To file a complaint against a trustee, you bring a formal petition in the probate court that oversees the trust, alleging that the trustee breached a specific fiduciary duty and asking the judge for a defined remedy such as an accounting, removal, or money damages. It’s real litigation, with filing fees, service of process, discovery, and often mediation before trial. Almost everyone who goes this route hires a trust litigation attorney, and the steps below are what that process looks like from the beneficiary’s side.
Confirm You Have Standing
Not everyone connected to a trust can sue the trustee. The right generally belongs to qualified beneficiaries: anyone currently receiving or entitled to receive distributions, anyone who would receive distributions if the current beneficiaries’ interests ended, and anyone who would take property if the trust terminated today. Remainder beneficiaries fall in that last group.
Contingent beneficiaries can have standing too. A trustee owes the same duties to someone whose interest depends on a future event as to someone already receiving distributions, so if mismanagement threatens to drain the trust before your interest matures, you don’t have to wait it out.
One boundary matters here. While a trust is still revocable, the settlor typically holds the exclusive right to deal with the trustee. Beneficiaries usually gain standing to bring a breach-of-trust action only after the settlor dies or becomes incapacitated and the trust becomes irrevocable.
Check the Deadline Before You Do Anything Else
Waiting too long can permanently bar your claim even when the breach is obvious. The Uniform Trust Code creates two limitation windows, and most states follow the framework with some variation.
The shorter window opens when the trustee sends you a report that adequately discloses a potential breach and tells you how long you have to act. In many states, you have one year from receiving that report to file. Some states allow up to six months. The report doesn’t need to confess a breach; it just needs to contain enough information that a reasonable person would recognize the problem or know to ask questions. This is where a lot of claims die. A beneficiary receives an accounting, doesn’t read it carefully, and the clock runs out.
If no adequate report was ever sent, a longer backstop applies, typically five years from the trustee’s removal, resignation, or death, or from the termination of the trust or your interest, whichever comes first. Some states stretch this to six or ten years. These deadlines don’t apply to claims based on fraud or misrepresentation in the trustee’s reports.
The practical rule: read every accounting the trustee sends the day it arrives, and if something looks wrong, call an attorney that week. Filing a report away unread can start a countdown you don’t know about.
Identify the Specific Breach
A complaint has to allege a concrete violation of a fiduciary duty, not general dissatisfaction. Trustees owe duties of loyalty, prudence, and impartiality, and the strongest cases pin down which duty was broken and how.
Self-Dealing
The duty of loyalty requires the trustee to manage the trust solely for the beneficiaries. Any transaction where the trustee stands on both sides is presumptively voidable: buying trust property personally, selling their own assets to the trust, or steering trust business to a company they own. That presumption extends to deals with the trustee’s spouse, children, siblings, parents, or business entities where the trustee holds a significant interest. The trustee then bears the burden of proving the transaction was fair.
Investment Mismanagement
Under the prudent investor standard adopted in nearly every state, a trustee must invest the way a reasonable person would, considering the trust’s purposes, the beneficiaries’ needs, risk tolerance, tax consequences, and the portfolio as a whole. Concentration in a single speculative stock, ignoring diversification, or letting a trust-owned property deteriorate all qualify. A professional trustee such as a bank or trust company is held to a higher standard than a family member serving without compensation.
Failure to Inform or Account
Trustees must keep qualified beneficiaries reasonably informed. In most states, that means notifying beneficiaries when the trustee accepts the role, providing the relevant portions of the trust document on request, and sending at least an annual accounting showing assets, liabilities, income, expenses, and distributions. A trustee who goes silent, ignores requests, or sends vague reports is breaching this duty, and the silence itself becomes evidence.
Favoritism Among Beneficiaries
The duty of impartiality doesn’t require identical treatment; the trust terms may direct different distributions to different people. It does mean the trustee can’t prioritize one beneficiary over another in ways the document doesn’t authorize. Unjustified delays paying one beneficiary while promptly paying another, or investing exclusively for income when a remainder beneficiary needs growth, are common examples.
Send a Demand Letter First
Before filing, most attorneys send the trustee a formal demand letter. It isn’t legally required in most jurisdictions, but it does several things at once. It puts the trustee on written notice of the specific problem, it documents your attempt to resolve the issue short of court, and it sometimes works. A trustee who has been sloppy but not malicious may correct course when the legal consequences are spelled out on paper.
A useful demand letter names the duties the trustee has violated, cites the relevant trust provisions, and states clearly what you want: an accounting, a distribution, a change in investment strategy, or resignation. If the trustee ignores it or responds inadequately, that letter becomes Exhibit A in the petition.
Gather Your Evidence
Strong complaints are built on documents, not accusations. Start assembling the paper trail before you file.
The most important document is the complete trust instrument, including every amendment. This is the rulebook. It defines the trustee’s powers, spells out beneficiaries’ rights, sets the distribution schedule, and identifies any special instructions. Every allegation will be measured against what this document says the trustee was supposed to do.
