Colorado Rule of Evidence 408 prevents parties from using settlement offers, acceptances, or statements made during settlement negotiations as evidence at trial to prove liability for a claim, to prove a claim is invalid, or to prove the amount of a claim. The protection runs both ways: neither the party who made the offer nor the party who received it can turn that exchange into trial evidence against the other. The rule has real limits, though, and several exceptions let the same material in for other purposes.
What the Rule Keeps Out
Two categories of information fall within CRE 408. The first is the settlement conduct itself: furnishing or offering money or other consideration to resolve a claim, promising to do so, or accepting such an offer. The second is any statement or conduct that occurred during the negotiations around that offer.1Colorado Office of Respondent Parents’ Counsel. Colorado Rules of Evidence
The second category does most of the practical work. Sitting across from the other side, you may acknowledge certain facts, describe your version of events, or concede a weakness in your position. None of that can be offered at trial to prove liability or the value of the claim. Preliminary discussions, counteroffers, rejected proposals, and the final handshake terms all sit within the rule’s reach.
The rule also reaches third-party settlements. If a defendant settled with one plaintiff and later faces a separate lawsuit from someone else over the same incident, the second plaintiff generally cannot introduce that earlier settlement to prove fault.2Legal Information Institute. Federal Rules of Evidence Rule 408 – Compromise Offers and Negotiations
When the Rule Actually Applies
CRE 408 only engages when there is a genuine dispute about either the validity of the claim or the amount owed.1Colorado Office of Respondent Parents’ Counsel. Colorado Rules of Evidence This threshold is the piece most people miss. If you owe a clear, undisputed debt and simply try to negotiate a lower payoff, that conversation is not protected, because nothing is in dispute.
The dispute does not have to be formal. You do not need a filed lawsuit before the rule’s protections attach. But one side must genuinely contest liability, challenge the damages number, or at least signal disagreement with what is being demanded. Without that, the policy reason for protecting the discussion disappears, and so does the shield.
Exceptions That Let Settlement Evidence In
The rule is not an absolute bar. Settlement evidence is admissible when offered for a purpose other than proving liability or claim value. Colorado’s rule lists three examples, and courts treat the list as illustrative rather than exhaustive.1Colorado Office of Respondent Parents’ Counsel. Colorado Rules of Evidence
- Witness bias or prejudice. If a witness has a financial stake because of a prior deal with one of the parties, the other side can bring that up to challenge credibility.
- Rebutting a claim of undue delay. If one side accuses the other of dragging out litigation, evidence that settlement talks were underway during the allegedly delayed period can explain the timeline.
- Proving obstruction of a criminal investigation. The rule will not shield settlement discussions used to interfere with a criminal case.
Even when an exception applies, the evidence still has to survive Colorado’s Rule 403 balancing test. A judge will exclude otherwise admissible settlement evidence if its probative value is substantially outweighed by the risk of unfair prejudice, jury confusion, or misleading the fact-finder.1Colorado Office of Respondent Parents’ Counsel. Colorado Rules of Evidence Qualifying for an exception is not the same as getting the evidence admitted. The judge weighs how much the material actually proves against the danger that a jury will treat it as a backdoor inference of liability.
What the Rule Does Not Protect
Facts You Could Have Gotten Through Discovery
Colorado’s rule contains an “otherwise discoverable” provision that catches a lot of people off guard. Evidence that could have been obtained through normal discovery does not become off-limits just because it was mentioned during settlement talks.1Colorado Office of Respondent Parents’ Counsel. Colorado Rules of Evidence If a company hands over a damaging internal memo at the settlement table, the other side cannot tell the jury the memo surfaced during negotiations. But the memo itself remains available through a properly served document request and can come in on its own.
Walking into negotiations assuming everything shared becomes permanently hidden is a mistake. The rule protects the negotiation process. It does not protect the underlying facts.
Enforcing a Settlement You Already Reached
When parties actually reach a settlement and one side fails to honor it, CRE 408 does not block the other from proving the agreement exists. A dispute over whether a settlement was formed, and what its terms require, is not an attempt to prove liability on the underlying claim. The negotiations themselves are the relevant facts. Colorado courts generally allow this evidence because the purpose is contract enforcement, and a written settlement that a court approves becomes enforceable as a court order.
How Colorado’s Rule Differs From the Federal Rule
CRE 408 tracks the original Federal Rule of Evidence 408 but did not follow the federal amendments adopted in 2006. The differences can change outcomes in cases that involve both state and federal claims.
- Impeachment by prior inconsistent statement. The federal rule explicitly bars using settlement statements for this purpose. Colorado’s rule does not include that bar, which may give a Colorado court more room to admit a statement from settlement talks if the speaker later says something contradictory at trial.2Legal Information Institute. Federal Rules of Evidence Rule 408 – Compromise Offers and Negotiations
- Criminal cases involving government agencies. The federal rule allows statements made during negotiations with a government regulatory or enforcement agency to be used in a related criminal prosecution. Colorado’s rule contains no equivalent exception.2Legal Information Institute. Federal Rules of Evidence Rule 408 – Compromise Offers and Negotiations
- Otherwise discoverable evidence. Colorado kept the original language carving this out. The 2006 federal amendments removed it from FRE 408.
A statement protected in Colorado state court under CRE 408 may still be admissible in a related federal criminal case under the government-agency exception, and the reverse can be true as well.
Confidentiality Is a Separate Problem
Treating CRE 408 as a confidentiality rule is one of the most common misreadings of it. The rule controls what a judge or jury can consider at trial. It does not stop anyone from publicly disclosing what was said during settlement talks, sharing an offer with a reporter, or discussing terms with a business partner. If you want genuine confidentiality, you need a separate agreement.
A private confidentiality or non-disclosure agreement can fill those gaps by prohibiting public disclosure of negotiation details, restricting sharing with third parties, and creating contractual penalties for violations. Those protections operate as contract rights rather than evidence limits.
Colorado’s Mediation Privilege
Colorado adds a separate statutory layer when negotiations happen through mediation. Under Colorado’s mediation confidentiality statute, parties, mediators, and mediation organizations cannot voluntarily disclose, and cannot be compelled through discovery to disclose, any communication made during mediation.3Justia Law. Colorado Revised Statutes 13-22-307 This reaches further than CRE 408 because it covers discovery, not just trial admissibility. A mediation communication disclosed in violation of the statute is inadmissible in judicial or administrative proceedings.
The privilege has its own limits. It does not protect statements revealing an intent to commit a felony, cause bodily harm, or threaten a child’s safety. It also does not shield communications that state law requires to be public, or statements relevant to a claim of willful misconduct by the mediator.3Justia Law. Colorado Revised Statutes 13-22-307 For sensitive matters, running discussions through a formal mediation adds this statutory privilege on top of whatever CRE 408 already offers.
What This Means Going Into Negotiations
Knowing where the rule stops should shape how you handle settlement talks. CRE 408 protects what you say about liability and value, but it does not protect the underlying facts. If you plan to hand over documents, consider whether you are giving the other side something they could not otherwise get through discovery. If you are, and you want that fact kept out, get a written confidentiality agreement in place before the conversation starts.
Labeling communications “for settlement purposes only” or “without prejudice” is not required for CRE 408 to apply, but it creates a cleaner record that the discussion was part of compromise negotiations. When the line between ordinary business talk and settlement discussion is blurry, that label can carry weight in a later fight over admissibility.
And remember that the rule bars using settlement evidence to prove liability or claim value, not every possible use. If the negotiation could touch a criminal matter, or if a witness’s bias may later be at issue, the exceptions mean those statements can still reach the jury.