To sue a trust in California, you file a petition in the probate division of the Superior Court under Probate Code Section 17200, and you name the trustee as the respondent rather than the trust itself. The trustee is the one managing the assets and making decisions, so the trustee is the party answerable in court. The statute gives beneficiaries and trustees the right to bring the court into any dispute over a trust’s internal affairs, from a single questionable transaction to a challenge that would void the trust document entirely.1California Legislative Information. California Probate Code 17200 – Proceedings Concerning Trusts Deadlines are strict, and the shortest one runs only 120 days.
Who Can Bring a Petition
Standing comes from your relationship to the trust. Current beneficiaries and heirs of the person who created the trust (the settlor) can petition under Section 17200. Co-trustees can petition against each other. The trustee can petition for instructions from the court.
Disinherited beneficiaries can file too. In Barefoot v. Jennings, the California Supreme Court held that a person cut out by a trust amendment still has standing in probate court to challenge that amendment on grounds like fraud, undue influence, or lack of capacity.2FindLaw. Barefoot v. Jennings If the challenge succeeds and the prior version of the trust named you, you have a claim.
Creditors sit in a narrower lane. Property held in a settlor’s revocable trust at death is reachable by the settlor’s creditors if the probate estate cannot cover the debts.3California Legislative Information. California Probate Code 19001 – Payment of Claims, Debts, and Expenses From Revocable Trust But being a creditor on its own does not give you standing under Section 17200 to petition over how the trust is run.
Check the Deadlines Before Anything Else
The limitation period that applies depends on what you are suing about. Figure out which clock is running on your claim before you spend time on anything else.
120 Days to Contest a Trust After the Settlor’s Death
Once a revocable trust becomes irrevocable because the settlor has died, the trustee must send a written notification to beneficiaries and heirs under Probate Code Section 16061.7. That notice carries a bold-print warning about the contest deadline.4California Legislative Information. California Probate Code 16061.7 – Trustee Notification Requirements You have 120 days from the date that notice is served to file a contest challenging the trust’s validity. If a copy of the trust is mailed to you during that window, the deadline extends to 60 days from the day you receive the trust, whichever is later.5California Legislative Information. California Probate Code 16061.8 Miss it and a contest based on incapacity, undue influence, or fraud is permanently barred. This is the most commonly missed deadline in trust litigation.
Three Years for Breach of Trust
Claims that the trustee mismanaged the trust follow Probate Code Section 16460. You have three years from the date you receive a written account or report that adequately discloses the facts giving rise to the claim. “Adequately discloses” means enough information was there that you knew or should have investigated. If no adequate report ever comes, the three years run from when you actually discovered the breach or reasonably should have.
One Year for Most Creditor Claims
A creditor of a deceased settlor generally has one year from the date of death to pursue claims against trust assets under Code of Civil Procedure Section 366.2.6California Legislative Information. California Code of Civil Procedure 366.2 – Limitations on Actions Against Decedent If the trustee publishes notice to creditors, the window compresses to four months from publication, or 60 days from direct notice to known creditors, whichever is later.
Grounds for Filing
Trust lawsuits either attack how the trustee is behaving or attack the trust document itself. The right petition names the specific legal problem and ties it to concrete evidence.
Breach of Fiduciary Duty
Trustees owe beneficiaries a duty of loyalty (no self-dealing, no favoritism outside the trust’s terms) and a duty of care (manage the assets the way a prudent person would). Breach can look like reckless investing, using trust funds personally, refusing required distributions, or steering benefits to one beneficiary without authority to do so. Section 17200 lets the court order “redress of a breach of the trust by any available remedy,” which gives judges wide latitude to repair the damage.1California Legislative Information. California Probate Code 17200 – Proceedings Concerning Trusts
Trust Contests
A contest challenges the validity of the trust document (or an amendment) rather than how it is being administered. The usual grounds are lack of capacity, undue influence, and fraud.
Lack of capacity means the settlor did not understand what they were signing. Medical records, testimony from people who saw the settlor at the time, and physician or neuropsychologist opinions are the usual evidence.
Undue influence means someone pressured or manipulated the settlor into a disposition that reflected the influencer’s wishes, not the settlor’s own. Courts weigh the settlor’s vulnerability, the influencer’s authority or position of trust, suspicious tactics such as isolating the settlor or controlling access to legal advice, and whether the result departs sharply from prior estate plans. When the alleged influencer had a confidential relationship with the settlor, actively helped prepare the trust, and received a substantial benefit, the court may presume undue influence and shift the burden to the other side.
Fraud covers forged signatures and trusts procured by deception.
