A codicil to a will in California is a short legal document that amends part of an existing will without replacing it, and under the Probate Code it has to be signed and witnessed the same way a will is. People use codicils to change an executor, adjust a beneficiary’s share, add a specific gift, or fix a mistake. For one or two clean changes a codicil works. For anything broader, a new will is usually the smarter document.
Two Ways to Make a Valid Codicil
California recognizes two paths. The first is a formal witnessed codicil under Probate Code Section 6110. It must be in writing, signed by you (or by someone else in your presence and at your direction if you cannot sign yourself), and signed by two witnesses who are both present at the same time. Each witness has to either watch you sign or hear you acknowledge your signature, and each must understand that the document is your will or codicil.1California Legislative Information. California Code Probate Code 6110 – Execution of Wills
The second path is a holographic codicil under Section 6111. No witnesses are needed, but your signature and all material provisions must be in your own handwriting. A date is not technically required, but leaving one off is risky. If an undated holographic codicil conflicts with another document, a court treats it as invalid on the conflicting points unless your estate can prove it was written later. And if there was any period during which you lacked testamentary capacity, an undated codicil can be thrown out entirely unless your estate proves you signed it while competent.2California Legislative Information. California Code Probate Code 6111 – Holographic Will Always write the date.
Either way, you need testamentary capacity at the moment of signing. Probate Code Section 6100.5 says you lack capacity if you cannot understand what you’re doing with your estate, cannot recall the nature of your property, or cannot remember your relationships with the people affected by the document. Delusions or hallucinations that directly shape how you distribute property are a separate ground for incapacity.3California Legislative Information. California Code Probate Code 6100.5 – Mentally Incompetent to Make a Will
Courts also look closely at holographic documents to decide whether they reflect a final decision or a draft. A letter musing about who should get the house is not the same as a deliberate amendment. Without the formality of a signing ceremony, clarity of intent has to do the work.
Who Should Sign as Your Witnesses
A widely believed rule says a beneficiary cannot witness your codicil. California law does not go that far. Under Probate Code Section 6112, the codicil is not automatically invalid just because a beneficiary signed it.4California Legislative Information. California Code Probate Code 6112 – Interested Witnesses
What actually happens is worse in some ways. If there are not at least two other disinterested witnesses, the law presumes the interested witness obtained the gift through fraud, duress, or undue influence. That presumption puts the burden on the beneficiary-witness to prove the gift was legitimate. If they fail, they still receive whatever they would have received under intestacy, but they lose anything above that amount.4California Legislative Information. California Code Probate Code 6112 – Interested Witnesses
Pick two witnesses who receive nothing under the will or the codicil. That single choice eliminates the presumption and closes off one of the easiest ways to attack the document later.
Drafting Language That Holds Up
Pull out your current will and any prior codicils before you start. You need the exact execution date of the original will so the codicil references the right document. If you’ve already signed earlier codicils, note their dates too, and number the new one in sequence, such as “First Codicil” or “Second Codicil,” so probate can follow the chain.
Identify precisely what is changing. Vague language like “I want to change what my daughter receives” invites litigation. Point to the specific article or paragraph in the will, state that you are revoking that provision, and spell out the replacement. If you’re naming a new executor, reference the clause where the original executor was named and give the replacement’s full legal name and relationship to you. Describe any specific asset in enough detail to distinguish it from other estate property.
Every codicil should include a sentence confirming that all provisions of the original will not specifically changed by the codicil remain in full force. Without that, someone can argue you meant the codicil to revoke the whole will.
Signing, Notarizing, and Storing the Document
For a formal codicil, the signing ceremony mirrors what you’d do for a will. You sign in front of two witnesses who are in the room at the same time, and each witness then signs the codicil, acknowledging they saw you sign or heard you confirm your signature and that they understand what the document is.1California Legislative Information. California Code Probate Code 6110 – Execution of Wills A holographic codicil just needs your handwritten signature, but the material provisions must still be entirely in your handwriting.2California Legislative Information. California Code Probate Code 6111 – Holographic Will
Section 6110 does not require witnesses to list their addresses, though many attorneys add address lines so the witnesses can be found later. Notarization is not required either. But having your witnesses sign a sworn affidavit in front of a notary can save time in probate, because the affidavit substitutes for live witness testimony if a witness has moved or died. California notaries can charge up to $15 per signature for an acknowledgment.5California Secretary of State. California Notary Public Handbook
Keep the codicil with the original will. Physically attaching them cuts the risk of the codicil getting separated and missed. If an attorney holds your original will, deliver the codicil to that office. Tell your executor where both documents are. A codicil nobody can find does nothing.
When a New Will Is the Better Choice
A codicil is a tool for narrow changes. Every additional codicil is another document a probate court has to read, interpret, and reconcile with everything else you’ve signed. When two codicils touch nearby provisions, even small inconsistencies can produce a fight over what you actually meant.
Consider writing an entirely new will when:
- Multiple provisions need updating. Changing beneficiaries, the executor, and how assets are divided all at once is cleaner in a single new document.
- You’ve already signed one or more codicils. Stacking amendments creates confusion; a fresh will consolidates everything.
- A major life event has occurred. Divorce, remarriage, the birth of a child, or a substantial change in assets usually affects enough of the will to justify a rewrite.
- The original will is old. Language and planning approaches change, and a decades-old will may miss updates a new one would capture.
When you sign a new will, include a clause that expressly revokes all prior wills and codicils. That eliminates any question about which document controls.
Revoking or Replacing a Codicil
California gives you two ways to revoke a codicil. You can sign a later will or codicil that expressly revokes it or contains inconsistent provisions. Or you can physically destroy the codicil by burning, tearing, canceling, or obliterating it, as long as you act with the intent to revoke. Someone else can destroy it for you, but only in your presence and at your direction.6California Legislative Information. California Code Probate Code 6120 – Revocation of Wills
One trap worth knowing: revoking a codicil does not automatically revive the original will provisions that the codicil had changed. Under Probate Code Section 6123, a revoked provision can be revived only if you intended that result when you revoked the later document. If you destroy a codicil that swapped your executor from Alice to Bob, a court will not necessarily default back to Alice unless your intent to restore her is clear. The safer path is to sign a new codicil or will that expressly reinstates what you want.
What Makes a Codicil Vulnerable to Challenge
Because a codicil has to meet the same standards as a will, it faces the same lines of attack: lack of testamentary capacity, undue influence by someone in a position of trust, improper execution under Sections 6110 or 6111, fraud, and ambiguity so severe the court cannot determine what you meant.3California Legislative Information. California Code Probate Code 6100.5 – Mentally Incompetent to Make a Will1California Legislative Information. California Code Probate Code 6110 – Execution of Wills
The person challenging the codicil carries the burden of proof, but that is cold comfort while your estate sits in litigation. If your original will contains a no-contest clause, it may also apply to challenges against your codicil, though California only enforces those clauses against direct contests brought without probable cause and against a narrow set of other filings the clause expressly covers.7California Legislative Information. California Code Probate Code 21311 – No Contest Clause Enforcement Clean drafting, disinterested witnesses, and a notarized witness affidavit all make a codicil harder to attack. If a change is likely to surprise or upset a beneficiary, working with an estate planning attorney to document your capacity and intent at the moment of signing can head off a challenge before it starts.