What are the Grounds to Contest a Trust

Emily just received a notice that her mother’s Trust is being finalized, but she’s convinced something isn’t right. Her mother, bless her heart, was increasingly susceptible to influence in the last few years, and Emily fears her new caregiver steered her into making changes that don’t reflect her true wishes. The cost of a full legal challenge, however, is daunting – potentially tens of thousands of dollars in attorney’s fees and court costs. As an Estate Planning Attorney and CPA with over 35 years of experience here in Escondido, I see situations like Emily’s all too often, and it’s critical to understand the specific grounds needed to successfully contest a Trust, and the potential financial implications.

What Evidence is Needed to Successfully Challenge a Trust?

Contesting a Trust isn’t simply about disagreeing with its provisions. It requires proving specific legal flaws. The burden of proof is high, and courts are generally reluctant to second-guess a validly executed Trust. Here are the most common grounds, and what it takes to establish them:

• Lack of Capacity: This alleges the grantor (the person creating the Trust) didn’t have the mental capacity to understand what they were doing when the Trust was signed or amended. This isn’t just about age; it’s about cognitive function. We need evidence of dementia, Alzheimer’s, or another condition impairing understanding. Medical records, testimony from doctors, and even evidence of unusual behavior around the time of signing are crucial.
• Undue Influence: This is what Emily suspects – that someone exerted excessive control over the grantor, overriding their free will. It’s more than just persuasion; it’s coercion. Showing that the caregiver isolated Emily’s mother, controlled access to information, or used manipulative tactics is essential.
• Fraud: This requires proving the Trust was based on false information. Perhaps someone misrepresented the tax implications, or concealed crucial assets. This is difficult to prove, as it requires demonstrating intent to deceive.
• Mistakes in Execution: While a seemingly minor error, improperly signed documents can invalidate a Trust. Probate Code § 6110(c)(2) dictates that the court may validate a signature-defective Will 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. Things like missing witnesses, or a signature not matching the grantor’s, can be grounds for challenge.

What Role Does a CPA Play in Trust Contests?

My dual background as an attorney and CPA provides a unique advantage in these cases. Often, Trust disputes involve complex financial issues. As a CPA, I can analyze account statements, identify hidden assets, and determine if transactions were unusual or indicative of undue influence. For example, a sudden large gift to the caregiver right before a Trust amendment would raise a red flag. Critically, determining the step-up in basis of assets and potential capital gains implications can be crucial in assessing whether the Trust provisions were financially sound, or if someone benefited unfairly. This valuation expertise is vital.

What About Challenges Based on Improper Amendment or Revocation?

Trusts can be amended or revoked, but those changes must be done correctly. A challenge can arise if the amendment wasn’t properly executed – for example, if it wasn’t signed with the same formalities as the original Trust. Similarly, if the grantor intended to revoke the Trust but failed to do so in writing, it could lead to a dispute. Probate Code § 8220 states that including a self-proving affidavit allows the Will to be admitted to probate without the testimony of the subscribing witnesses, significantly accelerating the court’s approval process.

What Happens if a Trust is Found Invalid?

If a court finds the Trust invalid, the grantor’s assets will be distributed according to California’s intestate succession laws – meaning the laws governing how property is divided when someone dies without a Will or Trust. If the Trust is partially invalidated, only the problematic provisions will be struck down, and the rest of the Trust will remain in effect. However, remember that 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.

What if the Trust Contains a “No Contest” Clause?

Many Trusts include a “no contest” clause, which penalizes anyone who challenges the Trust and loses. These clauses are enforceable in California, but there are exceptions. You can’t be penalized if you have probable cause to believe the challenge is valid. Proving probable cause requires a preliminary showing of evidence to the court.

How Has the Law Changed Regarding Remote Witnessing?

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. This makes ensuring proper in-person signing and witnessing more critical than ever.

• Important Note Regarding Digital Assets: RUFADAA 2.0 (SB 1458), effective 2025, California law (CPC § 871) was expanded to grant fiduciaries power over digital accounts; however, you must still grant explicit RUFADAA powers in your Will or Trust to bypass federal privacy blocks.

Finally, and importantly, California Probate Code § 6112 states 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.

How do California courts decide whether a will reflects true intent or creates ambiguity?

In California, a last will and testament operates within a probate system that emphasizes intent, clarity, and procedural compliance. When properly drafted, a will does more than distribute property—it creates legally enforceable instructions that guide courts, fiduciaries, and beneficiaries through administration with fewer disputes and less uncertainty.

To ensure the will functions as intended, the executor must understand their fiduciary obligations, while the family should be prepared for the probate process required to enforce the document.

When a will is drafted with California probate review in mind, it becomes a stabilizing roadmap rather than a source of conflict. Clear intent, proper authority, and compliant execution protect both families and estates.

Resources for Legal Standards & Probate Procedure

• Escondido Local Rules: San Diego Superior Court – Probate Division
  Access the essential “Local Rules” (Division IV) effective January 1, 2026. This includes mandatory e-filing procedures, current Probate Examiner notes, and Local Rule 4.4.5 regarding remote appearance requirements (via MS Teams) for non-evidentiary hearings.
• 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: IRS Estate Tax Guidelines
  The authoritative federal resource for estate and gift tax filing. It reflects the 2026 “OBBBA” permanent exemption of $15 million per individual, replacing the previously scheduled Tax Cuts and Jobs Act (TCJA) sunset.