Can a Divorce Mediator Be Called to Testify?

Generally, no. If you and your spouse use private divorce mediation in California, the mediator generally cannot be called as a witness in a later civil case to describe what either of you said, offered or did in mediation. The law allows a few narrow exceptions, and the court's own child custody mediation follows different rules.

Most people facing this question are partway into a decision. They are thinking about sitting down with a spouse to work out custody, support, the house or retirement accounts. One worry keeps coming back: if mediation does not settle everything, could an honest offer or a hard admission come back in court? Some readers are already in mediation and want to know what the law actually protects before the next session. Others are reading on behalf of both spouses and want a clear picture they can share.

This article walks through the California rules that answer that worry. It covers the rule that keeps the mediator off the witness stand, the wider rule that keeps mediation talks out of evidence, the exceptions, and why the court's custody mediation in San Diego County works differently from private mediation.

The Short Answer: California Law Generally Bars a Mediator from Testifying

Evidence Code section 703.5 is the rule that keeps a mediator out of the witness box. It says that no mediator "shall be competent to testify, in any subsequent civil proceeding, as to any statement, conduct, decision, or ruling, occurring at or in conjunction with the prior proceeding." "Competent to testify" is a legal phrase. It means a person is allowed to take the stand as a witness at all. Under section 703.5, a mediator generally is not.

It helps to know what California means by mediation. Evidence Code section 1115(a) defines it as "a process in which a neutral person or persons facilitate communication between the disputants to assist them in reaching a mutually acceptable agreement." The mediator is neutral. The mediator helps you and your spouse talk and does not decide anything for either of you.

In plain terms, if your divorce later ends up in front of a judge, neither spouse can generally call the mediator to describe what the other said, what was offered on spousal support, or what was tentatively agreed about the house.

Section 703.5 is not limited to family law. It applies to mediators, arbitrators and judges in civil proceedings generally. That breadth reflects the reason for the rule. People tend to speak more openly when they know the person helping them will not later be asked to repeat their words against them. Candor is what makes agreement possible.

Mediation Confidentiality Under Evidence Code Section 1119

Keeping the mediator off the stand would mean little if the same words could come in another way. Evidence Code section 1119 closes that gap. Except as the Evidence Code's mediation chapter otherwise provides, section 1119 says that "no evidence of anything said or any admission made for the purpose of, in the course of, or pursuant to, a mediation or a mediation consultation is admissible or subject to discovery." It applies the same protection to writings prepared for mediation, and it adds that communications, negotiations and settlement discussions between participants in the course of mediation "shall remain confidential."

Two terms need a word of explanation. "Admissible" means a court may consider something as evidence. "Discovery" is the formal process in a lawsuit where each side can demand information from the other. Section 1119 shuts both doors in any arbitration, administrative adjudication, civil action or other noncriminal proceeding where testimony can be compelled.

The protection also reaches a "mediation consultation." Evidence Code section 1115(c) defines that as "a communication between a person and a mediator for the purpose of initiating, considering, or reconvening a mediation or retaining the mediator."

The two rules do different jobs:

• Section 703.5 bars the mediator as a witness.
• Section 1119 bars the communications and writings themselves as evidence.

Together they reinforce each other. Even if one spouse tried to call the mediator, the words being asked about would generally be inadmissible anyway. Even so, this confidentiality is not absolute. The mediation chapter has exceptions, and the next section covers the ones that matter most in a divorce. For a fuller treatment, see our guide to California mediation confidentiality.

When Confidentiality Has Limits: The Exceptions That Matter

Exceptions are often what spouses worry about most, because a rule with gaps can feel less reassuring. Knowing where the gaps are makes the protection easier to rely on.

Signed written settlement agreements. Evidence Code section 1123 says a written settlement agreement prepared in or under a mediation is not made inadmissible or protected from disclosure by the mediation chapter if it is signed by the settling parties and any one of these conditions is met:

• the agreement says it is admissible or subject to disclosure, or words to that effect;
• the agreement says it is enforceable or binding, or words to that effect;
• all parties expressly agree to its disclosure, in writing or orally as the Evidence Code permits; or
• the agreement is used to show fraud, duress or illegality relevant to an issue in dispute.

In practice, a signed agreement that says it is binding or enforceable can be admitted or disclosed. The negotiations that produced it stay protected under section 1119, and the mediator still generally cannot testify about how you got there. A mediated settlement agreement is therefore not always private and not always inadmissible.

