What Makes a Will Legally Valid in California?
A will is one of the most common estate planning documents, but not every document labeled a will is legally effective. California law sets specific requirements for how a will must be created, signed, and witnessed. When those requirements are not met, the document may be challenged, and the deceased person’s property could pass in a way they never intended. For families in San Bernardino, questions about validity often come up after a loved one’s death, when a will is discovered, and relatives disagree about whether it should be honored. These questions sit at the center of many will contests in San Bernardino. This article walks through the basic legal requirements, the role of mental capacity, and common issues that can call a will’s validity into question.
The Basic Formal Requirements
California Probate Code section 6110 sets out the core formalities for a standard witnessed will. The full statute is available through California Legislative Information. The table below summarizes the main elements.
| Requirement | What It Generally Means |
|---|---|
| In writing | The will must be a written document, whether typed or printed. |
| Signed | The person making the will, called the testator, must sign it, or another person may sign in the testator’s name at their direction and in their presence. |
| Two witnesses | Two people must be present at the same time to witness the signing or the testator’s acknowledgment of the signature or the will. |
| Witness understanding | The witnesses must understand that the document they sign is the testator’s will. |
Witnessing the Will
Witnesses play an important role because they can later confirm that the will was properly signed. Each of the two witnesses must also sign the will itself. California does not require a will to be notarized to be valid, although many wills include a declaration signed by the witnesses under penalty of perjury, which may simplify the probate process later.
When Formalities Are Not Perfectly Followed
California law provides some flexibility. If a will was not properly witnessed, it may still be treated as validly executed if the person offering it proves by clear and convincing evidence that the testator intended the document to be their will at the time they signed it. This is a demanding standard, and outcomes depend heavily on the available evidence. California also recognizes handwritten wills and a fill-in-the-blank statutory will form, each with its own rules.
Keeping the Original Signed Document
The original signed will is usually the document that matters in probate, so where it is stored can affect how smoothly the process goes. A copy may not be accepted as easily, and a missing original can raise questions about whether the will was revoked. Under California law, a person who has custody of a will must generally deliver the original to the superior court clerk within 30 days after learning of the testator’s death.
Age and Mental Capacity
Beyond formalities, the person making the will must have the legal ability to do so. California law addresses this through age and capacity requirements.
The Age Requirement
A person must generally be at least 18 years old to make a will in California. The individual must also be of sound mind at the time the will is signed. Capacity is measured at the moment of signing, so a person who later develops dementia may still have made a valid will if they had capacity when it was executed.
What Sound Mind Means Under California Law
Under Probate Code section 6100.5, a person may lack testamentary capacity if they cannot understand the nature of making a will, cannot understand and recollect the nature and situation of their property, or cannot remember and understand their relationships with close family members and others whose interests are affected. A person may also lack capacity if a mental health disorder causes delusions or hallucinations that result in a will they would not otherwise have made.
How Capacity Is Evaluated
Capacity questions are usually decided by looking at evidence from around the time the will was signed. Medical records, testimony from the witnesses, observations from friends and caregivers, and the circumstances of the signing may all be considered. California generally presumes that a person had capacity, so the person challenging the will typically carries the burden of showing otherwise.
Other Factors That Can Affect Validity
Even a properly signed will made by a person with capacity can be challenged on other grounds. These issues often arise when the circumstances surrounding the will seem unusual.
Undue Influence, Fraud, and Duress
A will may be invalidated if it was the product of undue influence, fraud, or duress. Undue influence generally involves someone using pressure or a position of trust to override the testator’s free will. California law also creates a presumption of undue influence for certain gifts, such as gifts to the person who drafted the will or, in some circumstances, to a care custodian of a dependent adult.
Interested Witnesses
A witness who also receives a gift under the will is known as an interested witness. California does not automatically invalidate the will in this situation. However, unless the will was also signed by at least two other witnesses who receive nothing under it, the gift to that witness is presumed to have been obtained through duress, menace, fraud, or undue influence. That presumption can be rebutted with evidence.
Revocation and Later Wills
A valid will can be revoked by a later will or by being intentionally burned, torn, canceled, or destroyed by the testator or by someone acting at their direction and in their presence. When multiple documents exist, the court may need to determine which one reflects the testator’s final wishes.
Protecting the Validity of a Will
A will is only effective if it meets California’s legal requirements and reflects the true wishes of a person with capacity. When those elements are uncertain, families may face delays, disputes, and difficult decisions about whether to accept or challenge the document. At Alden Probate, our team helps people review wills, understand the circumstances surrounding their creation, and evaluate whether concerns about validity may be worth pursuing. We also work with individuals who want to create a will carefully so that questions are less likely to arise later. If you have questions about a will, our San Bernardino will contest attorneys are available to review the details with you and discuss what options may be available.
