6-[__] 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: 6.000% Floating in accordance with the Agreement Initial Certificate Principal Balance of this Certificate $[______[ ] ("Denomination"): Initial Certificate Principal Balances of all Certificates $7,600,000 50 of this Class: CUSIP: 55265K MK 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-6 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"), xxx Xachovia ) axx XXMorgan 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. 23-A-6-A-1-[__] Cut-off Date: October 1, 2002 First Distribution Date: November 25, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 6.0005.500% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $7,600,000 67,168,000 of this Class: CUSIP: 55265K MK 2 MV 8 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 Mortgage Pass-Through Certificates, Series 2002-7 Class 23-A-6 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"), xxx Xachovia 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-6-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: 6.0006.250% Initial Certificate Principal Balance of this Certificate $[__________] ("Denomination"): Initial Certificate Principal Balances of all Certificates $7,600,000 6,306,000 of this Class: CUSIP: 55265K MK 2 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-6 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"), xxx Xachovia BankXank 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. 25-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: 6.0006.250% Initial Certificate Principal Balance of this Certificate $[__________] ("Denomination"): Initial Certificate Principal Balances of all Certificates $7,600,000 909,000 of this Class: CUSIP: 55265K MK 2 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-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"), xxx Xachovia BankXank 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-6-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: 6.000% Variable in accordance with the Agreement Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $7,600,000 7,384,000 of this Class: CUSIP: 55265K MK 2 LE 7 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 6 Mortgage Pass-Through Certificates, Series 2002-7 Class 2-A-6 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"), xxx Xachovia BankXank 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-6-[__] 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: 6.0005.500% Initial Certificate Principal Balance of this Certificate $[______] 100 ("Denomination"): Initial Certificate Principal Balances of all Certificates $7,600,000 100 of this Class: CUSIP: 55265K MK 2 ZM 4 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 20022003-7 6 Mortgage Pass-Through Certificates, Series 20022003-7 Class 2-A-6 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 "ServicerServicex"), xxx Xachovia 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-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: 6.0006.250% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $7,600,000 7,150,000 of this Class: CUSIP: 55265K MK 2 KW 8 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 6 Mortgage Pass-Through Certificates, Series 2002-7 Class 2-A-6 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"), xxx Xachovia BankXank 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-6-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: 6.0006.00% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): $[ ] Initial Certificate Principal Balances of all Certificates $7,600,000 of this Class: $20,000,000 CUSIP: 55265K MK 2 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-6 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 "ServicerServxxxx"), xxx Xachovia 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-6-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: 6.000% Variable in accordance with the Agreement Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $7,600,000 67,866,000 of this Class: CUSIP: 55265K MK 2 KS 7 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 6 Mortgage Pass-Through Certificates, Series 2002-7 Class 2-A-6 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"), xxx Xachovia BankXank 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-6-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: 6.0006.500% Initial Certificate Principal Balance of this Certificate $[__________] ("Denomination"): Initial Certificate Principal Balances of all Certificates $7,600,000 151,299,000 of this Class: CUSIP: 55265K MK 2 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-6 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"), xxx Xachovia BankXank 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. 21-A-6-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: 6.0005.750% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $7,600,000 108,000,000 of this Class: CUSIP: 55265K MK 2 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-6 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"), xxx Xachovia BankXank 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. 29-A-6-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: 6.0005.50% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): $[ ] Initial Certificate Principal Balances of all Certificates $7,600,000 of this Class: $121,160,000 CUSIP: 55265K MK 2 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-6 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 "ServicerServxxxx"), xxx Xachovia 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. 25-A-6-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: 6.0004.500% Initial Certificate Principal Balance of this Certificate $[__________] ("Denomination"): Initial Certificate Principal Balances of all Certificates $7,600,000 64,962,563 of this Class: CUSIP: 55265K MK 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-6 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"), xxx Xachovia BankXank 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. 21-A-6-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: 6.0005.50% Initial Certificate Principal Balance of this Certificate $[______[ ] ("Denomination"): Initial Certificate Principal Balances of all Certificates $7,600,000 28,350,000 of this Class: CUSIP: 55265K MK 2 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-6 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 "ServicerServxxxx"), xxx Xachovia 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-6-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: 6.0006.00% Initial Certificate Principal Balance of this Certificate $[______[ ] ("Denomination"): Initial Certificate Principal Balances of all Certificates $7,600,000 110,000,000 of this Class: CUSIP: 55265K MK 2 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-6 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 "ServicerServxxxx"), xxx Xachovia 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. 