Also known as:forswear · forswears · forswore · forsworn · perjury · renunciation under oath
Written by attorneys · grounded in primary & secondary sources — see below
The act of repudiating or renouncing under oath. Perjury occurs when a person willfully makes a false statement under oath concerning a material matter in a judicial proceeding.
Sources & Authorities
How it applies
Common Examples
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Inconsistent Statement Excluded
Fumiko Fujimoto testified at trial that she never observed loose scaffolding. Counsel confronted her with a recorded interview in which she identified the safety manager as the person who overruled warnings. Because the interview was not given under penalty of perjury, the court excluded it as substantive evidence despite the inconsistency.
Bias Impeachment Allowed
Frederick Ferguson testified for the defense in a contract dispute. Opposing counsel cross-examined him about membership in an organization whose tenets required members to commit perjury for fellow members. The court permitted the questions to show bias even though the organization itself was not on trial.
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Cases
Statutes
Federal Rules
Uniform Acts
Model Codes
Common Law
Restatements
Dictionaries
Fernando Farrell sought to establish paternity. The laboratory submitted a genetic testing report signed under penalty of perjury by its designee. The court treated the report as self-authenticating and admitted it without further testimony from the lab technician.
Legal Impossibility Defense
Francesca Fowler was charged with attempt to suborn perjury after asking a witness to sign a false affidavit. Because the document would not have been material even if signed, the court held that true legal impossibility barred the attempt conviction.
Counsel Refuses Perjured Testimony
Fabian Flynn told his lawyer he intended to present a fabricated alibi at trial. The lawyer refused to call the witness, warned Flynn of the consequences, and prepared to disclose the perjury to the court if necessary. The court found no violation of the right to effective assistance.
Privilege Against Self-Incrimination
Francisco Frost refused to answer questions before a state grand jury about prior statements he had made under oath. The court upheld his invocation of the Fifth Amendment privilege, recognizing that the answers could expose him to perjury charges.
Malloy v. Hogan378 U.S. 1 (1964)
Common questions
Frequently Asked
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How does forswearing differ from ordinary false statements?+
Forswearing requires a false statement made willfully and corruptly under oath in a judicial proceeding concerning a material matter. Ordinary false statements lack the oath and judicial-proceeding elements.
Supporting sources
When may a prior inconsistent statement be admitted as substantive evidence rather than mere impeachment?+
The statement must have been given under penalty of perjury at a trial, hearing, other proceeding, or deposition and must be inconsistent with the declarant's current testimony.
Supporting sources
Does membership in certain organizations affect impeachment for bias?+
Yes. A witness may be impeached by showing bias through membership in an organization whose tenets require members to lie or commit perjury on behalf of fellow members.
Supporting sources
What makes a genetic testing report self-authenticating in parentage cases?+
The report must be in a record and signed under penalty of perjury by a designee of the testing laboratory.
Supporting sources
376 U.S. 254 (1964)Remedies
…"the struggle for the right-to-vote," and the legal defense of Dr. Martin Luther King, Jr., leader of the movement, against a perjury indictment then pending in Montgomery. The text appeared over the names of 64 persons, many widely known for their activities in public affairs, religion, trade unions, and the performing…