Can a Beneficiary Sue the Trustee

Harvey discovered his mother’s Will had a glaring error—the trustee he’d named was also a beneficiary, receiving a substantial share of the estate. Now, his siblings are questioning every decision the trustee makes, and Harvey fears a costly legal battle will deplete the estate before anyone sees a dime. What rights does a beneficiary have when they suspect a trustee is acting improperly, and what’s the threshold for actually filing a lawsuit?

As an estate planning attorney and CPA with over 35 years of experience, I frequently counsel clients on navigating these complex trustee-beneficiary relationships. The potential for conflict is high, and it’s critical to understand the grounds for a lawsuit and the potential outcomes.

What Constitutes Trustee Misconduct?

A beneficiary can sue a trustee for various breaches of fiduciary duty. These aren’t simply disagreements over strategy; they require evidence of actual wrongdoing. Some common grounds for litigation include:

• Self-Dealing: The trustee personally profiting from the trust at the expense of the beneficiaries. This might include using trust assets for personal expenses, purchasing property from the trust at below-market value, or favoring themselves in distributions.
• Conflict of Interest: As in Harvey’s case, serving as both trustee and beneficiary creates an inherent conflict. While not automatically invalidating the trust, it subjects the trustee to heightened scrutiny and a presumption of impropriety.
• Failure to Impartially Administer: A trustee must treat all beneficiaries fairly. Favoritism, discrimination, or unequal treatment can be grounds for legal action.
• Breach of the Prudent Investor Rule: Trustees have a duty to invest trust assets with the same care, skill, and caution as a prudent investor. Excessive risk-taking or failing to diversify investments can lead to liability.
• Failure to Account: Trustees must maintain accurate records of all trust transactions and provide beneficiaries with regular accountings.
• Misappropriation of Funds: This is the most serious breach – outright theft or embezzlement of trust assets.

What is the Standard of Proof?

Simply suspecting misconduct isn’t enough. A beneficiary must present credible evidence to support their claims. The standard of proof varies depending on the allegation. Generally, for breaches of fiduciary duty, beneficiaries must demonstrate that the trustee failed to act in good faith or with reasonable prudence. If fraud or intentional misconduct is alleged, a higher standard of “clear and convincing evidence” may apply.

What Remedies are Available?

If a beneficiary prevails in a lawsuit against the trustee, several remedies are available. These can include:

• Surcharge: The trustee may be ordered to reimburse the trust for any losses caused by their misconduct.
• Removal: A court can remove a trustee who has breached their duties and appoint a successor.
• Injunction: A court can order the trustee to stop engaging in certain actions.
• Accounting: The court can compel the trustee to provide a detailed accounting of all trust transactions.
• Disgorgement: The trustee may be required to forfeit any profits they made as a result of their misconduct.

It’s crucial to remember that litigation is expensive and time-consuming. Before filing a lawsuit, beneficiaries should carefully weigh the potential costs and benefits. A strong case, solid evidence, and a clear understanding of the law are essential.

What About Beneficiary Witnesses & Harmless Error?

As a CPA, I see a lot of estate plans. A common issue arises when a beneficiary also serves as a witness to the Will. California Probate Code § 6112 stipulates that an ‘interested witness’ (a beneficiary) triggers a legal presumption of duress or fraud. Unless there are two other disinterested witnesses, the beneficiary may lose their gift, taking only what they would have received under intestacy rules. Furthermore, even if there are errors in the execution of a Will, Probate Code § 6110(c)(2) allows the court to validate it if there is ‘clear and convincing evidence’ of the testator’s intent; however, this requires a costly court petition and is not a guaranteed safety net.

The CPA Advantage: Step-Up in Basis & Valuation

Often overlooked in these disputes is the tax impact. As a CPA, I advise clients that proper trust administration is critical for maximizing the “step-up in basis” of assets. This means that inherited assets are valued at fair market value as of the date of death, potentially eliminating capital gains taxes on future sales. A contentious trustee, or one who mishandles assets, could jeopardize this significant tax benefit. Proper valuation is also key, and a qualified CPA can provide expert support.

What if a Will is Invalidated?

If a Will is invalidated, assets fall under intestacy; however, for deaths on or after April 1, 2025, estates with personal property under $208,850 (per CPC § 13100) may still bypass full probate via affidavit. This simplified process isn’t available for larger estates and doesn’t address potential conflicts over the distribution of assets. While California allowed temporary remote witnessing during the pandemic, the law (CPC § 6110) has reverted to requiring strict simultaneous presence; remote signatures are generally invalid for Wills unless they meet the narrow ‘Electronic Will’ standards of AB 298.

Legal & Tax Disclosure: Steve Bliss is an Estate Planning Attorney and CPA providing legal and tax advice. This information is for general guidance only and does not constitute legal or tax advice. The law is subject to change and varies by jurisdiction. You should consult with a qualified professional before making any decisions about your estate plan. Steve Bliss is licensed to practice law in California. CPA license details available upon request.

What makes a California will legally enforceable when it matters most?

In California, a last will and testament is reviewed under probate standards that focus on intent, capacity, and execution. Clear drafting reduces ambiguity, limits misinterpretation, and helps families avoid unnecessary conflict during estate administration.

• Planning: Review future needs regularly.
• Validation: Check statutory rules.
• People: Update testator details.

For California residents, understanding how intent, authority, and compliance interact is one of the most effective ways to protect family harmony and estate integrity. A will that anticipates probate scrutiny is far more likely to be honored as written and far less likely to become the source of unnecessary conflict.

Resources for Legal Standards & Probate Procedure

• Riverside Local Rules: Riverside Superior Court – Probate Division
  Access the essential “Local Rules” (Title 7) effective January 1, 2026. This includes mandatory usage of the eSubmit Document Submission Portal, current Probate Examiner notes, and specific requirements for remote appearances via the court’s designated platform.
• Attorney Verification: State Bar of California
  The official regulatory body for California attorneys. Use this to verify a lawyer’s “Certified Specialist” status in Estate Planning or to access 2026 guidelines on the ethical handling of Client Trust Accounts (IOLTA).
• Self-Help & Forms: California Courts – Wills, Estates, and Probate
  The Judicial Council’s official portal. It includes the updated 2026 forms for the $208,850 personal property threshold and the $750,000 “Primary Residence” simplified transfer procedure (AB 2016).
• Federal Estate Tax Exemption: IRS Estate Tax Guidelines
  The authoritative federal resource for estate and gift tax filing. It reflects the permanent exemption of $15 million per individual (effective Jan 1, 2026), replacing the previously scheduled Tax Cuts and Jobs Act (TCJA) sunset.