EXHIBIT 23.1 INDEPENDENT AUDITORS' CONSENT We consent to the incorporation by reference in this Registration Statement of Fiserv, Inc. on Form S-8 of our reports dated January 30, 1998, appearing in and incorporated by reference in the Annual Report on Form 10-K of Fiserv, Inc. for the year ended December 31, 1997. /s/DELOITTE & TOUCHE LLP Deloitte & Touche LLP Milwaukee, Wisconsin September 25, 1998 - vii -