Exhibit 23.1
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We consent to the incorporation by reference in the Registration Statements No. 333-63342,333-103266,333-131601,333-131602,333-132844,333-132845,333-138654,333-146080,333-157575,333-158960,333-162262,333-190793,333-206214,333-206832, and333-208266 on FormS-8 andNo. 333-131593 and333-212372 on FormS-3 of Fidelity National Information Services, Inc., of our report dated February 26, 2019, relating to the consolidated financial statements and financial statement schedule of Worldpay, Inc. (which report expresses an unqualified opinion and includes an explanatory paragraph relating to a change in accounting principle for the accounting for revenue from contracts with customers), appearing in this Current Report on Form8-K of Fidelity National Information Services, Inc.
/s/ DELOITTE & TOUCHE LLP
Cincinnati, Ohio
May 13, 2019
