Rule 408.
Compromise Offers and Negotiations
(a)
Prohibited Uses.
Evidence of the following is not admissible—on behalf of any party—either to prove or disprove the validity or amount of a disputed claim or to impeach by a prior inconsistent statement or a contradiction:
(1) furnishing, promising, or offering—or accepting, promising to accept, or offering to accept—a valuable consideration in compromising or attempting to compromise the claim; and
(2) conduct or a statement made during compromise negotiations about the claim—except when offered in a criminal case and when the negotiations related to a claim by a public office in the exercise of its regulatory, investigative, or enforcement authority.
(b)
Exceptions.
The court may admit this evidence for another purpose, such as proving a witness’s bias or prejudice, negating a contention of undue delay, or proving an effort to obstruct a criminal investigation or prosecution.
(Pub. L. 93–595, § 1, Jan. 2, 1975, 88 Stat. 1933; Apr. 12, 2006, eff. Dec. 1, 2006; Apr. 26, 2011, eff. Dec. 1, 2011.)