Exhibit 2.20 CERTIFICATE OF CANCELLATION OF LIMITED PARTNERSHIP OF AMERICAN INCOME PARTNERS V-A LIMITED PARTNERSHIP The undersigned, American Income Partners V-A Limited Partnership (the "Partnership"), hereby certifies for purposes of Section 10 of M.G.L. Chapter 109, as follows: 1. The name of the Partnership is American Income Partners V-A Limited Partnership. 2. The date of filing of its certificate (the "Certificate") of limited partnership was July 24, 1989. 3. The reason for filing the certificate of cancellation is that the Partnership has dissolved pursuant to the terms of its limited partnership agreement and will not be henceforth pursuing the activities contemplated in its Certificate. 4. The effective date of cancellation shall be on the date of filing of this certificate. IN WITNESS WHEREOF, the undersigned has executed this instrument under seal as of this 24th day of September 2002. AMERICAN INCOME PARTNERS V-A LIMITED PARTNERSHIP By: AFG Leasing IV Incorporated, its sole General Partner By: /s/Wayne Engle --------------- Name: Wayne Engle Title: Vice President