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Federal Rules of Evidence – Rule 601 

(through July 14, 2022)

Crushed Rule

Almost anyone can be a witness.

Actual Rule

Every person is competent to be a witness unless these rules provide otherwise. But in a civil case, state law governs the witness’s competency regarding a claim or defense for which state law supplies the rule of decision.

Selected Committee Notes 

This general ground-clearing eliminates all grounds of incompetency not specifically recognized in the succeeding rules of this Article. Included among the grounds thus abolished are religious belief, conviction of crime, and connection with the litigation as a party or interested person or spouse of a party or interested person. With the exception of the so-called Dead Man’s Acts, American jurisdictions generally have ceased to recognize these grounds.

The Dead Man’s Acts are surviving traces of the common law disqualification of parties and interested persons. They exist in variety too great to convey conviction of their wisdom and effectiveness. These rules contain no provision of this kind. For the reasoning underlying the decision not to give effect to state statutes in diversity cases, see the Advisory Committee’s Note to Rule 501.

No mental or moral qualifications for testifying as a witness are specified. Standards of mental capacity have proved elusive in actual application. A leading commentator observes that few witnesses are disqualified on that ground. Weihofen, Testimonial Competence and Credibility, 34 Geo. Wash.L.Rev. 53 (1965). Discretion is regularly exercised in favor of allowing the testimony. A witness wholly without capacity is difficult to imagine. The question is one particularly suited to the jury as one of weight and credibility, subject to judicial authority to review the sufficiency of the evidence. 2 Wigmore §§501, 509. Standards of moral qualification in practice consist essentially of evaluating a person’s truthfulness in terms of his own answers about it. Their principal utility is in affording an opportunity on voir dire examination to impress upon the witness his moral duty. This result may, however, be accomplished more directly, and without haggling in terms of legal standards, by the manner of administering the oath or affirmation under Rule 603.

Admissibility of religious belief as a ground of impeachment is treated in Rule 610. Conviction of crime as a ground of impeachment is the subject of Rule 609. Marital relationship is the basis for privilege under Rule 505. Interest in the outcome of litigation and mental capacity are, of course, highly relevant to credibility and require no special treatment to render them admissible along with other matters bearing upon the perception, memory, and narration of witnesses.

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Key Rules (MBE/MEE)

• FRE 103 – Evidence Rulings
• FRE 104 – Preliminary Questions
• FRE 105 – Limiting How Evidence may be Used
• FRE 106 – Completeness Rule
• FRE 201 – Judicial Notice
• FRE 301 – Presumptions
• FRE 401 – Relevance
• FRE 402 – Irrelevant = Inadmissible
• FRE 403 – Excluding the Prejudicial, Confusing, etc.
• FRE 404 – Character Evidence
• FRE 405 – Proving Character
• FRE 406 – Habit, Routine
• FRE 407 – Subsequent Remedial Measures
• FRE 408 – Compromise Negotiations
• FRE 409 – Offers to Pay Expenses
• FRE 410 – Pleas, Related Statements
• FRE 411 – Liability Insurance
• FRE 412 – Victim’s Sexual Predisposition
• FRE 413, 414, 415 – Other Sex-Related Rules
• FRE 501 – Privilege in General
• FRE 502 – Attorney-Client Privilege, Work-Product Doctrine
• FRE 601 – Witness Competency
• FRE 602 – Personal Knowledge
• FRE 605 – Judge as Witness
• FRE 606 – Juror as Witness
• FRE 607 – Impeachment
• FRE 608 – Honest, Dishonest Character
• FRE 609 – Evidence of Criminal Conviction
• FRE 610 – Religious Beliefs
• FRE 611 – Mode, Order of Evidence
• FRE 612 – Recollection Refreshed
• FRE 613 – Prior Statements
• FRE 614 – Court Witness Examination
• FRE 615 – Excluding Witnesses
• FRE 701 – Non-Expert Opinion
• FRE 702 – Expert Opinion
• FRE 703 – Bases of Expert Opinion
• FRE 704 – Ultimate Issue
• FRE 705 – Disclosing Underlying Data
• FRE 801 – Hearsay Defined
• FRE 802 – Rule Against Hearsay
• FRE 803 – Strong Hearsay Exceptions
• FRE 804 – Weak Hearsay Exceptions
• FRE 805 – Double Hearsay
• FRE 806 – Impeaching Hearsay Declarants
• FRE 807 – Residual Hearsay Exception
• FRE 901 – Authentication, Identification
• FRE 902 – Self-Authenticating Evidence
• FRE 1001 – Original Defined
• FRE 1002 – Original Sometimes Required
• FRE 1003 – When Copies Generally Admissible
• FRE 1004 – Other Times Admissible
• FRE 1005 – Public Record Copies Often Admissible
• FRE 1006 – Summaries
• FRE 1007 – Acknowledged Content
• FRE 1008 – Functions of Court, Jury
• FRE 1101 – Rules’ Applicability