18 U.S.C. § 1623 – False Declarations Before a Grand Jury or Court
Section 1623 zeroes in on false statements made under oath in federal court and grand jury proceedings.
What this statute covers.
This provision criminalizes knowingly making a false material declaration under oath in any proceeding before, or ancillary to, a federal court or grand jury. It also applies to submitting or using documents or other materials that contain a knowingly false material statement.
Unlike general perjury statutes, § 1623 is tailored specifically to judicial and grand jury settings, including proceedings connected to the Foreign Intelligence Surveillance Court.
Materiality and knowledge.
To secure a conviction, the government must prove:
- The statement was made under oath (or under penalty of perjury)
- The declaration was material to the proceeding
- The defendant knew the statement was false when made
The statute applies whether the conduct occurred inside or outside the United States.
Inconsistent statements rule.
Section 1623 allows prosecutors to charge perjury based on irreconcilably contradictory declarations. The government does not need to prove which statement was false if:
- Both statements were material
- Both were made within the statute of limitations
A defense exists if the defendant believed each statement was true at the time it was made.
Safe harbor for prompt correction.
A person who admits a false declaration during the same continuous proceeding may avoid prosecution if the false statement has not substantially affected the proceeding and its falsity has not yet become apparent.
Penalties.
- Up to 5 years in prison
- Up to 10 years if the matter involves FISA court proceedings
- Fines under Title 18
Why § 1623 matters.
This statute is frequently used in grand jury investigations and high-stakes federal cases because it lowers some traditional perjury hurdles and gives prosecutors flexibility when testimony evolves or conflicts.
If federal investigators are scrutinizing sworn testimony or inconsistent statements, the exposure can extend quickly. Call (314) 900-HELP or contact our federal criminal defense attorneys to discuss how false declaration charges are evaluated and defended.
