Title 31Money and FinanceRelease 119-73

§3731 False claims procedure

Title 31 › Subtitle SUBTITLE III— - FINANCIAL MANAGEMENT › Chapter CHAPTER 37— - CLAIMS › Subchapter SUBCHAPTER III— - CLAIMS AGAINST THE UNITED STATES GOVERNMENT › § 3731

Last updated Apr 6, 2026|Official source

Summary

A court order that tells a witness to come to a trial or hearing in a false-claims lawsuit can be served anywhere in the United States. A private false-claims lawsuit must be filed no later than 6 years after the false act, or within 3 years after a responsible U.S. official knew or should have known the important facts, but in any case no more than 10 years after the false act. If the government joins the case, it can file or change the complaint and its claims will count as filed on the original plaintiff’s date for time-limit rules, but only for claims from the same conduct. In these cases the United States must prove every important part of the claim, including the amount of harm, by a preponderance of the evidence (more likely than not). If the government won a related criminal fraud or false-statement case (by trial verdict or a guilty/no-contest plea), the defendant cannot deny the essential parts of that crime in the related civil suit.

Full Legal Text

Title 31, §3731

Money and Finance — Source: USLM XML via OLRC

(a)A subpena requiring the attendance of a witness at a trial or hearing conducted under section 3730 of this title may be served at any place in the United States.
(b)A civil action under section 3730 may not be brought—
(1)more than 6 years after the date on which the violation of section 3729 is committed, or
(2)more than 3 years after the date when facts material to the right of action are known or reasonably should have been known by the official of the United States charged with responsibility to act in the circumstances, but in no event more than 10 years after the date on which the violation is committed,
(c)If the Government elects to intervene and proceed with an action brought under 3730(b),11 So in original. Probably should be preceded by “section”. the Government may file its own complaint or amend the complaint of a person who has brought an action under section 3730(b) to clarify or add detail to the claims in which the Government is intervening and to add any additional claims with respect to which the Government contends it is entitled to relief. For statute of limitations purposes, any such Government pleading shall relate back to the filing date of the complaint of the person who originally brought the action, to the extent that the claim of the Government arises out of the conduct, transactions, or occurrences set forth, or attempted to be set forth, in the prior complaint of that person.
(d)In any action brought under section 3730, the United States shall be required to prove all essential elements of the cause of action, including damages, by a preponderance of the evidence.
(e)Notwithstanding any other provision of law, the Federal Rules of Criminal Procedure, or the Federal Rules of Evidence, a final judgment rendered in favor of the United States in any criminal proceeding charging fraud or false statements, whether upon a verdict after trial or upon a plea of guilty or nolo contendere, shall estop the defendant from denying the essential elements of the offense in any action which involves the same transaction as in the criminal proceeding and which is brought under subsection (a) or (b) of section 3730.

Legislative History

Notes & Related Subsidiaries

Historical and Revision Notes

Revised SectionSource (U.S. Code)Source (Statutes at Large) 3731(a)31:232(F).R.S. § 3491(F); added Nov. 2, 1978, Pub. L. 95–582, § 1, 92 Stat. 2479. 3731(b)31:235.R.S. § 3494. In subsection (b), the words “A civil action under section 3730 of this title” are substituted for “Every such suit” for clarity.

Editorial Notes

References in Text

The Federal Rules of Criminal Procedure, referred to in subsec. (e), are set out in the Appendix to Title 18, Crimes and Criminal Procedure. The Federal Rules of Evidence, referred to in subsec. (e), are set out in the Appendix to Title 28, Judiciary and Judicial Procedure.

Amendments

2009—Subsecs. (c) to (e). Pub. L. 111–21, which directed amendment of section “3731(b)” of this title by adding subsec. (c) and redesignating former subsecs. (c) and (d) as (d) and (e), respectively, was executed by making the amendment to this section, to reflect the probable intent of Congress. 1986—Subsecs. (b) to (d). Pub. L. 99–562 added subsecs. (b) to (d) and struck out former subsec. (b) which read as follows: “A civil action under section 3730 of this title must be brought within 6 years from the date the violation is committed.”

Statutory Notes and Related Subsidiaries

Effective Date

of 2009 AmendmentAmendment by Pub. L. 111–21 effective
May 20, 2009, and applicable to conduct on or after
May 20, 2009, except that this section, as amended by Pub. L. 111–21, applicable to cases pending on
May 20, 2009, see section 4(f) of Pub. L. 111–21, set out as a note under section 3729 of this title.

Reference

Citations & Metadata

Citation

31 U.S.C. § 3731

Title 31Money and Finance

Last Updated

Apr 6, 2026

Release point: 119-73