Petition for Accounting
Beneficiaries have a right to know what the trustee is doing with the money. Section 16062 requires a trustee to provide a written accounting at least once a year to each beneficiary who is currently receiving distributions or could receive them at the trustee’s discretion.7California Legislative Information. California Probate Code 16062 The trust can waive that duty and a beneficiary can waive it in writing, but a court can still compel an accounting if there is reason to believe a material breach has occurred.8California Legislative Information. California Probate Code 16064 – Exceptions to Trustee Accounting Duty To petition for one, the trustee must have failed to respond within 60 days of your written request and have provided no accounting in the six months before your request.1California Legislative Information. California Probate Code 17200 – Proceedings Concerning Trusts
Petition to Remove a Trustee
When the trustee should no longer serve, a settlor, co-trustee, or beneficiary can petition for removal under Section 15642. Grounds listed in the statute include breach of trust, insolvency or other unfitness, hostility or inability to cooperate with co-trustees that impairs administration, failure or refusal to act, excessive compensation, and substantial inability to manage finances or resist fraud and undue influence. A catch-all permits removal “for other good cause.”9California Legislative Information. California Probate Code 15642 – Resignation and Removal of Trustees Removal is easier to win on a documented pattern than a single mistake; isolated negligence alone is not enough to show unfitness when the trustee also holds power to revoke the trust.
Read the No-Contest Clause First
Many trusts contain a no-contest clause (sometimes called an in terrorem clause) that disinherits any beneficiary who challenges the trust. If you are already in the trust and have something to lose, read this clause before you file anything.
California limits how far these clauses reach. Under Probate Code Section 21311, a no-contest clause is only enforceable against a direct contest brought without probable cause.10California Legislative Information. California Probate Code 21311 – No Contest Clauses Probable cause means the facts you know at the time of filing would lead a reasonable person to believe there is a realistic chance the court will grant relief. Challenges to a property transfer on the ground that the property did not belong to the settlor, and creditor claims against the trust, can also trigger a no-contest clause, but only if the clause expressly says so.
If you misjudge probable cause, you can forfeit your entire share. This is where sitting down with a trust litigation attorney before filing pays for itself.
Gather Your Evidence
Trust petitions win on documents, not allegations. Pull together whatever you can:
- The trust agreement and every amendment.
- The Section 16061.7 notice you received after the settlor died, along with the envelope or any delivery confirmation. The receipt date starts the 120-day clock.4California Legislative Information. California Probate Code 16061.7 – Trustee Notification Requirements
- Financial records: accountings, bank statements, investment reports, appraisals, inventories.
- Written communications with the trustee. Emails and letters build a timeline and show whether the trustee has been responsive or evasive.
- Claim-specific proof. For capacity, the settlor’s medical records from when the document was signed. For misconduct, records of suspicious transactions. For undue influence, evidence of isolation and the influencer’s role in drafting.
If the trustee refuses to produce documents you are entitled to, that refusal itself supports your petition. Section 17200 authorizes the court to compel both trust terms and financial information.1California Legislative Information. California Probate Code 17200 – Proceedings Concerning Trusts
Where and How to File
Trust petitions go to the probate division of the California Superior Court in the county where the trust is principally administered. Section 17002 defines that as where the day-to-day activity of the trust takes place. If that location is unclear, the default is the trustee’s residence or usual place of business. With multiple co-trustees, it is any co-trustee’s residence or place of business as they agree, or if they cannot, any of them.11California Legislative Information. California Probate Code 17002 – Principal Place of Administration
The petition identifies the parties, lays out the facts, states the legal basis for jurisdiction, and specifies exactly what you want the court to do: remove the trustee, compel an accounting, order a distribution, invalidate the trust or a particular amendment, or something else. As of January 2026, the statewide filing fee for a trust petition under Section 17200 is $435, with possible county surcharges on top.12California Courts. Statewide Civil Fee Schedule Effective January 1, 2026 A fee waiver is available if you cannot afford it.
After filing, you must have the trustee served with a copy of the petition and the court-issued summons. Someone other than you has to physically deliver it, typically a professional process server or the sheriff’s office. The trustee then has a set period to respond, and the court sets an initial hearing.
What the Court Can Order If You Win
Remedies depend on what you proved. For breach of fiduciary duty, the usual order is a surcharge: the trustee personally pays back the loss. When investments were mismanaged, the surcharge is often calculated against what the trust would have been worth under prudent management. The court can also order specific property returned.
Bad-faith conduct carries sharper penalties. Under Probate Code Section 859, anyone who wrongfully takes, conceals, or disposes of trust property in bad faith is liable for twice the value of the property recovered, and the court may award reasonable attorney fees on top of that.13California Legislative Information. California Probate Code 859 – Bad Faith Taking of Trust Property With the underlying restitution, the total exposure can reach three times the value of the misappropriated assets.
A successful contest invalidates the trust or the challenged amendment, which puts a prior version back in control or sends the assets through the settlor’s estate. A successful removal petition gets a successor trustee appointed and can require the removed trustee to cooperate with the transition.
Who Pays Attorney Fees
The default rule is that each side pays its own lawyer. California carves out exceptions when someone acts in bad faith. Under Section 17211, if a beneficiary objects to a trustee’s accounting in bad faith and without reasonable cause, the beneficiary can be ordered to pay the trustee’s fees. If the trustee’s opposition to a legitimate objection was itself in bad faith and without reasonable cause, the trustee can be ordered to pay the beneficiary’s fees from the trustee’s own compensation or personal assets.14California Legislative Information. California Probate Code 17211 Section 859 also lets the court award fees when trust property has been wrongfully taken or concealed in bad faith.13California Legislative Information. California Probate Code 859 – Bad Faith Taking of Trust Property Both sides have reason to be careful: frivolous petitions can cost the petitioner, and stonewalling legitimate ones can cost the trustee.