“For settlement purposes only” is a useful signal, but it does not create automatic confidentiality or make every enclosed document inadmissible. Federal Rule of Evidence 408 restricts specified uses of compromise offers and negotiation statements about a disputed claim. It generally prevents using them to prove or disprove the claim’s validity or amount, or to impeach by a prior inconsistent statement or contradiction. [1]
Rules that determine the answer
Confidentiality and admissibility are separate questions. A court protective order can restrict use or disclosure of discovery, but it requires an appropriate legal basis; the parties’ desire for secrecy does not automatically seal material filed with a court. A confidentiality agreement, mediation privilege, or court rule may supply additional protection in a particular setting. Those protections must be identified independently rather than assumed from a Rule 408 label. [2]
Rule 408 allows evidence offered for another proper purpose, such as showing bias, rebutting a claim of undue delay, or proving an effort to obstruct a criminal investigation. It also contains an exception concerning statements in negotiations over a public office’s regulatory, investigative, or enforcement claim when later offered in a criminal case. [1] The rule does not say all settlement material is privileged or undiscoverable. A specific privilege may change the analysis, and federal Rule 408 does not automatically govern a state-court proceeding.
What to do next
- Identify the disputed claim and whether liability or amount was actually disputed when the communication occurred.
- State the settlement purpose accurately, while separating negotiation proposals from ordinary business correspondence or unrelated factual reporting.
- Check applicable mediation rules, confidentiality agreements, protective orders, and state evidence law before sharing sensitive information.
- Preserve the communication and underlying records. If evidence is offered in litigation, evaluate the purpose for which it is offered rather than assuming the caption answers admissibility.
Practical example
A customer disputes a $40,000 invoice and offers $22,000 to settle it. Rule 408 may restrict using that offer as proof of the amount owed. But attaching a pre-existing delivery receipt does not automatically immunize the receipt from independent discovery. And calling an unrelated threat a settlement communication does not necessarily protect the threat.
For related situations, see Rule 68 offers of judgment and Vaughn indexes in FOIA litigation.
Primary sources
- Federal Rules of Evidence: Rule 408, compromise offers and negotiations
- Federal Judicial Center: Confidential Discovery and protective orders
Sources checked: October 31, 2026.