How to Enforce a Mediated Settlement Agreement in California When the Other Party Refuses to Sign After Mediation
In California, a mediated settlement agreement can often be enforced without a later signature if it meets Code of Civil Procedure § 664.6 or Evidence Code § 1123 requirements. Parties sometimes “shake hands” at mediation but later refuse to sign final papers, especially after counsel changes or business pressures arise. This article explains the fastest enforcement paths, the key drafting elements, and practical steps to obtain a court order entering judgment.
Why “We Settled at Mediation” Can Still Turn Into a Dispute
Mediation is designed to end litigation, but settlement friction often resurfaces after the session. A party may believe the agreement was “subject to” further approvals, may balk at a non-monetary term (confidentiality, non-disparagement, releases), or may simply experience buyer’s remorse once they see the settlement in writing.
California law provides multiple ways to enforce a mediated settlement agreement (often called an “MSA”), but the correct procedure depends on how the agreement was documented and whether the case is pending in court. The strongest enforcement route is typically a motion under Code of Civil Procedure section 664.6 to enter judgment under the settlement—if the settlement was properly formed and documented.
The Two Legal Questions That Control Enforcement
1) Is there an enforceable settlement contract?
Like any contract, a settlement must show mutual assent to material terms. Courts look for objective manifestations of agreement (the writing, signatures, statements on the record), not one party’s later claim that they “didn’t really agree.” If material terms were left open for future negotiation, enforcement becomes harder.
2) Is there a streamlined procedure to enforce it (or must you file a new lawsuit)?
When a civil action is pending, CCP § 664.6 can allow enforcement by motion, avoiding a separate breach-of-contract suit. If the case was dismissed without the court retaining jurisdiction, or the agreement doesn’t meet statutory requirements, you may need to reopen the case (if possible) or sue for breach and seek specific performance or damages.
Fastest Path: Enforcing the Settlement by Motion Under CCP § 664.6
CCP § 664.6 authorizes a court to enter judgment pursuant to the terms of a settlement if the settlement is either:
(a) in a writing signed by the parties outside court; or
(b) orally stipulated before the court.
This procedure is popular because it is relatively quick: you file a motion, present the settlement, and ask the judge to enter judgment on those terms. If granted, the settlement becomes a judgment that can be enforced like any other judgment (e.g., abstracts of judgment, levies, judgment debtor exams).
What “signed by the parties” means in practice
The safest reading is: signatures by the litigants themselves, not only their attorneys. If an individual refuses to sign the final “long-form” agreement after mediation, your best argument is that they already signed a binding “short-form” MSA or term sheet at mediation that contains the essential terms and expresses an intent to be bound.
For entity parties, ensure the person signing has authority (e.g., corporate officer, managing member) and that the signature block reflects that capacity. Authority disputes can derail enforcement.
Can you enforce if only counsel signed?
Relying solely on counsel’s signature is risky for CCP § 664.6 purposes. California courts often require the parties’ own signatures (or an oral stipulation on the record) because § 664.6 is a special statutory shortcut. If the agreement is otherwise a valid contract, you may still enforce it through ordinary contract remedies—but you may lose the speed advantages of § 664.6.
Practical example: enforceable vs. not enforceable under § 664.6
Enforceable: At mediation, both parties sign a 2-page term sheet stating payment amount, timing, mutual releases, dismissal with prejudice, confidentiality, and that “this agreement is intended to be binding and enforceable under CCP § 664.6.” One side later refuses to sign the 15-page formal settlement. The court can still enter judgment on the signed term sheet if it contains the material terms.
Problematic: Parties sign a memo that says “settlement to be drafted by counsel; release and confidentiality to be negotiated; payment amount TBD after insurance approval.” The court may find no meeting of the minds on material terms, making § 664.6 enforcement unlikely.
Mediation Confidentiality: The Evidence Code § 1123 Gatekeeper
Even if you have a signed writing, mediation confidentiality can prevent you from using it in court unless it satisfies an exception. Evidence Code sections 1119 and 1121 broadly protect mediation communications. Evidence Code § 1123 is the key statute that can allow a written settlement reached through mediation to be admitted and enforced.
