How to Contest a Will in California: A Step-by-Step Guide

Losing a parent or loved one is hard enough without discovering that their final wishes may not have been honored. If you believe a will was signed under pressure, or that it wasn't handled the way the law requires, you may have grounds to take action. How to contest a will in California is a question we hear often from families who suspect something isn't right, whether that's a sudden late-in-life change to a longtime estate plan or a signature that doesn't look quite right.

Challenging a will in California is not as simple as telling a judge you disagree with how an estate was divided. California law sets out specific grounds and strict deadlines that a will contest in California must follow, and missing even one requirement can end your case before it starts. According to California Probate Code § 8270, any interested person, other than a party to a will contest, generally has 120 days after a will is admitted to probate to petition the court to revoke that probate.

In this guide, we'll walk through the most common grounds for a contest, like mental capacity questions and improper execution, who qualifies as one of the interested parties with legal standing to file, and the steps involved in bringing a claim before California's probate courts.

What Does It Mean to Contest a Will in California?

A will contest is a formal legal challenge asking the probate court to set aside all or part of a will, not just a family disagreement about who got what. Many people ask, “How do I contest a will after noticing something felt off,” maybe an executor who won't answer questions, or an estate plan that changed dramatically near the end of a loved one's life.

The probate court exists to oversee the administration of a deceased person's estate: confirming the will is valid, appointing the executor, and making sure beneficiaries receive what they're entitled to under the document, or under intestacy law if there's no valid will. This oversight happens as part of the probate process, and it's the venue where any contest gets filed and heard.

It's worth being upfront that disagreeing with a will isn't the same as having legal grounds to challenge it. California will contest law only recognizes specific grounds, like lack of capacity, undue influence, fraud, or improper execution. Simply feeling an inheritance was unfair doesn't meet that bar.

This is also why California courts require evidence, not suspicion. Under the California Probate Code, the proponent of a will bears the burden of proving due execution, while the person contesting it bears the burden of proving grounds like lack of capacity, undue influence, fraud, duress, mistake, or revocation. According to Probate Code § 8252, courts weigh medical records and witness testimony, not a family's gut feeling about how things turned out. How to contest a will in California starts with evidence, not emotion.

Who Can Contest a Will in California?

How to contest a will in California starts with one threshold question: do you have legal standing? Courts define an "interested party" under Probate Code § 48 as someone with a real financial stake in the outcome, like an heir, beneficiary, creditor, or spouse.

So can you contest a will just because you disagree with it? Not unless you fall into one of these categories:

• Named beneficiaries: anyone named to inherit under the current will
• Family members who would inherit under California's intestacy laws if the will were thrown out
• Beneficiaries under a previous will: people who'd receive more under an earlier version
• Creditors: rare, but a creditor with a claim against the estate can qualify

Someone who wouldn't receive anything either way, whether the will stands or falls, generally cannot bring a contest, even if they feel strongly the outcome was unfair. A close friend or a distant relative left out of every version of the plan typically lacks standing.

Courts require this threshold before hearing a case because contesting a will in California is a serious legal proceeding, not a forum for airing grievances. Without standing, there's no case to hear. How can someone contest a will without it? They can't. Establishing standing early is often what separates successfully breaking a will from having a petition dismissed before it's ever considered on the merits, and that's the first step in how to contest a will and win.

Legal Grounds to Contest a Will in California

How to contest a will in California always starts with identifying grounds for contesting, since disagreement alone won't move a case through the legal process. Here's the process of contesting a will on each of six recognized grounds. 

Lack of Testamentary Capacity

Under Probate Code § 6100.5, a testator must understand they're making a will, know their property, and recognize close family relationships. Dementia or Alzheimer's doesn't automatically disqualify someone; capacity is judged at the time of signing. Medical records and testimony are key evidence.

Undue Influence

Undue influence means someone overpowered the testator's free will and substituted their own wishes. Warning signs include isolation from family and sudden changes benefiting a caregiver. California presumes undue influence when a caregiver or fiduciary who drafted the will also inherits under it, shifting the burden of proof to them.

Fraud

Fraud comes in two forms. Fraud in the execution tricks someone into signing a document they don't realize is a will. Fraud in the inducement happens when the testator signs based on a lie, like being falsely told a family member had died.

Forgery

Forgery involves a faked signature or a fabricated amendment the testator never signed. These cases often rely on handwriting experts comparing signatures against known samples, along with evidence about the testator's whereabouts when the document was supposedly executed.

Improper Execution

California requires a will to be signed by the testator and witnessed by two people present at the same time under Probate Code § 6110. Skipping these formalities can invalidate the entire will. Holographic wills are an exception; if the signature and key terms are in the testator's own handwriting, no witnesses are required.

Revocation

A will can be revoked by a later will, physical destruction like burning or tearing done with intent to revoke, or a written revocation. If a previous will is offered for probate after being properly revoked, that's valid grounds to challenge it.

Step-by-Step: How to Contest a Will in California

How to contest a will in California follows a fairly predictable path once you understand it. Here are the steps to contesting a will, from standing to a final ruling.

