Can Adult Children Challenge a Parent’s Trust in California?

In short, adult children can absolutely challenge a parent’s trust in California. However, the children must demonstrate sufficient legal grounds to succeed. Merely claiming the trust is unfair or unjust isn’t enough. Successfully challenging a trust can be incredibly difficult because probate courts generally presume that the trust documents accurately reflect the creator’s true wishes.

However, California law provides several legal mechanisms to challenge this presumption through trust litigation. Trust litigation gives disinherited children the chance to invalidate the trust. However, strictly enforced statutes of limitations apply.

If you want to challenge your parent’s trust or make your trust as ironclad as possible, contact Kushner Legal today to speak with an experienced Beverly Hills trust lawyer.

What Are the Legal Grounds to Challenge a Trust in California?

An adult child cannot contest a trust simply because they received a smaller financial share than they subjectively believe they deserve. California law strongly respects property owners’ autonomy to decide where their wealth ultimately goes.

To successfully challenge their parent’s trust, they must successfully demonstrate one or more of the following elements:

• Lack of Testamentary Capacity. The parent lacked the mental capacity to understand what they were doing when they signed and executed the trust.
• Undue Influence. A third party used illicit means (e.g., intense pressure, physical threat) to influence the vulnerable parent to execute a trust that deviated from the parent’s true intentions.
• Fraud. The parent was actively lied to about what the legal document was or what it accomplished.
• Forgery. The physical signature on the trust document was faked, or the pages were illicitly altered after signing.
• Mistake. An attorney drafted the final document incorrectly and it severely deviates from what the parent actually instructed the lawyer to write.

What Is Undue Influence in California Estate Planning?

Undue influence occurs when a bad actor completely overcomes your parent’s free will, coercing them into executing a trust that primarily benefits the manipulator. This scenario is incredibly common when an elderly parent becomes completely physically dependent on a hired caregiver, a much younger new spouse, or one specific controlling child.

California courts take allegations of undue influence very seriously. Manipulators often follow a highly predictable pattern of abusive behavior. They usually isolate the vulnerable parent from the rest of the biological family, intercept incoming phone calls, and aggressively control the flow of all outside information. The manipulator might even fire the parent’s long-standing estate-planning attorney and hire a new lawyer to draft an amendment that drastically alters how the family’s assets are distributed.

If an unrelated caregiver suddenly receives a multimillion-dollar Los Angeles property while the biological children receive nothing, the court may actually presume that undue influence occurred. Under certain California statutes, in these suspicious cases, the legal burden of proof actually shifts to the caregiver to prove they did not manipulate the elderly parent.

Frequently Asked Questions (FAQs) for Challenging a Parent’s Trust 

Can a disinherited child see a copy of the trust?

Yes. When a trust becomes irrevocable, the California Probate Code states that all legal heirs and named beneficiaries are entitled to receive a complete copy of the trust document. This right applies even if they were explicitly disinherited.

This is a powerful legal right because it lets disinherited children review the trust’s beneficiaries and see exactly who gets what. For example, if the trust awards a significant portion of assets to someone with a history of abusing the parent, that is a strong sign of undue influence.

Does challenging a trust mean going to trial?

In most cases, trust contests are resolved through formal mediation or a private settlement. Settling out of court saves money and is much faster than a trial, which can take years to resolve.

Can I challenge an amendment instead of the whole trust?

Yes, you can challenge amendments without challenging the entire trust. For example, if a parent created a valid trust in 2010 but a 2024 amendment mysteriously appears and the signatures don’t match, you have a strong case that the 2024 amendment was forged. If you successfully prove your case, then the court will strike the 2024 amendment and enforce the terms as they were written in 2010.

Can a stepparent stop me from challenging my biological parent’s trust?

No. In general, no one can stop you from filing a lawsuit or challenging a trust when you believe illicit or illegal activity has deprived you of property or assets you are legally entitled to. It does not matter if that person is a stepparent and/or a trustee.  

They may try to intimidate you, withhold funds that rightfully belong to you, mislead you about your legal rights, stonewall your access to the trust document, etc., but they lack the legal authority to prevent you from filing a legitimate lawsuit in California.

How Kushner Legal Can Help with California Trust Contests

Contesting a trust through mediation or litigation is incredibly complex. The person contesting is often at a disadvantage at first because they cannot use trust resources to fund their efforts. Meanwhile, trustees are often either large financial or legal institutions with extensive experience defending trust contests, or individuals who can use the trust’s assets to defend their position.

At Kushner Legal, our team can help you understand the best way to contest a trust that unfairly disinherits you or withholds assets. If you are using a trust to distribute assets to beneficiaries, we can help you avoid common issues that often give rise to trust litigation. Contact us today so a West Hollywood trust lawyer can help.