The mediator's opinions. Evidence Code section 1121 adds a separate protection. Neither the mediator nor anyone else may submit to a court, and a court may not consider, "any report, assessment, evaluation, recommendation, or finding of any kind by the mediator" about a mediation the mediator conducted. There is one exception: a report required by court rule or other law that states only whether an agreement was reached. The bar also lifts if all parties expressly agree otherwise, in writing or orally as the Evidence Code allows. A private mediator's view of who was more reasonable generally does not reach the judge.

Section 703.5's own exceptions. The bar on mediator testimony has limits written into it. A mediator may testify about a statement or conduct that could:

• give rise to civil or criminal contempt;
• constitute a crime;
• be the subject of investigation by the State Bar or the Commission on Judicial Performance; or
• give rise to certain judicial disqualification proceedings, as section 703.5 specifies, though that exception is limited to the specific disqualification grounds the section identifies.

These are narrow. They do not allow a mediator to recount ordinary settlement talk about custody schedules or the division of a 401(k).

Child Custody Mediation Through the Court Is Different

Not every mediation in a California divorce is private. Family Code section 3160 requires each superior court to make a mediator available. Family Code section 3170(a) says that when a petition or other request for a custody or visitation order shows that custody, visitation or both are contested, "the court shall set the contested issues for mediation." That court mediation is required, not voluntary.

In San Diego County, the Superior Court of California, County of San Diego handles family law cases, and its custody mediation is child custody recommending counseling through the court's Family Court Services. Under Family Code section 3183(a), except as section 3188 provides, the court's mediator may, consistent with local court rules, submit a recommendation to the court on custody or visitation, if the mediator first gives the parties and their attorneys the recommendation in writing before the hearing. A mediator authorized to do this is called a "child custody recommending counselor." Family Court Services calls this person the Family Court Counselor. According to Family Court Services, if no agreement is reached, the counselor makes a recommendation and the court hearing proceeds. The judge decides.

The confidentiality rules also differ. Evidence Code section 1117(b)(1) says the Evidence Code's mediation chapter does not apply to a proceeding under Chapter 11 of Part 2 of Division 8 of the Family Code, which begins with section 3160. Section 703.5 also states that it does not apply to a mediator in those proceedings. Instead, Family Code section 3177 provides that court custody mediation "shall be held in private and shall be confidential."

Domestic violence cases are treated separately as well. Under Family Code section 3170(b), they are handled by Family Court Services under a separate written protocol approved by the Judicial Council. If you are in immediate danger, call 911.

Simple Divorce Mediation is a private practice and is not connected to the court, Family Court Services or any government program. Our article on private vs. court divorce mediation explains the differences in more detail.

What This Means for Couples Using Divorce Mediation

For spouses weighing whether to speak openly in a session, the combined effect of these rules is the practical point. Because Evidence Code sections 703.5 and 1119 work together, you and your spouse can generally talk through options, test ideas and make offers without those words being used as evidence if mediation does not end in a full agreement. That holds for in-person mediation in San Diego and for online divorce mediation anywhere in California, subject to the exceptions above.

The written agreement is different. When both spouses sign an agreement that says it is enforceable or binding, section 1123 allows it to be admitted into evidence or disclosed to the court. Mediation does not replace the financial disclosures California requires.

The mediator's role stays the same throughout. Under section 1115(a), the mediator is a neutral person who facilitates communication so you and your spouse can reach an agreement you both accept. The mediator does not represent either spouse, advocate for either spouse, or decide anything. Some readers ask what an attorney-mediator is. That is a mediator who is also licensed as a lawyer, but who stays neutral in the mediator role.

Either spouse may have a lawyer of their own. Outside a class or representative action, an attorney representing a spouse in mediation must, under Evidence Code section 1129, give the client a printed disclosure of the confidentiality restrictions and get a signed acknowledgment as soon as reasonably possible before the client agrees to participate, or soon after being retained if hired later. Our comparison of a divorce mediator vs. divorce lawyer explains how the two roles fit together.

Mediation may not be right for every couple. Where there has been domestic violence, coercion or a protective order, safety comes first, and no one should feel pressed to mediate with the other spouse. No mediation guarantees a result. What it offers is a confidential space, with defined limits, to work toward an agreement.

Scheduling a Mediation Consultation

Questions about confidentiality often come down to specifics, such as whether a mediation is private or part of the court's custody mediation, and whether a written agreement already states that it is binding. Simple Divorce Mediation serves couples in San Diego County and, online, anywhere in California.

To learn more about divorce mediation and schedule a joint consultation, call Simple Divorce Mediation at 858-330-1378.

About this article. Reviewed by Amy J. Lass, CA Bar No. 246779. Last updated 2026-10-08.