Common Contracts

POOLING AND SERVICING AGREEMENT Washington Mutual Mortgage Pass-Through Certificates WMALT Series 2006-3 Trust WaMu Asset Acceptance Corp. Washington Mutual Mortgage Pass-Through Certificates WMALT Series 2006-3 Cut-Off Date: March 1, 2006

Pooling and Servicing Agreement • April 13th, 2006 • Washington Mutual Mortgage Pass-Through Certificates, WMALT Series 2006-3 • Asset-backed securities • Delaware

• Contract Type
  Pooling and Servicing Agreement
• Filed
  April 13th, 2006
• Company
  Washington Mutual Mortgage Pass-Through Certificates, WMALT Series 2006-3
• Industry
  Asset-backed securities
• Jurisdiction
  Delaware

This Pooling and Servicing Agreement, dated as of March 1, 2006 (this “Agreement”), is by and among WaMu Asset Acceptance Corp., as depositor (the “Company”), Washington Mutual Bank, as Servicer, LaSalle Bank National Association, as Trustee, and Christiana Bank & Trust Company, as Delaware Trustee. Capitalized terms used in this Agreement and not otherwise defined have the meanings ascribed to such terms in Article I hereof.

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP., as Depositor and WASHINGTON MUTUAL BANK, as Servicer and LASALLE BANK NATIONAL ASSOCIATION, as Trustee and CHRISTIANA BANK & TRUST COMPANY,

Pooling and Servicing Agreement • August 11th, 2005 • Washington Mutual Mortgage Pass-Through Certificates, WMALT Series 2005-6 • Asset-backed securities • Delaware

• Contract Type
  Pooling and Servicing Agreement
• Filed
  August 11th, 2005
• Company
  Washington Mutual Mortgage Pass-Through Certificates, WMALT Series 2005-6
• Industry
  Asset-backed securities
• Jurisdiction
  Delaware

This Pooling and Servicing Agreement, dated and effective as of July 1, 2005 (this “Agreement”), is executed by and among Washington Mutual Mortgage Securities Corp., as depositor (the “Company”), Washington Mutual Bank, as Servicer (the “Servicer”), LaSalle Bank National Association, a national banking association with a corporate trust office at 135 South LaSalle Street, Suite 1625, Chicago, Illinois 60603, as Trustee (the “Trustee”), and Christiana Bank & Trust Company, as Delaware Trustee (the “Delaware Trustee”). Capitalized terms used in this Agreement and not otherwise defined have the meanings ascribed to such terms in Article I hereof.