Exhibit 23.3 [GRAPHIC OMITTED][AMERICAN APRAISAL ASSOCIATES LOGO] 411 East Wisconsin Avenue Suite 1900 P.O. Box 664 Milwaukee, Wisconsin 53202-0664 Telephone: (414) 271-7240 www.american-appraisal.com United States International ------------- -------------- Atlanta Milwaukee Brazil Mexico Boston Minneapolis Canada Morocco Buffalo New Orleans China Philippines Charlotte New York Croatia Portugal Chicago Oak Lawn Czech Republic Russia Cincinnati Philadelphia England Spain Dallas Pittsburgh Germany Taiwan Denver Princeton Greece Thailand Detroit Schaumburg Hong Kong Turkey Houston St. Louis Hungary Venezuela Irvine San Francisco Italy Jacksonville Seattle Japan Los Angeles CONSENT OF INDEPENDENT APPRAISER -------------------------------- American Appraisal Associates, Inc. ("AAA") hereby consents to the incorporation by reference of its preliminary conclusions of value in Amendment No. 3 to Registration Statement No. 333-104270 of Fiserv, Inc. on Form S-3 ("Form S-3"). Specifically, AAA consents Fiserv's reference to the stated preliminary conclusions of value of $55.9 million for the intangible assets included in the preliminary purchase price allocation for the CNS acquisition, referenced in "Note 2. Acquisitions" of Fiserv's 2002 10K filing, which is incorporated by reference into Fiserv's Form S-3. AMERICAN APPRAISAL ASSOCIATES, INC. By /s/ T. Michael Rathburn ---------------------------------- T. Michael Rathburn Associate General Counsel Milwaukee, Wisconsin July 8, 2003