How Evidence Code § 1123 affects enforcement
A settlement agreement prepared during mediation is not automatically admissible. To be admissible, it generally must include language (or otherwise clearly reflect) that it is enforceable or admissible, such as:
• “This agreement is admissible, enforceable, or binding,” or words to that effect; or
• “This agreement is subject to disclosure,” or “not confidential,” or similar terms.
Without appropriate § 1123 language, a party trying to enforce may be blocked from even introducing the MSA due to confidentiality rules—an outcome that surprises many litigants.
Drafting tip: include both § 1123 and § 664.6 language
To maximize enforceability, many practitioners include a clause stating that the MSA is: (1) intended to be binding and enforceable, (2) admissible for enforcement purposes notwithstanding mediation confidentiality, and (3) enforceable under CCP § 664.6. That won’t fix every issue, but it reduces the chance that confidentiality becomes a procedural trap.
Step-by-Step: What to Do When the Other Side Refuses to Sign After Mediation
1) Identify what document was actually executed at mediation
Gather the signed term sheet, handwritten deal points, or mediator-prepared settlement. Confirm the date, signatures, and whether it states it is binding/enforceable. If the parties only exchanged emails, texts, or draft language, evaluate whether there is a written agreement signed by the parties (including potential electronic signature issues) sufficient for § 664.6.
2) Confirm whether the lawsuit is still pending (or whether the court retained jurisdiction)
If the case is still open, § 664.6 is usually available. If the case has been dismissed, enforcement can be much more difficult unless the dismissal order retained jurisdiction to enforce the settlement. If the case is already dismissed without retained jurisdiction, you may be forced into a new action for breach of the settlement agreement.
3) Send a tight, record-friendly demand to perform
Before filing, send a written demand that the other side execute any “ministerial” documents and perform by a specific deadline. Attach the signed MSA and point out the enforcement clause. A clear demand can also support a request for fees or sanctions if the other side’s refusal is unreasonable under the settlement’s fee-shifting terms.
4) File a CCP § 664.6 motion (or petition), supported by competent declarations
A typical enforcement package includes:
• Notice of motion and motion to enter judgment under CCP § 664.6;
• Declaration authenticating the signed settlement and explaining nonperformance;
• The settlement agreement as an exhibit (ensuring Evidence Code § 1123 compliance);
• A proposed judgment that tracks the settlement terms;
• If needed, evidentiary objections and a reply addressing claimed ambiguities.
The judge’s job is to determine whether a settlement exists and to interpret and enforce it. If granted, the court may enter judgment according to the agreement’s terms, including specific performance obligations if sufficiently definite.
5) Be prepared for common defenses
The refusing party often argues one (or more) of these defenses:
• No meeting of the minds: “We agreed in principle but not on releases/confidentiality/tax terms.”
• Lack of authority: “The person at mediation couldn’t bind the company.”
• Mediation confidentiality: “You can’t use that document in court.”
• Conditions precedent not satisfied: “It depended on insurer approval, board approval, or lien resolution.”
• Fraud/duress/mistake: High bar, but commonly alleged.
Successful enforcement often turns on the quality of the written MSA: clarity, completeness on material terms, signatures, and explicit enforceability language.
When § 664.6 Is Not Available: Other Enforcement Options
1) Breach of contract lawsuit for specific performance or damages
If the settlement cannot be enforced by § 664.6 (for example, no party signatures, or the agreement is inadmissible under mediation confidentiality rules), the settlement may still be a contract. In that situation, the plaintiff typically files a separate action for breach of the settlement agreement and seeks:
• specific performance (an order compelling performance),
• damages (often the settlement amount or consequential damages), and
• attorney’s fees if the agreement includes a fee clause.
2) Motion practice tied to dismissal orders (retained jurisdiction)
Some settlements are implemented through a dismissal with the court retaining jurisdiction to enforce. If jurisdiction was properly retained, enforcement may proceed in the same case even post-dismissal, depending on the procedural posture and the language of the dismissal order.
3) Arbitration or other ADR mechanisms in the settlement
Many settlement agreements include dispute-resolution clauses requiring arbitration of disputes about interpretation or performance. If present, the enforcing party may need to initiate arbitration
