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What to Do When a Trustee Breaches Their Fiduciary Duty in California

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Something already feels wrong. Distributions have stopped, calls go unreturned, or you’ve spotted a transaction that doesn’t add up. That instinct matters. Under California law, a trustee holds what courts describe as the highest standard of care known to law, and when that standard is violated, beneficiaries have real, legally enforceable options. At Gilfix & La Poll Associates LLP, we’ve spent over 35 years helping Bay Area families navigate trust disputes. We understand both the legal complexity and the personal weight these situations carry.

Trustee misconduct isn’t always dramatic. Sometimes it’s a sibling making loans to themselves from the trust. Sometimes it’s a professional institution that fails to invest prudently or stops sending accountings. The circumstances vary; the legal framework doesn’t. California’s Probate Code sets out exactly what trustees must do, what they can’t do, and what courts can order when they get it wrong.

What a Trustee’s Fiduciary Duty Actually Requires

California Probate Code Section 16000 establishes that a trustee must administer the trust according to both the trust instrument and California law. That obligation breaks down into several distinct duties, each with its own statutory source.

Duty of Loyalty
Section 16002 prohibits self-dealing: a trustee can’t put their own financial interests ahead of the trust’s. Section 16004(c) goes further, creating a presumption of violation whenever a trustee obtains any advantage from a transaction with a beneficiary during the trust’s existence. That burden shifts to the trustee to prove the transaction was fair.

Duty of Care & Prudent Investment
Section 16040, combined with the Prudent Investor Rule under Sections 16045 through 16054, requires trustees to invest trust assets as a reasonably prudent investor would, considering risk, return, diversification, and the trust’s specific purposes.

Duty of Impartiality
Section 16003 means a trustee can’t favor one beneficiary over another without authorization in the trust instrument.

Duty of Transparency
Section 16060 requires trustees to keep beneficiaries reasonably informed about the trust and its administration.

Common Signs a Trustee Is Breaching Their Duty

The most frequently litigated violations fall into a few recognizable categories. A breach doesn’t require bad intent. A trustee who makes careless investment decisions, fails to diversify a concentrated stock position, or neglects to send annual accountings can be held liable even without deliberate wrongdoing. These are the patterns that most often lead to trust litigation:

  • Self-dealing under Section 16004: The trustee buys trust assets at below-market prices, sells their own property to the trust at inflated values, or steers business opportunities to themselves.
  • Failure to account under Section 16062: The trustee refuses or repeatedly delays providing annual accountings, making it impossible for beneficiaries to evaluate how the trust is being managed.
  • Imprudent investment under Sections 16045 through 16054: The trustee fails to diversify, leaves assets in non-interest-bearing accounts, or makes speculative investments without authorization.
  • Favoritism among beneficiaries: Distributions go to one beneficiary while others are ignored, or the trustee systematically advantages one branch of the family.
  • Commingling funds under Section 16009: Trust funds are mixed with the trustee’s personal accounts. This is a standalone breach that also creates serious tracing problems if misappropriation is suspected.

Your First Steps When You Suspect a Breach

The steps you take in the early weeks shape both the strength of any eventual claim and how quickly you can resolve the problem. Some breaches can be corrected through a formal demand letter. Others require immediate court intervention to prevent assets from disappearing.

Request a Formal Accounting in Writing
Make a written demand for a formal trust accounting. Under Section 16062, trustees must provide accountings at least annually. A written demand creates a documented record of your request and starts the clock on certain statute of limitations periods for claims the accounting ultimately reveals. Don’t make this request informally over the phone.

Gather Records Now
Collect trust documents, bank statements, correspondence, and financial records before the trustee knows a dispute is developing. Once a trustee anticipates litigation, records become harder to obtain. If you have access to statements or transaction histories, preserve them immediately.

Assess Whether This Requires Court Action
Not every breach does. A well-crafted demand letter can resolve situations rooted in trustee inexperience or negligence, often faster and less expensively than litigation. But where assets are actively at risk of dissipation or the trustee is acting in bad faith, waiting for informal resolution can cause irreversible harm. In those situations, a petition for injunctive relief or the appointment of a temporary trustee may need to happen before any negotiation begins.

Remedies California Courts Can Order

California courts have broad authority to address trustee misconduct, and the remedies available go well beyond simply restoring what was lost.

Section 16440 establishes three measures of surcharge damages, and courts impose whichever fits the circumstances. The trustee may owe the actual losses the trust suffered plus interest, the profits they personally made through the breach plus interest, or the profits the trust would have earned had there been no breach at all. Critically, a trustee can owe money even if the trust suffered no net loss. If they profited from a self-dealing transaction while the trust broke even, that profit belongs to the trust under the disgorgement remedy.

Beyond surcharge, courts can order trustee removal under Section 15642, impose a constructive trust on commingled property, order recovery of trust assets transferred to third parties, and award attorney fees under Section 17211(b) when a trustee contested a petition in bad faith. Where the breach involved bad-faith wrongful taking, concealment, or disposal of trust property, Section 859 may authorize double damages (twice the value of the property recovered) on top of other remedies.

Deadlines That Govern Your Right to Act

California trust law involves multiple overlapping deadlines, and confusing them can cost a beneficiary their claims entirely.

Breach of fiduciary duty claims generally carry a four-year statute of limitations running from the date of discovery. Fraud-based claims run three years from discovery. Claims first revealed by a formal trust accounting run three years from the date you received that accounting. This is one reason the written demand for an accounting matters so much tactically. The 120-day deadline under Section 16061.7 operates on a completely separate track: it applies only to challenges to the trust’s validity, not to breach of fiduciary duty claims. A beneficiary who missed the window to contest the trust itself may still have fully viable claims for how the trustee managed or mismanaged it.

One practical detail worth knowing: trust litigation petitions for Santa Clara County are filed at the Downtown Superior Court at 191 North First Street in San Jose, where the Probate Division is located. The Palo Alto Courthouse at 270 Grant Avenue handles criminal and traffic matters only. Filing in the wrong location doesn’t just waste time. It can create procedural complications when deadlines are tight.

What a Well-Drafted Trust Could Have Prevented

Many of the disputes we see in trust litigation trace back to documents that didn’t anticipate conflict: no clear distribution standards, no trustee succession mechanism, no accountability provisions beyond what California law minimally requires. The Probate Code establishes a floor, not a ceiling. A trust drafted with careful attention to trustee powers, removal procedures, and dispute resolution mechanisms gives beneficiaries much stronger footing if something goes wrong. Having worked with families across generations in estate planning, we recognize how document language either prevents disputes or creates them.

Beneficiaries have more options than they often realize, and the fiduciary duty is a real, enforceable obligation with real consequences for trustees who violate it. If something about how a trust is being administered concerns you, we’re glad to talk through your options. Reach us at (650) 683-9200.