Exhibit 5.1
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777 E WISCONSIN AVE MILWAUKEE, WI 53202-5306 414.271.2400 TEL 414.297.4900 FAX FOLEY.COM |
August 11, 2025
Fiserv, Inc.
600 N. Vel R. Phillips Avenue
Milwaukee, Wisconsin 53203
Ladies and Gentlemen:
In connection with the registration under the Securities Act of 1933 (the “Act”) of $1,000,000,000 aggregate principal amount of the 4.550% Senior Notes due 2031 (the “2031 Notes”) and $1,000,000,000 aggregate principal amount of the 5.250% Senior Notes due 2035 (the “2035 Notes” and, together with the 2031 Notes, the “Securities”) of Fiserv, Inc., a Wisconsin corporation (the “Company”), we, as your counsel, have examined such corporate records, certificates and other documents, and such questions of law, as we have considered necessary or appropriate for the purposes of this opinion.
Upon the basis of such examination, it is our opinion that the Securities constitute valid and legally binding obligations of the Company, subject to bankruptcy, insolvency, fraudulent transfer, reorganization, moratorium and similar laws of general applicability relating to or affecting creditors’ rights and to general equity principles.
In rendering the foregoing opinion, we are expressing no opinion as to Federal or state laws relating to fraudulent transfers and we are not passing upon, and assume no responsibility for, any disclosure in any registration statement or any related prospectus or other offering material relating to the offer and sale of the Securities.
The foregoing opinion is limited to the Federal laws of the United States and the laws of the States of Wisconsin and New York, and we are expressing no opinion as to the effect of the laws of any other jurisdiction.
We have relied as to certain factual matters on information obtained from public officials, officers of the Company and other sources believed by us to be responsible, and we have assumed that the Indenture, dated as of November 20, 2007, and the Thirty-Seventh Supplemental Indenture and the Thirty-Eighth Supplemental Indenture, each dated as of August 11, 2025, have been duly authorized, executed and delivered by the Trustee thereunder, an assumption which we have not independently verified.
We hereby consent to the filing of this opinion as an exhibit to the Registration Statement and to the references to us under the heading “Validity of the Notes” in the Prospectus Supplement relating to the Securities, dated August 4, 2025. In giving such consent, we do not thereby admit that we are in the category of persons whose consent is required under Section 7 of the Act.
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