Step 1: Determine Whether You Have Standing

The first of these steps to contesting a will is confirming you have standing to contest it. You must be an heir, beneficiary, or someone who would inherit under an earlier valid will or under intestate succession if this one falls.

Step 2: Identify the Legal Grounds

Next, identify common grounds for your case, like lack of testamentary capacity, undue influence, fraud, or forgery. California courts require evidence of one of these recognized grounds, not just a sense the outcome was unfair; a testator's mental illness alone isn't automatically disqualifying unless it meets the legal standard.

Step 3: Gather Evidence

Gathering evidence early makes or breaks a case. That typically includes medical records, financial records, emails, text messages, prior estate planning documents, caregiver logs, and handwriting analysis if forgery is suspected.

Step 4: Consult a California Probate Attorney

Timing matters, so consult a probate attorney early for a case evaluation, evidence preservation, and to avoid missing deadlines. An attorney can also confirm whether you have probable cause and a valid reason to file before committing to litigation.

Step 5: File a Petition in Probate Court

Filing happens in the probate court for the county handling the estate. The petition is a formal objection stating your standing and grounds, and it must be filed within 120 days after the will is admitted to probate. Notice goes to all interested parties, and court rules set the initial hearing.

Step 6: Discovery

During the discovery process, both sides take depositions, consult medical experts, request documents, and interview witnesses. This is where the burden of proof really gets tested, since the contestant must show their grounds affected the entire document or a specific provision.

Step 7: Settlement or Trial

Many cases resolve through mediation or settlement negotiations before trial, since litigating over the estate's assets can be costly for everyone involved. If the case does go to trial, a judge weighs the evidence and rules on whether the will, or a previous valid will, should stand.

When Should You Contact a California Probate Litigation Attorney?

Not every family situation calls for a lawsuit, but certain red flags mean it's time to talk to an experienced probate litigation attorney sooner rather than later.

Reach out if you're seeing suspected undue influence, dementia or capacity concerns, missing assets, forgery, or outright fraud. Family disputes over an inheritance and complex estates with multiple properties or business interests also tend to need real legal guidance, not guesswork. And if a deadline is approaching, that urgency alone is a reason to call, since strict deadlines in probate cases don't bend for good intentions.

How to contest a will in California involves precise rules, and not just anyone can walk into California courts and expect a hearing. Estate litigation moves through court hearings, evidence, and ultimately a court's decision, so having the right team from the start matters for anyone who wants to successfully contest a will or trust.

If any of this sounds like your situation, don't wait until the window closes. The team at Berman & Riedel offers consultations to help you understand your options before statutory deadlines expire.

California Will Contest FAQs

How Long Do You Have to Contest a Will in California?

Under Probate Code § 8270, most challenges must be filed within 120 days after a will is admitted to probate. These strict time limits apply to most family members and other interested parties, and there's generally no extension for missing the window, so acting quickly protects your legal rights.

What Is California’s Undue Influence Standard?

Undue influence occurs when someone overpowers a testator's free will, replacing their true wishes with their own through manipulation, isolation, or pressure. California law creates a presumption of undue influence when a caregiver or fiduciary who drafted the will also benefits from it, shifting the burden to that person to prove the will reflects the testator's genuine intent.

What Is a No-Contest Clause?

A contest clause (also called a no-contest clause) is a provision that disinherits a beneficiary who challenges a will and loses. California limits how these clauses can be enforced: if you file with probable cause, meaning a reasonable, evidence-based belief in your claim, you're protected from disinheritance even if your contest attorney ultimately doesn't win.

What Does It Cost to Contest a Will in California?

Costs vary widely depending on complexity and how long the case runs. Attorney fees, court filing fees, and expert witness fees for handwriting or medical experts all add up, especially in cases that reach trial. Some attorneys offer contingency arrangements, so it's worth discussing payment structure during your initial consultation.

How Long Does a Will Contest Take?

Timelines depend heavily on how contested the case is and whether it settles. Straightforward cases may resolve in several months, while contested matters that go through discovery and reach trial often take one to three years. Mediation frequently shortens that timeline, since many disputes over an estate's assets settle before a court determines the outcome at trial.

What Happens if the Will Contest Succeeds?

If a court finds the current will invalid, the estate typically passes under an earlier valid will if one exists, or under California's intestacy laws if it doesn't. This can significantly change who inherits, so success in these cases directly affects the heirs at law entitled to a share of the estate.

Can You Contest a Will Before Probate?

Yes. Before a will is admitted to probate, an interested person can file a formal petition objecting to it, rather than waiting for the standard post-probate window. This route lets the court examine the will's validity, including financial statements and other records, before distribution begins, making it often the fastest path in how to contest a will in California.

Give Our Team a Call Today

If you believe a loved one's will doesn't reflect their true wishes, don't wait for statutory deadlines to close your options. How to contest a will in California starts with a conversation, and Berman & Riedel is ready to help you understand where you stand.

Our team has the probate litigation experience to evaluate your case, from suspected undue influence to forgery and missing assets. You can see our track record on our verdicts and settlements page, and if your situation also involves an injury or elder abuse claim, our personal injury attorney team can help there too.

Call us today at (858) 350-8855 or reach out through our online form to schedule your consultation. The sooner you call, the more options you'll have.