# Trust Contest: Definition and How It Works in California

> A trust contest is a court challenge to a trust's validity, usually claiming lack of capacity, undue influence, or fraud.

Source: https://ridleylawoffices.com/estate-planning-glossary-california/trust-contest/

By Eric Ridley, attorney, Ridley Law. Updated September 2026.

A **trust contest** is a court challenge to a trust’s validity, usually claiming the settlor lacked capacity, was subject to undue influence or fraud, or that the document was forged or improperly amended.

## How it works in California

A trust contest differs from a will contest in timing and process, since a trust rarely goes through probate court the way a will does. [The differences between contesting a trust and contesting a will](https://ridleylawoffices.com/trust-contest-vs-will-contest-california/) shape which deadlines and which court apply.

The deadline is tight. Under Prob. Code, § 16061.8, a beneficiary or heir who receives the trustee’s notice generally cannot bring a contest more than 120 days after that notice is served, or 60 days after receiving a copy of the trust terms, whichever comes later.

A no-contest clause can also discourage a challenge, since Prob. Code, § 21311 lets a trust disinherit a beneficiary who brings certain contests without probable cause. Anyone considering a challenge should understand [how to contest a trust in California](https://ridleylawoffices.com/how-to-contest-a-trust-california/) before the deadline runs.

## Why it matters

For example, an heir who suspects a late amendment was signed under pressure has a limited window to act. Missing the 120-day or 60-day deadline can end the challenge before a court ever looks at the merits.

## Common mistakes

People wait to gather more proof before filing, and the deadline passes while they are still collecting documents. Others contest a trust that has a no-contest clause without weighing whether they have probable cause, which can cost them a gift they would otherwise have received.

## Related terms

- [No-Contest Clause](https://ridleylawoffices.com/estate-planning-glossary-california/no-contest-clause/): the provision that can penalize a beneficiary who brings a losing contest.
- [Testamentary Capacity](https://ridleylawoffices.com/estate-planning-glossary-california/testamentary-capacity/): one of the most common grounds for a trust contest.
- [Trustee Removal](https://ridleylawoffices.com/estate-planning-glossary-california/trustee-removal/): a separate remedy aimed at the trustee rather than the document.
- [Undue Influence](https://ridleylawoffices.com/estate-planning-glossary-california/undue-influence/): the other most common ground for challenging a trust.
- [Will Contest](https://ridleylawoffices.com/estate-planning-glossary-california/will-contest/): a court challenge to the validity of a will.

Part of the [California estate planning glossary](https://ridleylawoffices.com/estate-planning-glossary-california/). For the full treatment, see [Trust Contest vs. Will Contest: California Difference](https://ridleylawoffices.com/trust-contest-vs-will-contest-california/).