Grounds for Contesting a Will

Tim just received a copy of his mother’s will, and it’s… shocking. She completely cut him out, leaving everything to a new “friend” she met at her exercise class. He’s devastated, and understandably furious. He’s convinced his mother wasn’t in her right mind when she signed it, but he’s worried it’s too late to do anything. Unfortunately, these situations are common, and the cost of inaction can be substantial: losing your rightful inheritance. As an estate planning attorney and CPA with over 35 years of experience, I’ve seen countless families grapple with these difficult challenges in the Inland Empire. Let’s break down the legal grounds for contesting a will in California, and what Tim—and you—need to know.

What Does It Mean to Contest a Will?

Contesting a will isn’t simply saying you disagree with it. It’s a formal legal proceeding, a challenge to the will’s validity filed in probate court. The burden of proof is on the person contesting the will to demonstrate why it shouldn’t be enforced. It’s important to understand that successful contests are not guaranteed, and can be expensive, so a thorough assessment of your case is crucial. As a CPA as well as an attorney, I can quickly analyze the potential tax implications of a successful or unsuccessful contest, which is often overlooked but can be significant. A higher estate value means higher potential capital gains taxes, and understanding the step-up in basis is vital.

Can I Contest a Will Just Because I Think It’s Unfair?

No. California law requires more than just dissatisfaction. You must have “standing” to contest a will, meaning you are an ‘interested person’—meaning you would financially benefit if the current will is overturned (e.g., a child disinherited by a new will, or a beneficiary named in a previous version). Probate Code § 48 specifically outlines who qualifies as an interested person. Your sense of fairness doesn’t give you a legal right to challenge the document.

What Are Common Grounds for Contesting a Will?

Several factors can invalidate a will. Here are some of the most frequent:

• Testamentary Capacity: Was the testator (the person making the will) of “sound mind” when they signed it? This doesn’t mean perfect mental clarity, but they must have understood the nature of the act, their property, and their relationship to their family. Probate Code § 6100.5 uses a relatively low threshold, but significant dementia, delusions, or medication affecting cognition can be grounds for challenge.
• Undue Influence: Did someone pressure or coerce the testator into changing their will? This often involves a caregiver, friend, or family member benefiting from the new will. Probate Code § 21380 creates a presumption of undue influence if a gift is made to a caregiver, shifting the burden of proof to them to demonstrate they acted fairly.
• Fraud: Was the testator deceived into signing a will they wouldn’t have otherwise? This can take two forms: Execution Fraud (forging a signature) and Inducement Fraud (lying to the testator to change their estate plan).
• Improper Execution: California has very specific requirements for signing a will, including two witnesses. If these procedures weren’t followed precisely, the will may be invalid.

What If I Think the Will Was Forged?

Proving a signature is fake often requires a forensic handwriting expert. This can be costly, but essential. Similarly, proving fraud in the inducement requires evidence that the testator relied on a lie (e.g., “your son is stealing from you”) to change their estate plan.

The Ticking Clock: The Statute of Limitations

Don’t delay! Once the will is admitted to probate, interested parties have a strict 120-day window to file a petition to revoke probate. If you miss this deadline, the will is generally locked in stone, even if it was forged or signed under duress. Probate Code § 8270 is unforgiving on this point.

What About “No-Contest” Clauses?

Many wills include clauses stating that anyone who contests the will forfeits their inheritance. However, Probate Code § 21311 stipulates that a “No-Contest” clause is only enforceable against a beneficiary if they bring a contest without probable cause. If the beneficiary has a reasonable basis for the challenge (e.g., strong evidence of forgery), the court will not strip them of their inheritance for fighting back.

What determines whether a California probate estate closes smoothly or turns into litigation?

The path through California probate is rarely a straight line; it requires precise adherence to statutory deadlines, accurate asset characterization, and strict fiduciary compliance. Without a clear roadmap, what begins as a standard administrative proceeding can quickly dissolve into a costly battle over interpretation, valuation, and beneficiary rights.

A stable probate administration outcome usually follows from clarity, consistency, and readiness for court review, especially when multiple stakeholders and competing interpretations are involved. When documentation supports enforcement and timelines are respected, families are less likely to face preventable escalation.

Verified Authority on California Will Contests

• The 120-Day Statute of Limitations: California Probate Code § 8270
  Time is the enemy in a will contest. Under Section 8270, an interested person may petition the court to revoke the probate of a will, but this petition MUST be filed within 120 days after the will is admitted. Missing this deadline is usually fatal to the case.
• Mental Competency Standard: California Probate Code § 6100.5 (Unsound Mind)
  This statute defines exactly what “mental incompetency” means in probate. It is not just general forgetfulness; the contestant must prove the deceased did not understand the nature of the testamentary act, could not recollect their property, or was suffering from a specific hallucination or delusion that dictated the will’s terms.
• Presumption of Undue Influence (Caregivers): California Probate Code § 21380
  To protect vulnerable seniors, California law automatically presumes undue influence if a will leaves assets to a paid care custodian or the lawyer who drafted the instrument. This shifts the heavy burden of proof onto the accused to prove their innocence.
• No-Contest Clause Enforceability: California Probate Code § 21311
  Many wills contain threats to disinherit anyone who challenges them. This statute limits the power of those clauses. A beneficiary cannot be penalized for a contest if the court finds they had “probable cause” to file the lawsuit.
• Standing to Contest: California Probate Code § 48 (Interested Person)
  Not everyone can sue. To contest a will, you must qualify as an “interested person”—typically an heir who would inherit under intestate succession (if there were no will) or a beneficiary named in a prior valid will.
• Financial Elder Abuse Remedies: California Probate Code § 859 (Double Damages)
  Will contests often overlap with elder abuse claims. If the court finds that a person used undue influence, fraud, or bad faith to take assets (or change a will) to the detriment of the estate, they can be liable for twice the value of the property taken, plus attorney fees.