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How to contest a trust in California
The short answer
To contest a California trust you file a petition in the superior court of the county administering the trust, stating a legal ground the court recognises — undue influence, lack of capacity, fraud, forgery, duress, or mistake. In most cases you have 120 days from the date the trustee sends you the notice required by Probate Code §16061.7, or 60 days from receiving a copy of the trust, whichever is later.
Who can contest a trust?
A person with standing — generally a beneficiary named in the trust, a beneficiary of an earlier version of the trust, or an heir who would inherit if the trust or the amendment were set aside. Being unhappy with the distribution is not, on its own, standing. The threshold question is whether the outcome of the contest would change what you receive.
A trustee is not a contestant. A trustee facing a contest is a respondent, and has separate duties to the trust and to the beneficiaries while the matter is pending.
What grounds does the petition have to allege?
A contest is not an appeal against a result. It is an allegation that the instrument, or a specific amendment to it, is legally defective. The most common grounds in California trust litigation:
Undue influence Welf. & Inst. §15610.70
Excessive persuasion that overcame the settlor's free will and produced an inequitable result. The statute directs the court to weigh the settlor's vulnerability, the influencer's apparent authority, the tactics used, and the equity of the outcome.
Lack of capacity Prob. Code §§810–812
California starts from a presumption of capacity. A contest on this ground turns on specific evidence of the settlor's mental function at the time the document was signed, not on a general diagnosis.
Fraud or forgery
The settlor was deceived about what they were signing, or the signature is not theirs. Forgery cases usually turn on document examination and on the circumstances of the signing.
Duress, menace, or mistake
Coercion, threats, or a drafting error that means the document does not say what the settlor intended. A mistake claim may be brought as a reformation petition rather than a contest.
How long do you have?
Deadline
120 days from the date the trustee serves the notification required by Probate Code §16061.7, or 60 days from the date you are actually given a copy of the trust, whichever is later. When that period closes, the contest is generally barred no matter how strong the underlying facts are.
If you have received an envelope from a trustee or a trustee's attorney and are not sure whether it started this clock, the date on the notice is the thing to look for first. Law last verified Aug 2026.
The five steps of a trust contest
STEP 1
Obtain the trust and the notice
A trustee who has sent a §16061.7 notification must give a beneficiary a copy of the trust on request. The instrument, its amendments, and the notice date are the starting documents.
STEP 2
Identify the ground and the evidence
Medical records, the drafting attorney's file, bank and title records, and the pattern of amendments over time. This is where a case is either built or abandoned.
STEP 3
File the petition before the deadline
Filed in the superior court for the county where the trust is administered, with notice to the trustee and to all beneficiaries.
STEP 4
Discovery, and often mediation
Depositions of the drafting attorney, the caregivers, and the family. Many California trust disputes resolve at mediation rather than at trial.
STEP 5
Trial, or a court-approved settlement
A trust contest is tried by the judge, not a jury. Where the parties settle, the court's approval is generally needed before distribution changes.
General California practice. Sequence and timing vary by county and by matter, and nothing here predicts a result in any particular case.
What if the trust has a no-contest clause?
A no-contest clause disinherits a beneficiary who challenges the instrument and loses. California enforces them, but narrowly: under Probate Code §21311 a direct contest brought with probable cause does not trigger the clause. Probable cause means the facts known to you at filing would cause a reasonable person to believe the contest is likely to succeed — a lower bar than winning, and a higher one than a suspicion.
Defined term
No-contest clause — trust or will language disinheriting a beneficiary who challenges the instrument and loses. Enforceable in California, subject to a probable-cause safe harbour.
If a deadline may be running
A Case Strategy Session is a paid, scheduled review of your documents and dates with an attorney who handles these matters. You leave with a written plan.
Related reading
General information about California law, not legal advice, and reading it does not create an attorney-client relationship. Consultations are paid. Responsible attorney: Jayson R. Elliott.