EX-99.A 3 y56576ex99-a.txt JOINT FILING AGREEMENT Page 11 of 11 EXHIBIT A AGREEMENT JOINT FILING OF SCHEDULE 13G The undersigned hereby agree to jointly prepare and file with regulatory authorities a Schedule 13G and any future amendments thereto reporting each of the undersigned's ownership of securities of U.S. Wireless Data, Inc. and hereby affirm that such Schedule 13G is being filed on behalf of each of the undersigned. Dated: January 14, 2002 /s/ Jay R. Petschek --------------------- Jay R. Petschek Dated: January 14, 2002 Corsair Capital Partners, L.P. By: /s/ Jay R. Petschek --------------------- Jay R. Petschek General Partner Dated: January 14, 2002 Corsair Capital Partners II, L.P. By: Corsair Managing Partners, General Partner By: Corsair Management Company, Inc., a general partner By: /s/ Jay R. Petschek --------------------- Jay R. Petschek President Dated: January 14, 2002 Corsair Management Company, Inc. By: /s/ Jay R. Petschek --------------------- Jay R. Petschek President Dated: January 14, 2002 Corsair Managing Partners By: Corsair Management Company, Inc., a general partner By: /s/ Jay R. Petschek --------------------- Jay R. Petschek President