Reading a loved one’s will can raise difficult questions. Sometimes, the terms do not match what you expected or what you believe they truly wanted. When something feels off, it is natural to wonder if the document is valid.
In California, you can challenge a will, but only under specific legal grounds. Courts do not set aside a will simply because someone is unhappy with the outcome. There must be a recognized legal reason supported by evidence.
Who Has the Right to Challenge a Will in California?
Not everyone can contest a will. California law limits this right to “interested persons.” This generally includes heirs, beneficiaries, or others who would be affected by the outcome.
If you do not fall into one of these categories, the court will likely dismiss the case early. Before moving forward, it is important to confirm that you have standing to file a contest.
The 6 Legal Grounds for Contesting a Will in California
Reading a will can raise difficult questions, especially when the terms do not reflect what you believe your loved one truly intended. California law allows you to challenge a will, but only for specific and legally recognized reasons. Understanding these grounds is the first step in determining whether a contest is appropriate and what evidence may be needed to move forward.
1. Lack of Testamentary Capacity
This is one of the most common grounds raised in California will contests. For a will to be valid, the person signing it must have had “testamentary capacity” at the moment of execution. That means they must have understood the nature of what they were doing, known the general nature and extent of their property, recognized the people who would naturally receive their estate, and been able to form an orderly plan for distributing it.
Probate Code Section 6100.5 defines when a person lacks this capacity. A diagnosis of Alzheimer’s disease, advanced dementia, or a severe psychiatric disorder does not automatically void a will, because capacity is measured at the specific time the document was signed. However, if medical records, caregiver notes, or witness testimony show that the testator was experiencing significant cognitive impairment at the time of execution, that evidence can be powerful. Courts have held that the legal standard for testamentary capacity is intentionally low, so proving its absence requires demonstrating that the person genuinely could not grasp the four essential elements listed above at that moment.
2. Undue Influence
Undue influence occurs when someone substitutes their wishes for those of the person making the will, essentially hijacking the testamentary process. It is not the same as simply persuading a relative to leave you more. The influence has to be so overpowering that it eliminates the testator’s free will entirely.
California courts look at several factors to identify undue influence, including whether the alleged influencer had a confidential or dependent relationship with the testator, whether they actively participated in preparing or executing the will, whether they isolated the testator from family and friends, and whether the resulting will is dramatically different from prior versions or from what the testator had told others they intended to do. When a caregiver, a new romantic partner, or a financially interested family member is the one who arranged for the attorney, drove the testator to the signing, and stands to receive the bulk of the estate, courts take notice.
There is also a statutory presumption of undue influence under Probate Code Section 21380 for certain donative transfers to caregivers, care custodians, and other statutorily defined disqualified persons. If that presumption is triggered, the burden shifts to the person defending the will to prove it was not the product of undue influence.
3. Fraud
Fraud in the context of a will contest takes two forms. The first is fraud in the inducement, where someone lies to the testator about material facts to manipulate them into signing a particular will. For example, if a sibling falsely told your parent that the other children had already stolen from the estate and were planning to contest any prior will, and that lie drove your parent to cut those children out, that could constitute fraud.
The second form is fraud in the execution, which happens when someone deceives the testator about what document they are actually signing. A testator who believed they were signing a power of attorney but was actually signing a will has not exercised any genuine testamentary intent at all. In both scenarios, the will is not a true expression of the person’s wishes and can be challenged on that basis.
4. Duress or Menace
Duress and menace are sometimes grouped together with undue influence, but they are technically distinct. Duress involves coercing someone into signing a will through threats or force. Menace involves creating a reasonable apprehension of harm. Picture an elderly person being told by a relative that they will be placed in a facility, cut off from family visits, or worse if they do not sign a will that favors that relative. That kind of coercive pressure goes beyond persuasion and into territory that California law treats as grounds to void the resulting document.
These cases can be harder to prove than undue influence because the testator is no longer alive to describe what happened. Witness testimony from people who observed the relationship, text messages, emails, or documented behavioral changes around the time of the signing can all help establish that the will was signed under compulsion rather than choice.
5. Mistake
Mistake as a will contest ground covers situations where the testator signed the wrong document, included provisions based on a material misunderstanding, or was misinformed about a key fact that drove their decision-making. It can also come up when a will fails to reflect what the testator actually said they wanted because of an error by the drafting attorney.
