Does a disclosure mean the mediator has a conflict?

Not necessarily. A disclosure reports a fact that might bear on impartiality; whether it amounts to a disqualifying conflict is decided under the governing rule. In the Northern District of California's ADR program, some circumstances require disqualification that the parties cannot waive, while others are disclosed and the neutral can serve unless a timely objection succeeds. Whether a specific fact disqualifies a mediator is a question for counsel and the program.

Can parties agree to keep a mediator who disclosed a conflict?

Sometimes, depending on the rule. The Northern District of California's ADR rule states that parties may not waive a basis for disqualification described in 28 U.S.C. section 455(b), and California's rule 3.855(f) requires a mediator to decline or withdraw, regardless of the parties' consent, if impartiality cannot be maintained. Other grounds may be waivable. Whether keeping a mediator is wise in a particular case is a question for a licensed attorney.

Does a mediator's duty to disclose end after the first session?

Under California's rules for court-connected civil mediation it does not. Rule 3.855(b)(2) calls the duty to disclose a continuing obligation that runs from the inception of the mediation process through its completion, and says disclosures should be made as soon as practicable after the mediator becomes aware of the matter. Other programs set their own timing, so the governing rule for the case should be checked directly.

Dispute Options

Mediator Conflict of Interest Disclosure: How to Read One

Q: Who decides an objection to a mediator?

It depends on the program. In the Northern District of California's ADR program, the ADR Director determines whether a proposed neutral will serve or whether another neutral should be appointed, with a further route to the ADR Magistrate Judge. In other courts or private engagements the decision may rest with the mediator, a judge or a program administrator. The governing rule names the decision-maker, and counsel can confirm how it applies.

The Legal Storyboard · Updated 2026-10-15 · 6 min read

Mediator Conflict of Interest Disclosure: How to Read One

AbstractA mediator conflict of interest disclosure is the statement in which a neutral reveals relationships, interests or facts that could reasonably raise a question about impartiality. Disclosing a fact is not admitting a conflict, and it does not by itself disqualify the mediator. The governing program's rule decides what follows: which grounds cannot be waived, how and when an objection is raised, and who decides. Rules vary by court and jurisdiction; a specific situation belongs with a licensed attorney.

Contents

What is a mediator conflict of interest disclosure?
Are disclosure, impartiality and disqualification the same thing?
How does one named court program handle it?
Why does a statute about judges appear in a mediation rule?
How does a state court program frame the same duty?
What should a reader identify in the governing policy?
What does a disclosure not settle?
Sources

What is a mediator conflict of interest disclosure?

A mediator conflict of interest disclosure is the statement in which a neutral reveals relationships, interests or facts that could reasonably raise a question about their impartiality. A disclosure is not an admission of a conflict, and a disclosed fact does not by itself disqualify anyone. What happens next depends on the governing program's rule: which grounds are mandatory, which can be waived, who decides, and how an objection must be raised.

This article is general legal education, not legal advice. Mediation rules vary by court, by state and by country, and anyone weighing a specific disclosure should take it to a licensed attorney or to the program's own ADR office.

Are disclosure, impartiality and disqualification the same thing?

No. They are three separate ideas.

Impartiality is the underlying duty: the mediator does not favour any side. California's rules for court-connected mediators state it directly: "A mediator must maintain impartiality toward all participants in the mediation process at all times" (Cal. Rules of Court, rule 3.855).
Disclosure is the procedure that protects the duty. The mediator tells the parties about matters that might bear on it, so the parties are not the last to know.
Disqualification is an outcome. Some facts bar a neutral from serving whatever the parties prefer; others allow service if nobody objects in time.

A reader of a disclosure is usually asking the third question while holding a document that answers only the second.

How does one named court program handle it?

The mediation program of the U.S. District Court for the Northern District of California separates the categories cleanly. Under ADR Local Rule 6-3(a), the court's ADR Unit appoints a mediator "from the Court's panel," and ADR L.R. 2-5(d), headed "Disqualification of Neutrals," governs conflicts (N.D. Cal. ADR Local Rules). It works in four steps.

The standards. ADR L.R. 2-5(d)(1) bars anyone from serving as a neutral in a Court ADR program in violation of "the standards set forth in 28 U.S.C. § 455," of any applicable standard of professional responsibility or rule of professional conduct, or of other guidelines the Court adopts on disqualifying neutrals.

Mandatory grounds. Under ADR L.R. 2-5(d)(2), "Mandatory Disqualification and Notice of Recusal," a prospective neutral who discovers a circumstance requiring disqualification "must immediately notify the parties and the ADR Unit in writing." The same paragraph states: "The parties may not waive a basis for disqualification that is described in 28 U.S.C. Section 455 (b)."

