Yes, you can contest a will in California, but you need valid legal grounds and must file your challenge within strict deadlines. The most common reasons to contest are that the person was under undue influence, lacked mental capacity when they signed, the will wasn't properly executed, or it was the result of fraud. If you have standing and a legitimate claim, California courts will hear your case. I see families dealing with this situation more often than you'd think. Maybe you discovered your grandmother left everything to a caregiver she'd known for only two years, or your father's will suddenly "changed" right before he passed. These situations are emotionally brutal — and legally complex. Here's what you need to know.

Grounds for Contesting a Will in California

Not everyone who feels snubbed by a will can run to court. California law requires you have actual legal grounds — not just hurt feelings or a belief that someone deserved more.
What I See Constantly: "When clients come to me saying 'this doesn't seem fair,' I have to explain that unfair and unlawful are two different things. A will can leave everything to one child and nothing to another — that's legal. What California law cares about is whether the person who made the will was protected from coercion, understood what they were signing, and was of sound mind."
**Undue influence** is the most common grounds I see in California will contests. This happens when someone uses a position of power or trust to pressure an elderly or vulnerable person into changing their will. The caregiver who moved in six months ago, isolated mom from her family, and then appeared with a new will? That's undue influence. Testamentary capacity means the person signing the will understood what they were doing. They knew they were making a will, understood the nature and extent of their property, and recognized who would naturally inherit from them. Dementia, advanced illness, or heavy medication can all affect capacity — but having these conditions doesn't automatically mean someone lacked capacity. It's a fact-specific question. Improper execution happens when the will doesn't meet California's formal requirements. California requires two witnesses to sign the will, and their signatures need to be notarized if you use a self-proving affidavit. Some wills get thrown out simply because of missing or incorrect witness signatures. Fraud is rarer but happens. This is when the person signing the will was deceived about what they were actually signing — someone swapped pages, misrepresented a document, or made false claims about what would happen if they didn't sign.

"In all cases, the court shall consider the extent to which the decedent was subject to undue influence in determining the decedent's intent."

— Prob. Code § 86

Who Has Standing to Contest a Will in California?

Even if you have ironclad grounds, you can't contest a will unless you have legal "standing." This means you must be an interested party — someone who would actually benefit or lose from the will being upheld or thrown out. Generally, this includes:
  • Beneficiaries named in the will — but only if a later will replaced yours, or if you're contesting specific provisions
  • Heirs who would inherit under intestate succession — this is who would get the property if there were no will at all
  • Creditors of the estate — in limited circumstances
  • The surviving spouse or domestic partner — who may have rights under Family Code provisions
Example: "David came to me after his father died. Dad had cut David out of the will completely, leaving everything to his second wife. But David found out the second wife had convinced Dad to sign a new will just three weeks before his death, after Dad's dementia diagnosis. David had standing because as an omitted child, he'd inherit under intestate law if the will was invalidated."

The Timeline: You Must Act Quickly

Here's where people blow it. California's deadline for contesting a will is unforgiving.

Key Numbers:

  • 120 days — From the date the will was admitted to probate, you generally have 120 days to file a contest (Prob. Code § 8280)
  • 30 days — If you're served with notice of probate admission
  • 90 days — Some situations allow for late discovery extensions, but you need to show good cause
That 120-day window starts when the probate court formally admits the will. In practice, this means you need to act fast once probate opens. Waiting until you "feel ready" or trying to gather evidence slowly will destroy your case.
⚠️ Watch Out: Many people think they can "just ignore" a probate notice because they weren't close to the person. Wrong. If you're an heir, that notice isn't a courtesy — it's your legal window to challenge the will. I can't tell you how many times I've seen siblings lose their rights because they threw the notice in a drawer thinking it didn't apply to them.

How to Contest a Will in California

Contesting a will isn't a single form you fill out. It's a legal process with steps.
  1. File a Will Contest Petition

    2. You file Form DE-131 (Petition for Probate) or a specific contest petition in the probate court where the estate is being administered. You must state your grounds clearly — undue influence, lack of capacity, improper execution, or fraud. "I don't like it" isn't a ground.

  2. Serve All Interested Parties

    3. Everyone who has an interest in the estate must be formally served with your contest. This includes other beneficiaries, heirs, and the executor. Proof of service gets filed with the court.