Mistake is one of the more technically challenging grounds to pursue because courts are generally reluctant to substitute their judgment for the testator’s written instructions. California courts will, however, consider extrinsic evidence to determine whether the document as written reflects the testator’s true intent. After the California Supreme Court’s decision in Estate of Duke, courts may reform a will if clear and convincing evidence shows that it does not accurately capture what the testator intended. When the gap between what someone said they wanted and what ended up in the will is significant and well-documented, mistake can be a viable ground.
6. Revocation
A will can be revoked in California in several ways. The testator can physically destroy it, cross out its provisions, or execute a new will that supersedes the old one. Under Probate Code Section 6120, a will is revoked by a subsequent will that expressly revokes it, or by a writing or physical act performed with the intent to revoke.
Revocation grounds come up most often when someone submits an older will to probate when a newer one exists, or when the testator clearly intended to destroy or replace a will but there is a dispute about whether the steps taken were legally sufficient. If you know your family member signed a newer will that was never located, or if you have evidence that they verbally expressed an intent to revoke the document that ended up in probate, this may be a ground worth pursuing.
What About Improper Execution? Is That a Separate Ground?
You may have noticed that “improper execution” does not appear in the list of six grounds in the Probate Code. That is because improper execution is actually addressed separately, at the level of basic validity. Under Probate Code Section 6110, a will must be in writing, signed by the testator (or by someone at the testator’s direction and in their presence), and witnessed by at least two people who were both present at the time of signing and who understood that the document was the testator’s will.
If those requirements are not met, the will is not valid in the first place, so a contest on this basis is really an argument that no valid will exists at all rather than a challenge to an otherwise valid one. Courts do have limited discretion under Section 6110(c)(2) to admit a defectively executed will if clear and convincing evidence shows the testator intended it to be their will, but that is a high bar to clear.
How Long Do You Have to Contest a Will in California?
Timing is important. You can object before the will is admitted to probate. After that, you generally have 120 days to file a contest once the court admits the will.
Missing the deadline can prevent you from bringing a claim, even if you have strong evidence.
What If the Will Has a No-Contest Clause?
Some wills include a clause that discourages challenges by threatening to reduce or remove an inheritance. These clauses can be enforced in certain situations.
However, California law provides protection if the contest is filed with probable cause. This means there must be a reasonable basis supported by facts before filing, and a no-contest clause cannot be enforced against a direct contest that is brought with probable cause.
Key Takeaways
- California recognizes six legal grounds to contest a will: capacity, undue influence, fraud, duress, mistake, and revocation.
- Only interested persons have the right to file a will contest.
- Deadlines are strict, generally requiring a contest to be filed before probate or within 120 days after the will is admitted.
- No-contest clauses may apply, but they cannot be enforced against a direct contest brought with probable cause.
- Strong documentation and testimony are often needed to support a claim.
Frequently Asked Questions
Can I contest a will just because I was left out?
No. Being excluded is not enough on its own. You must show a valid legal ground and have standing as an interested person under California law.
How is undue influence proven?
It is typically shown through witness testimony, medical records, financial evidence, and signs that someone exercised excessive control or pressure over the person who signed the will.
What does testamentary capacity mean?
It means the person understood what they were signing, the property they owned, the people who would naturally inherit from them, and the general plan for how the will would distribute their estate.
Can only part of a will be invalid?
Yes. A court can strike specific provisions that are invalid while keeping the remainder of the will in place if the rest of the document still reflects the testator’s intent.
What is the deadline to contest a will?
In most cases, you must object before the will is admitted to probate or file a contest within 120 days after the court admits it.
Is Something Wrong With a Loved One’s Will?
When a will does not reflect what you believe your loved one intended, it can raise serious concerns. Questions about fairness, influence, or validity should not be ignored. Taking action early can make a meaningful difference in what options remain available.
Casiano Law Firm handles will and trust contests across San Diego County, Orange County, Los Angeles County, Riverside County, and San Bernardino County. Each situation can be carefully reviewed to determine if there is a valid legal basis to proceed. Addressing the issue sooner helps protect your rights and preserves the ability to take the next step.