Financial records come next. Collect every bank and brokerage statement for trust accounts you can obtain, along with any formal accountings the trustee has provided. A proper accounting shows beginning and ending balances, income received, expenses paid, investment gains and losses, and distributions made. Compare what the trustee reported against what you can verify independently. Gaps, unexplained withdrawals, and suspiciously round numbers are worth flagging for your attorney.
Build a chronological log of communications with the trustee. Save emails, letters, and texts. For phone calls, write down the date, what was discussed, and what the trustee committed to. Document every request you made and the trustee’s response or silence. A pattern of stonewalling is powerful evidence of bad faith.
File the Petition and Serve the Trustee
The formal complaint, usually called a petition in probate court, initiates the lawsuit. It identifies the trust, the trustee, and the beneficiaries; describes the specific acts or omissions constituting a breach; and states what relief you’re asking the court to grant. Specificity matters. “The trustee mismanaged the trust” is far weaker than “between January 2024 and March 2025, the trustee withdrew $47,000 from the trust account for personal expenses, as shown in the attached bank statements.”
File in the probate court with jurisdiction over the trust, typically the court in the county where the trust is administered. Filing requires a court fee that varies by jurisdiction, generally in the range of $200 to $500 or more depending on the type of petition. Some jurisdictions use variable fee schedules tied to the value of the trust assets.
Once the court accepts the filing, the petition must be formally served on the trustee and other interested parties, including other beneficiaries. Service of process is a constitutional requirement; a court cannot exercise authority over someone who has not been properly notified. Most attorneys hire a professional process server, whose fee usually runs between $45 and $75.
What Happens After Filing
The trustee has to file a written answer, usually within 20 to 30 days depending on local rules. The answer responds to each allegation and may raise defenses such as the statute of limitations or beneficiary consent. Trustees hire their own attorneys, and in many cases the trustee initially pays for that defense out of the trust itself.
The case then enters discovery, where both sides can demand evidence: written questions answered under oath, requests for documents, and depositions transcribed by a court reporter. Discovery is often where trust cases are won or lost, because the trustee is finally forced to produce records they may have been withholding. Accountings that were refused voluntarily now have to be handed over.
Many courts require mediation before setting a trial date. A neutral mediator works with both sides to negotiate a resolution, which might involve the trustee resigning, providing a complete accounting, making a lump-sum payment for losses, or some combination. Mediation is confidential, and any settlement becomes a binding agreement. A large share of trust disputes end here, because both sides want to avoid the cost and uncertainty of trial.
If mediation fails, the case proceeds to trial. Trust cases are typically decided by a judge rather than a jury. The judge reviews the evidence, hears testimony, and issues a ruling.
What the Court Can Order
Judges have broad discretion to fashion remedies when a breach is proven. The Uniform Trust Code, adopted in some form by a majority of states, gives courts a menu:
- Compel the trustee to do what the trust requires, such as making overdue distributions or providing an accounting.
- Enjoin specific future actions, such as selling a particular asset or making further withdrawals.
- Order money damages, called a surcharge, requiring the trustee to personally repay losses or disgorge profits gained through self-dealing.
- Appoint a special fiduciary to take temporary control of the trust while the case continues.
- Suspend or remove the trustee and appoint a successor.
- Reduce, deny, or claw back the trustee’s compensation.
- Void improper transactions and trace assets that were transferred to third parties.
Removal is the remedy beneficiaries request most often, but courts don’t grant it lightly. A judge will typically remove a trustee for a serious breach, a persistent failure to administer the trust effectively, or unfitness to serve. If all qualified beneficiaries agree on removal and a suitable successor is available, the case gets significantly stronger.
Cost and Who Ends Up Paying
Trust litigation is expensive. Attorney fees for contested cases that reach discovery and trial can easily run into five or six figures, and that reality often decides whether filing makes financial sense.
Under the Uniform Trust Code, a court can award costs and reasonable attorney fees to any party, paid either by another party or from the trust itself. A trustee who defends in good faith, even unsuccessfully, is generally entitled to reimbursement of legal expenses from the trust. But a trustee found to have committed a breach forfeits reimbursement for the matters where the breach was proven. In practice, that means a bad-faith trustee pays their own legal bills.
For beneficiaries, hourly billing is the norm, though some trust litigation attorneys will take contingency or hybrid arrangements when the claim involves clear financial losses. If you prevail, the court may order the trustee to pay your fees personally or direct payment from the trust. That possibility of fee-shifting is a real lever; it discourages frivolous defenses and helps compensate beneficiaries who had to sue to enforce their rights.
Read the No-Contest Clause Before You File
Some trust instruments include a no-contest clause, also called an in terrorem clause, that threatens to disinherit any beneficiary who challenges the trust or the trustee’s actions. Before you do anything else, check whether your trust has one, because the consequences of triggering it can wipe out your inheritance entirely.
Enforcement varies widely. A growing number of states refuse to enforce these clauses against beneficiaries who challenge a fiduciary’s conduct, reasoning that discouraging oversight of trustees violates public policy. Others decline to enforce the clause if the beneficiary had probable cause, meaning a reasonable person would believe the challenge had a substantial likelihood of success. Not every state offers these protections, though, and getting the analysis wrong is catastrophic. If your trust has a no-contest clause, this is the single most important issue to work through with your attorney before filing anything.