  3. Gather Your Evidence

    4. This is where cases are won or lost. Medical records showing cognitive decline. Phone records showing isolation from family. Witness statements about behavior changes. Financial records showing unusual activity. Your attorney will help you subpoena records and prepare declarations.

  4. Attend the Hearing

    5. California probate courts hold hearings on will contests. You'll present your evidence, the other side responds, and a judge decides. Some cases settle — a caregiver agrees to give up some inheritance, for example — before reaching a final ruling.

What Happens If You Win?

If the court finds in your favor, the will or specific provisions get thrown out. Then what? The answer depends on whether there's an earlier valid will. If Grandma's 2015 will exists and it was properly executed, the court may admit that one instead. If no valid will exists, the estate gets distributed according to California's intestate succession laws — which means the person would inherit based on their blood relationship, not their relationship with the caregiver.

What Nobody Tells You:

Winning a will contest doesn't automatically mean you get what you think you're owed. Courts can only work with what exists. If the estate has already been spent, or if assets passed outside probate through joint tenancy or beneficiary designations, you may have limited recovery options. This is why early action matters — you want to freeze assets before they're gone.

Should You Contest? Questions to Ask Yourself

Before you start this process, be honest with yourself:
  • Do I actually have legal grounds? Suspicion isn't enough. You need evidence that meets California's legal standards.
  • What's the estate worth? Contesting a will costs money — attorney fees, court costs, expert witnesses. If the estate is small, it may not be worth the fight.
  • How strong is my case? Undue influence cases often come down to circumstantial evidence. Do you have witnesses, records, documentation?
  • Am I prepared for family fallout? Will contests rip families apart. Siblings stop speaking. Estates get drained by litigation. Are you ready for that?

What to Do Next

If you think you have grounds to contest a will in California, act now. Don't wait. Don't assume someone else will handle it. Don't think you'll "figure it out later."
  1. Gather documents — Get copies of the will, the death certificate, and any prior versions of wills you know existed
  2. Note the probate timeline — Find out when the will was admitted and when the 120-day clock started
  3. Consult a probate attorney — You don't have to do this alone, and honestly, most people shouldn't. Probate court has its own rules, its own forms, and its own culture. An attorney who practices in your specific courthouse can be worth their weight in gold.
  4. Preserve evidence — Don't delete texts, don't throw away letters, don't let anyone "clean out" the house before you've documented everything
This isn't legal advice — every situation is different, and California probate law has nuances that depend entirely on your facts. But if you're reading this wondering whether you have a case, the answer is: maybe. And "maybe" is worth a conversation with a qualified attorney. Don't sit on your rights.

Frequently Asked Questions

**So how long do I actually have to contest a will in California?** You generally have 120 days from when the probate court admits the will to probate. But here's the catch — if you're named as an interested party and were properly served with notice, you might only have 30 days. Don't assume you have more time than you do. Talk to an attorney immediately. **How much does it cost to contest a will in California?** It varies widely. A straightforward contest with a clear undue influence case might settle for attorney fees in the $10,000-$30,000 range. Complex cases involving medical experts, financial forensic analysis, and multi-week trials can run $100,000 or more. Some attorneys take probate cases on contingency, meaning they take a percentage of what you recover. Others bill hourly. Get fee agreements in writing before you sign anything. **Can I contest a will without hiring a lawyer?** You can represent yourself in probate court — California's courts are technically open to self-represented litigants. But here's what I see: people who try to handle will contests on their own almost always make procedural mistakes that cost them their cases. Filing the wrong form, missing a deadline, failing to properly serve parties — these aren't minor issues. They can kill your case entirely. If the estate is significant enough to be worth contesting, it's significant enough to hire help. **What if the will has a no-contest clause?** Many California wills include "in terrorem" clauses that say if you challenge the will and lose, you get nothing. Under California Prob. Code § 21300, these clauses are generally enforceable. But there are exceptions — if your contest is based on fraud or if you have probable cause, the clause might not apply. This is another reason to talk to an attorney before filing anything. **What assets can I actually recover if I win?** It depends on how the estate was structured. Assets held in joint tenancy, life insurance with named beneficiaries, and retirement accounts often pass outside the will entirely. If those assets were improperly changed near the end of someone's life, you might have separate claims against those vehicles. The will contest only covers what's actually in the probate estate.