1 EXHIBIT 23.1 CONSENT OF INDEPENDENT AUDITORS We consent to the incorporation by reference in the following Registration Statements of National Processing, Inc. of our report dated January 20, 2000, with respect to the consolidated financial statements of National Processing, Inc. included in its Annual Report (Form 10-K) for the year ended December 31, 1999. Registration Statement Description Shares Registered - -------------------------------------------------------------------------------------------------- Form S-8 (33-53345) National Processing Company, Inc. 200,000 Nonemployee Directors Stock Option Plan Form S-8 (33-53347) National Processing Company, Inc. 4,000,000 1996 Stock Option Plan /s/ ERNST & YOUNG LLP Cleveland, Ohio March 20, 2000