27-A-6-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: 6.000% Variable in accordance with the Agreement Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $7,600,000 5,407,500 of this Class: CUSIP: 55265K MK 2 LH 0 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 6 Mortgage Pass-Through Certificates, Series 2002-7 Class 2-A-6 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"), xxx Xachovia BankXank 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-6-A-1-[__] Cut-off Date: October September 1, 2002 2004 First Distribution Date: November October 25, 2002 2004 Last Scheduled Distribution Date: December September 25, 2032 2019 Pass-Through Rate: 6.0004.50% Initial Certificate Principal Balance of this Certificate ("Denomination"): $[_______________] ("Denomination"): Initial Certificate Principal Balances of all Certificates $7,600,000 of this Class: $36,000,000 CUSIP: 55265K MK 2 576434 VU 5 ISIN: US576434VU 53 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION ALTERNATIVE LOAN TRUST 20022004-7 10 Mortgage Pass-Through Certificates, Series 20022004-7 10 Class 21-A-6 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 capxxxxx, the "Servicer"), xxx Xachovia trust administrator (in such capacity, the "Trust Administrator") and a custodian, U.S. Bank National Association, as a 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-6-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: 6.0006.250% Initial Certificate Principal Balance of this Certificate $[__________] ("Denomination"): Initial Certificate Principal Balances of all Certificates $7,600,000 2,772,000 of this Class: CUSIP: 55265K MK 2 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-6 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"), xxx Xachovia BankXank 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. 25-A-6-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: 6.000% Variable in accordance with the Agreement Initial Certificate Principal Balance of this Certificate $[__________] ("Denomination"): Initial Certificate Principal Balances of all Certificates $7,600,000 3,768,139 of this Class: CUSIP: 55265K MK 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-6 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"), xxx Xachovia BankXank 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-6-A-15-[__] Cut-off Date: October 1, 2002 First Distribution Date: November 25, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 6.000% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $7,600,000 1,000,000 of this Class: CUSIP: 55265K MK 2 MU 0 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 Mortgage Pass-Through Certificates, Series 2002-7 Class 2-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"), xxx Xachovia 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-6-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: 6.0005.25% Initial Certificate Principal Balance of this Certificate $[______[ ] ("Denomination"): Initial Certificate Principal Balances of all Certificates $7,600,000 59,000,000 of this Class: CUSIP: 55265K MK 2 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-6 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 "ServicerServxxxx"), xxx Xachovia 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-6-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: 6.0005.50% Initial Certificate Principal Balance of this Certificate $[_________] ("Denomination"): Initial Certificate Principal Balances of all Certificates $7,600,000 37,000,000 of this Class: CUSIP: 55265K MK 2 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-6 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 "ServicerServxxxx"), xxx Xachovia 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. 25-A-6-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: 6.0007.000% Initial Certificate Principal Balance of this Certificate $[______[ ] ("Denomination"): Initial Certificate Principal Balances of all Certificates $7,600,000 94,589,000 of this Class: CUSIP: 55265K MK 2 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-6 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"), xxx Xachovia BankXank 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. 25-A-6-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: 6.000% Variable in accordance with the Agreement Initial Certificate Principal Balance of this Certificate $[__________] ("Denomination"): Initial Certificate Principal Balances of all Certificates $7,600,000 2,153,222 of this Class: CUSIP: 55265K MK 2 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-6 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"), xxx Xachovia BankXank 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-6-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: 6.000% Variable in accordance with the Agreement Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): Initial Certificate Principal Balances of all Certificates $7,600,000 11,928,500 of this Class: CUSIP: 55265K MK LG 2 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC. MASTR ASSET SECURITIZATION TRUST 2002-7 6 Mortgage Pass-Through Certificates, Series 2002-7 Class 2-A-6 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"), xxx Xachovia BankXank 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-6-A-1-[__] Cut-off Date: October August 1, 2002 First Distribution Date: November September 25, 2002 Last Scheduled Distribution Date: December 25, 2032 Pass-Through Rate: 6.0006.00% Initial Certificate Principal Balance of this Certificate $[_________] ("Denomination"): Initial Certificate Principal Balances of all Certificates $7,600,000 10,000,000 of this Class: CUSIP: 55265K MK 2 MORTGAGE ASSET SECURITIZATION TRANSACTIONS, 61746W RG 7 MORGAN STANLEY DEAN WITTER CAPITAL I INC. MASTR ASSET SECURITIZATION MORGAN STANLEY DXXX XXTXXX XXXXXXX X XXX. TRUST 2002-7 Mortgage PassWL1 Xxxxxaxx Xxxx-Through CertificatesXxxxxxx Xxxtificates, Series 2002-7 WL1 Class 21-A-6 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, Morgan Stanley Dean Witter Capital I Inc., as Depositor Principal in respect of this Prxxxxxxl xx xxxxxxx xx xxxx 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, Morgan Stanley Dean Witter Capital I Inc. (the "Depositor"). The Trust Fund was created pursuant Xxxx xax xxxxxxx xxxxxxxx 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 Dean Witter Mortgage Capital Inc., as transferor (the "TransferorTxxxxxxrxx"), Wells Fargo Bank Xxxxx Xxxxx Xank Minnesota, N.A., as master servicer (the "Servicer"), xxx Xachovia BankXank 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-6-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: 6.0005.50% Initial Certificate Principal Balance of this Certificate $[______] ("Denomination"): $[ ] Initial Certificate Principal Balances of all Certificates $7,600,000 of this Class: $44,310,000 CUSIP: 55265K MK 2 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-6 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 "ServicerServxxxx"), xxx Xachovia 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-6-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: 6.000% Initial Certificate Principal Balance of this Certificate $[__________] ("Denomination"): Initial Certificate Principal Balances of all Certificates $7,600,000 20,000,000 of this Class: CUSIP: 55265K MK 2 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-6 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"), xxx Xachovia BankXank 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.