Us Code § 431 - Contracts by Member of Congress

Full text of Us Code United States Code § 431 — Contracts by Member of Congress, with citation guidance and answers to common questions.

§ 431. Contracts by Member of Congress

Whoever, being a Member of or Delegate to Congress, or a Resident Commissioner, either before or after he has qualified, directly or indirectly, himself, or by any other person in trust for him, or for his use or benefit, or on his account, undertakes, executes, holds, or enjoys, in whole or in part, any contract or agreement, made or entered into in behalf of the United States or any agency thereof, by any officer or person authorized to make contracts on its behalf, shall be fined under this title.

All contracts or agreements made in violation of this section shall be void; and whenever any sum of money is advanced by the United States or any agency thereof, in consideration of any such contract or agreement, it shall forthwith be repaid; and in case of failure or refusal to repay the same when demanded by the proper officer of the department or agency under whose authority such contract or agreement shall have been made or entered into, suit shall at once be brought against the person so failing or refusing and his sureties for the recovery of the money so advanced.

(June 25, 1948, ch. 645, 62 Stat. 702; Oct. 31, 1951, ch. 655, §19, 65 Stat. 717; Pub. L. 103–322, title XXXIII, §330016(1)(J), Sept. 13, 1994, 108 Stat. 2147.)

Historical and Revision Notes

Based on title 18, U.S.C., 1940 ed., §204 (Mar. 4, 1909, ch. 321, §114, 35 Stat. 1109).

Word "agency" was inserted in three places to eliminate any ambiguity as to scope of section. (See definition of department or agency under section 6 of this title.)

Minor changes were made in phraseology.


Editorial Notes

Amendments

1994—Pub. L. 103–322 substituted "fined under this title" for "fined not more than $3,000" in first par.

1951—Act Oct. 31, 1951, struck out "; exceptions", after "Congress" in section catchline.

About This Section

18 U.S.C. § 431 is part of Title 18 of the United States Code. The United States Code is the official codification of federal statutes maintained by the Office of the Law Revision Counsel of the U.S. House of Representatives. Congress amends the Code through new public laws, which are eventually incorporated into the relevant title.

This section may be cited in legal writing as 18 U.S.C. § 431. For the most current official text, including any recent amendments, use the official source links below. Do not rely on this page as the sole authority for legal citation or litigation.

How to Read This Statute

Statutes are organized by title, chapter, section, and subsection. Pay attention to words like "shall," "may," "and," and "or," because they determine whether a requirement is mandatory or permissive and whether multiple conditions must all be met. Historical notes and amendments often appear at the end of a section.

Using This Page

This page is intended for research and educational use. Lawyers, students, journalists, and compliance professionals can use it as a starting point, but should always verify the current text through an official government source before relying on it for legal advice, filings, or compliance decisions.

Sources

Source: official Us Code text · Last verified 2026-08-27

Frequently Asked Questions About Us Code § 431

What does United States Code § 431 cover?

Section 431 ("Contracts by Member of Congress") is part of the United States Code, the codified statutory law of Us Code. It sets out the legal rule or procedure described in the text above. Statutes are amended regularly, so always verify against the official source.

How do I cite Us Code § 431?

A common citation format is "United States Code § 431" (Us Code). Legal writing may require the code abbreviation, section number, and year or edition. Match the style required by your court, professor, or publisher.

Is this the official text of Us Code law?

No. This page is for research and education and may not include the most recent amendments. For official current law, check the Us Code official source linked on this page or consult a licensed Us Code attorney.

How does Us Code § 431 apply to my situation?

Statutes are interpreted in context, and application depends on your specific facts. Only a licensed attorney in Us Code can advise on how this section applies to you. Contact your state or local bar association for a referral.

Sources & Verification

Not legal advice. Verify against the official source and consult a licensed attorney in Us Code.