Exhibit 5.1

Tel +1.214.220.7700 Fax +1.214.999.7716

June 7, 2021

MoneyGram International, Inc.

2828 N. Harwood Street, 15^th Floor

Dallas, Texas 75201

Ladies and Gentlemen:

We have acted as counsel to MoneyGram International, Inc., a Delaware corporation (the “Company”), with respect to certain legal matters in connection with the offer and sale from time to time (the “Offering”) by the Company of shares of the Company’s common stock, par value $0.01 per share (the “Securities”), with an aggregate sales price of up to $100.0 million, which may be offered and sold from time to time pursuant to the ATM Equity Offering^SM Sales Agreement, dated as of June 7, 2021 (the “Equity Sales Agreement”), between the Company and BofA Securities, Inc., as sales agent (the “Sales Agent”), a copy of which is being filed with the Securities and Exchange Commission (the “Commission”) as an exhibit to the Company’s Current Report on Form 8-K filed on or about the date hereof. The Securities will be offered for sale pursuant to a prospectus supplement dated June 7, 2021 (the “Prospectus Supplement”), that will be filed with the Commission pursuant to Rule 424(b)(5) on or after June 7, 2021, to a prospectus dated April 8, 2021 (as amended and supplemented by the Prospectus Supplement, the “Prospectus”) that constitutes a part of the Company’s Registration Statement on Form S-3 (Registration No. 333-255122), filed with the Commission on April 8, 2021 (the “Registration Statement”), which Registration Statement became automatically effective upon filing.

In rendering the opinions set forth below, we have reviewed (i) the Equity Sales Agreement; (ii) the Registration Statement; (iii) the Prospectus Supplement; (iv) the Prospectus; (v) the Amended and Restated Certificate of Incorporation of the Company, as amended; (vi) the Amended and Restated Bylaws of the Company, as amended; (vii) resolutions (the “Resolutions”) adopted by the Board of Directors of the Company relating to the Registration Statement, the Offering, the Equity Sales Agreement and related matters, including those resolutions authorizing each of the Chief Executive Officer, the Chief Financial Officer, the General Counsel, Corporate Secretary and Chief Administrative Officer of the Company and any other officer of the Company designated by any of the foregoing officers (the “Authorized Officers”) to, among other things, effect sales under the Equity Sales Agreement; (viii) resolutions adopted by the Board of Directors of MoneyGram International Payment Systems, Inc., a Delaware corporation, MoneyGram Payment Systems Inc., a Delaware corporation, and MoneyGram Payment Systems Worldwide, Inc., a Delaware corporation (collectively, the “Subsidiaries”), relating to the Registration Statement; and (ix) such other certificates, statutes and other instruments and documents as we considered appropriate for purposes of the opinions hereafter expressed. In addition, we have reviewed such questions of law as we considered appropriate. As to matters of fact relevant to the opinions expressed below, and as to factual matters arising in connection with our review of corporate documents, records and other documents and writings, we have relied upon certificates and other communications of corporate officers of the Company and the Subsidiaries, without further investigation as to the facts set forth therein.

		June 7, 2021 Page 2

For purposes of rendering the opinions set forth below, we have made the following assumptions:

Based on the foregoing, and subject to the assumptions, qualifications, limitations and exceptions set forth herein, we are of the opinion that the Securities to be issued and sold by the Company as contemplated by the Equity Sales Agreement have been duly authorized for issuance and, upon approval of the terms of any sale of Securities pursuant to the Equity Sales Agreement by an Authorized Officer pursuant to the Resolutions and payment and delivery in accordance with the Equity Sales Agreement, the Prospectus Supplement and the Prospectus, will be validly issued, fully paid and non-assessable.

The foregoing opinions are limited in all respects to the Delaware General Corporation Law (including the applicable provisions of the Delaware Constitution and the reported judicial decisions interpreting these laws) and the federal laws of the United States of America as in effect on the date hereof, and we undertake no duty to update or supplement the foregoing opinions to reflect any facts or circumstances that may hereafter come to our attention or to reflect any changes in any law that may hereafter occur or become effective. We express no opinion as to the effect of the laws of any other jurisdiction, domestic or foreign, or to any matter other than as expressly set forth above, and no opinion on any other matter may be inferred or implied herefrom.

We hereby consent to the filing of this opinion as an exhibit to the Company’s Current Report on Form 8-K, to be filed on or about the date hereof, and to the use of our name in the Prospectus forming a part of the Registration Statement under the caption “Legal Matters.” By giving such consent, we do not admit that we are within the category of persons whose consent is required under Section 7 of the Securities Act or the rules and regulations of the Commission thereunder.