Non-mandatory grounds. ADR L.R. 2-5(d)(3), "Disclosure and Waiver of Non-Mandatory Grounds for Disqualification," covers a circumstance that would not compel disqualification "but that might be covered by § 455 (a)." Here the neutral "shall promptly disclose that circumstance to all counsel in writing, as well as the ADR Unit." A party with a conflict-based objection must present it in writing within a short period set by the rule, or the party "shall be deemed to have waived objection."

Who decides. For objections, ADR L.R. 2-5(d)(4) provides that "The ADR Director shall determine whether the proposed neutral will serve or whether another neutral should be appointed," with a further route to the ADR Magistrate Judge.

In this program, then, a disclosure sorts a fact into a non-waivable category or a waivable one, and the waivable category runs on a clock. The deadlines are in the current rule text; anyone in a pending case should read them there and confirm them with counsel.

Why does a statute about judges appear in a mediation rule?

Because the program borrows it as a yardstick. Section 455 governs disqualifying federal judges. Subsection (a) provides that a judge "shall disqualify himself in any proceeding in which his impartiality might reasonably be questioned." Subsection (b) lists specific circumstances, beginning with "a personal bias or prejudice concerning a party, or personal knowledge of disputed evidentiary facts concerning the proceeding" (28 U.S.C. § 455).

The two subsections behave differently on waiver. Section 455(e) states: "No justice, judge, or magistrate judge shall accept from the parties to the proceeding a waiver of any ground for disqualification enumerated in subsection (b)." The Northern District's ADR rule mirrors that split: subsection (b) grounds cannot be waived by the parties, while circumstances that only might fall under subsection (a) are disclosed and are waived if no timely objection is made. Whether a given fact falls under (a), (b) or neither is a legal judgement for the program and counsel, not something a reader should settle from a disclosure letter.

How does a state court program frame the same duty?

Differently, which is why the governing rule matters more than any general description. California's rules apply to mediators who have agreed to be on a superior court's list or panel for general civil cases, or who mediate such a case after being "recommended, selected, or appointed by that court or will be compensated by that court" (Cal. Rules of Court, rule 3.851). Rule 3.851 also excludes judges, and settlement conferences under rule 3.1380, a different process covered in Settlement Conference vs Mediation.

Under rule 3.855(b)(1), a mediator "must make reasonable efforts to keep informed about matters that reasonably could raise a question about his or her ability to conduct the proceedings impartially, and must disclose these matters to the parties." Those matters include "Past, present, and currently expected interests, relationships, and affiliations of a personal, professional, or financial nature," and any grounds for disqualifying a judge under Code of Civil Procedure section 170.1.

Rule 3.855(b)(2) makes the duty ongoing: "A mediator's duty to disclose is a continuing obligation, from the inception of the mediation process through its completion." Subdivisions (c) through (e) describe what happens when parties raise no objection, raise a concern, or object, and the outcome of an objection differs between two-party and multi-party mediations. Subdivision (f) sets the floor: "Regardless of the consent of the parties," a mediator must decline or withdraw if the mediator "cannot maintain impartiality toward all participants in the mediation process," or if proceeding "would jeopardize the integrity of the court or of the mediation process."

Mediations outside a court program often refer instead to the Model Standards of Conduct for Mediators, associated with the American Arbitration Association, the American Bar Association and the Association for Conflict Resolution, and revised by a joint committee in 2005 (Resolution Systems Institute). Whether they bind a particular mediator depends on that mediator's agreement and program.

What should a reader identify in the governing policy?

The aim is to locate the answers, not to supply them. Five questions cover most programs:

Which rule governs? A federal court program, a state court panel and a private engagement may each use a different text. The broader map of processes is in Alternative Dispute Resolution Processes.
What must be disclosed, and to whom? Note whether disclosure goes to the parties, to counsel, to a program office, or to all of them, and whether the duty continues after the first session.
Which grounds are non-waivable? Look for language such as "regardless of the consent of the parties" or "may not waive."
How is an objection raised, and by when? Find the method and timing in the current rule, not in a summary.
Who decides? In the Northern District program it is the ADR Director, with a route to the ADR Magistrate Judge; elsewhere it may be the mediator, a judge or a program administrator.

Disclosure rules written for arbitrators should not be assumed to apply to mediators; the roles differ, as set out in Mediation vs. Arbitration.

What does a disclosure not settle?

It does not decide whether a conflict exists, whether a party should object, or whether letting an objection lapse is wise. Those are questions about a specific matter, and they belong with a licensed attorney in the relevant jurisdiction, working from the current text of the rule that governs that case.