evidence

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.

Notes

(Pub. L. 93–595, §1, Jan. 2, 1975, 88 Stat. 1934; Apr. 26, 2011, eff. Dec. 1, 2011.)

Notes of Advisory Committee on Proposed Rules

A witness may testify to a matter only if evidence is introduced sufficient to support a finding that the witness has personal knowledge of the matter. Evidence to prove personal knowledge may consist of the witness’s own testimony. This rule does not apply to a witness’s expert testimony under Rule 703.

Notes

(Pub. L. 93–595, §1, Jan. 2, 1975, 88 Stat. 1934; Mar. 2, 1987, eff. Oct. 1, 1987; Apr. 25, 1988, eff. Nov. 1, 1988; Apr. 26, 2011, eff. Dec. 1, 2011.)

Before testifying, a witness must give an oath or affirmation to testify truthfully. It must be in a form designed to impress that duty on the witness’s conscience.

Notes

(Pub. L. 93–595, §1, Jan. 2, 1975, 88 Stat. 1934; Mar. 2, 1987, eff. Oct. 1, 1987; Apr. 26, 2011, eff. Dec. 1, 2011.)

Notes of Advisory Committee on Proposed Rules

An interpreter must be qualified and must give an oath or affirmation to make a true translation.

Notes

(Pub. L. 93–595, §1, Jan. 2, 1975, 88 Stat. 1934; Mar. 2, 1987, eff. Oct. 1, 1987; Apr. 26, 2011, eff. Dec. 1, 2011.)

Notes of Advisory Committee on Proposed Rules

Any party, including the party that called the witness, may attack the witness’s credibility.

Notes

(Pub. L. 93–595, §1, Jan. 2, 1975, 88 Stat. 1934; Mar. 2, 1987, eff. Oct. 1, 1987; Apr. 26, 2011, eff. Dec. 1, 2011.)

Notes of Advisory Committee on Proposed Rules

(a) In General. The following rules apply to attacking a witness’s character for truthfulness by evidence of a criminal conviction:

(1) for a crime that, in the convicting jurisdiction, was punishable by death or by imprisonment for more than one year, the evidence:

(A) must be admitted, subject to Rule 403, in a civil case or in a criminal case in which the witness is not a defendant; and

Evidence of a witness’s religious beliefs or opinions is not admissible to attack or support the witness’s credibility.

Notes

(Pub. L. 93–595, §1, Jan. 2, 1975, 88 Stat. 1936; Mar. 2, 1987, eff. Oct. 1, 1987; Apr. 26, 2011, eff. Dec. 1, 2011.)

Notes of Advisory Committee on Proposed Rules

(a) Control by the Court; Purposes. The court should exercise reasonable control over the mode and order of examining witnesses and presenting evidence so as to:

(1) make those procedures effective for determining the truth;

(2) avoid wasting time; and

(3) protect witnesses from harassment or undue embarrassment.

(a) Scope. This rule gives an adverse party certain options when a witness uses a writing to refresh memory:

(1) while testifying; or

(2) before testifying, if the court decides that justice requires the party to have those options.

If a witness is not testifying as an expert, testimony in the form of an opinion is limited to one that is:

(a) rationally based on the witness’s perception;

(b) helpful to clearly understanding the witness’s testimony or to determining a fact in issue; and

(c) not based on scientific, technical, or other specialized knowledge within the scope of Rule 702.