To be valid in California, a will must be in writing, signed by a mentally competent person who is at least 18, and signed by two witnesses who were together when the testator signed or acknowledged the document. Handwritten wills are also recognized without any witnesses if the signature and the key provisions are in the testator’s own handwriting. Those are the California will requirements at their core, and everything else, from community property limits to automatic revocation on divorce, sits on top of that foundation.
Who Can Make One
California allows anyone 18 or older to make a will. Emancipated minors can also do so.
Mental capacity is a separate hurdle with a specific legal test. Under Probate Code Section 6100.5, a person lacks capacity if, at the time of signing, they cannot understand the nature of writing a will, recall the general nature and extent of their property, or remember their relationship to the people who would normally inherit from them.1California Legislative Information. California Code Probate Code PROB 6100.5 A person also lacks capacity if delusions or hallucinations directly cause them to leave property in a way they otherwise would not have.
The bar is lower than most people assume. The testator does not need perfect memory or flawless judgment. They need a general understanding of what they own, who their close relatives are, and what signing the document does.
The Signing and Witness Rules
A formal will must be written. Typed, printed, or a mix of both is fine; oral wills are not recognized. The testator must sign it, and if they physically cannot, another person may sign in the testator’s name, but only while the testator is present and directing them to do so.2California Legislative Information. California Code PROB – Execution of Wills
Two witnesses must sign during the testator’s lifetime. Both witnesses have to be present at the same time. They must either watch the testator sign or hear the testator acknowledge the signature or the will itself. Each witness has to understand that the document is the testator’s will.2California Legislative Information. California Code PROB – Execution of Wills
A few practical points follow from those rules. The witnesses do not need to read the document, and they do not need to know what it gives away. They do need to know it is a will. And they need to be watching or hearing the same signing event, not signing at different times on different days.
When a Witness Is Also a Beneficiary
Using a witness who inherits under the will is legal but risky. If a subscribing witness stands to inherit and there are not at least two other disinterested witnesses, the law presumes the witness obtained the gift through duress, menace, fraud, or undue influence. The witness can fight that presumption, but the burden is on them. If they fail, they receive only up to what they would have gotten if the will did not exist at all.3California Legislative Information. California Code PROB 6112 – Execution of Wills
The safe practice is simple. Pick witnesses who receive nothing under the will.
Handwritten (Holographic) Wills
California recognizes holographic wills, which need no witnesses. The two requirements are that the signature and the material provisions must be in the testator’s own handwriting.4California Legislative Information. California Code PROB 6111 – Holographic Will Material provisions means the parts that name beneficiaries, describe gifts, and identify the executor.
Holographic wills are useful when someone cannot readily get to a lawyer or gather witnesses. The tradeoff is real. Their informal nature invites ambiguity, and with no witnesses, courts rely on handwriting analysis and other evidence to confirm the document is genuine and was meant as a final will rather than a rough draft or notes.
Two decisions show how courts approach the edges. In Estate of Black (1982), the testatrix wrote her will on a preprinted stationer’s form, filling in handwritten provisions around the printed boilerplate. The California Supreme Court held that the preprinted portions were not material to the substance of the will and did not invalidate the handwritten provisions.5California Supreme Court Resources. Estate of Black, 30 Cal.3d 880 In Estate of Williams (2007), the appellate court upheld a document written entirely in block capital letters on a notepad, rejecting challenges to both the signature and the writer’s testamentary intent.6vLex. In re Estate of Williams, 66 Cal.Rptr.3d 34, 155 Cal.App.4th 197 Courts look at substance over form. But clarity in a holographic will dramatically reduces the chance of a fight over what the writer meant.
When a Will Isn’t Executed Perfectly
A technical mistake with witnesses does not automatically kill a will. Section 6110(c)(2) provides a safety net. If the person offering the will can show by clear and convincing evidence that the testator intended the document to be their will at the time they signed it, the court can treat it as validly executed despite the defect.2California Legislative Information. California Code PROB – Execution of Wills
This is the provision that saves close-but-not-perfect wills, most often ones where the witness rules were not fully followed. Clear and convincing is a high standard, though. Relying on it is a last resort, not a substitute for signing the document properly the first time.
What a Valid Will Cannot Do
Even a perfectly executed California will has limits, and two of them catch people off guard.
The first is community property. California is a community property state, and when one spouse dies, only the decedent’s half of the community property belongs to the estate. The surviving spouse already owns the other half outright, and no will can override that ownership.7California Legislative Information. California Code PROB 6401 – Intestate Share of Surviving Spouse A will that purports to give away an entire house that is community property only actually controls half of it. Separate property, meaning assets owned before marriage or received during marriage as a gift or inheritance, can be left to anyone the testator chooses.
The second is beneficiary designations. Retirement accounts, life insurance, and similar assets pass to whoever is named on the account, regardless of what the will says. A will that leaves “everything to my sister” does not override a 401(k) beneficiary designation that still names an ex-spouse. Joint tenancy property likewise transfers automatically to the surviving owner outside the will. Reviewing beneficiary designations alongside the will is one of the simplest ways to prevent unintended results.
Revoking or Updating a Valid Will
A will stays valid until it is revoked or replaced, and California recognizes two methods. The first is executing a new will that expressly or implicitly revokes the old one. The second is physically destroying the document with the intent to revoke it. Destruction means burning, tearing, canceling, or obliterating. Someone else can do it on the testator’s behalf, but only while the testator is present and directing them.8California Legislative Information. California Code Probate Code 6120 – Revocation and Revival Courts look for clear evidence that the destruction was intentional.
For smaller changes, a codicil amends specific provisions without rewriting the whole will. A codicil must meet the same execution requirements as a will: written, signed, and witnessed, or handwritten and signed if holographic. When changes are extensive, a completely new will with an express revocation clause is usually the cleaner option. Stacking codicils onto an old will creates room for confusion.
Some life events trigger changes automatically. When a marriage ends in divorce or annulment, California automatically revokes any gift to the former spouse, any power of appointment granted to them, and any nomination of the former spouse as executor, trustee, or guardian.9California Legislative Information. California Code Probate Code 6122 – Revocation and Revival Marriage on its own does not revoke an existing will, but a new spouse who is left out may have a claim to an intestate share of the estate. Any major life change, whether marriage, divorce, birth, or death, is a reason to pull the will out and read it again.
What Happens Without a Valid Will
If a California resident dies without a will, or with one that fails these requirements and cannot be saved under Section 6110(c)(2), state intestacy rules take over. The surviving spouse receives all of the decedent’s share of community property.7California Legislative Information. California Code PROB 6401 – Intestate Share of Surviving Spouse Separate property is divided between the spouse and other close relatives depending on who survives: the spouse takes all of it if there are no children, parents, or siblings; one-half if there is one child or a parent or siblings; and one-third if there are multiple children.
Anything not passing to the surviving spouse goes to the decedent’s children in equal shares. If there are no children, the property moves up to the decedent’s parents, then to siblings, then to more distant relatives in a fixed statutory order.10California Legislative Information. California Code Probate Code PROB 6402 Unmarried partners, stepchildren, and close friends inherit nothing, no matter how important the relationship was in life. A valid will is the only way to direct assets to people outside the statutory line.
That is why the mechanics matter. A will that meets the writing, signature, and witness rules, made by someone who was 18 and mentally competent, does what a California will is supposed to do: it puts the testator in charge of who inherits, instead of the statute.