In most states, a codicil to a will does not need to be notarized to be legally valid. Validity comes from signing the document and having it witnessed, not from a notary’s seal. Notarization still matters in practice, though, because a notarized “self-proving affidavit” attached to the codicil can save your family real time and money in probate. And a handful of states now let notarization substitute for witnesses entirely, so the rule is not the same everywhere.
What Actually Makes a Codicil Valid
A codicil has to meet the same execution requirements as the will it changes. In most states that means three things. The codicil must be in writing. You must sign it, or direct someone else to sign it in your presence. And at least two witnesses, neither of whom is a beneficiary under the will or the codicil, must sign as well.
The witnesses either watch you sign or hear you confirm that the signature on the document is yours. They then sign themselves, typically while you are still there. Once those steps are done, the codicil is effective. A notary is not part of this core process.
The codicil should also identify which will it is amending. Courts have rejected codicils that did not contain enough information to tie them to a specific prior will. Naming yourself as the testator and citing the date of the original will is usually enough to close that gap.
Why People Notarize Anyway: The Self-Proving Affidavit
Notarization becomes useful when you want to make the codicil “self-proving.” A self-proving affidavit is a separate sworn statement, signed by you and your witnesses in front of a notary, confirming that everyone followed the proper signing procedure.
Without one, the probate court may need your witnesses to appear in person or submit sworn testimony to confirm they saw you sign. If a witness has moved, become incapacitated, or died, replacing that testimony creates delays and legal fees that far exceed the small cost of notarization up front.
Inside the affidavit, you declare that the codicil reflects your wishes and that you signed voluntarily. Your witnesses confirm they saw the signing and believed you were of sound mind and not under pressure. The notary certifies that everyone appeared, showed identification, and took their oaths.
The finished affidavit creates a legal presumption that the codicil was properly executed. The court can accept it at face value instead of investigating the signing. It doesn’t prevent a challenge based on fraud or undue influence, but it removes the most common procedural obstacle.
Self-proving affidavits are available in nearly every state. Maryland, Ohio, Vermont, and the District of Columbia are the exceptions. Everywhere else, the notary fee typically runs between $2 and $15.
States Where Notarization Can Replace Witnesses
Some states have adopted an updated version of the Uniform Probate Code that offers a choice. You can have two witnesses sign the codicil, or you can acknowledge the codicil before a notary public. Under that approach, notarization isn’t just optional insurance. It’s a standalone alternative to witnessing.
The relevant provision allows a will or codicil to be valid if it is in writing, signed by the testator, and “acknowledged by the testator before a notary public or other individual authorized by law to take acknowledgments.” Not every state has adopted it. In the ones that have, someone who cannot easily line up two disinterested witnesses can accomplish the same thing at a notary’s desk.
This is a relatively recent development, and it surprises people who assume the two-witness rule is universal. Check your own state’s statute before relying on it.
Handwritten Codicils
Roughly half of U.S. states recognize holographic wills: handwritten documents that need no witnesses. In those states, a codicil written entirely in your own handwriting and signed by you can be valid without either witnesses or a notary.
The requirement is strict. The signature and all substantive provisions have to be in your handwriting. A typed codicil with a handwritten signature does not qualify. Because no witnesses vouch for the document, holographic codicils also face closer scrutiny in probate, sometimes requiring handwriting analysis or testimony from people who know your writing.
You also cannot attach a self-proving affidavit to a holographic codicil, since the affidavit needs witnesses. So the handwritten route trades convenience now for possible complications later.
The Witness Mistake That Destroys Gifts
The rule that trips people up is the requirement that witnesses be “disinterested.” If someone named as a beneficiary in the will or codicil also serves as a witness, most states treat them as an “interested” witness, and the consequences can be severe.
Under the majority approach, the codicil itself stays valid, but the interested witness forfeits some or all of their gift. The reasoning is that a beneficiary who also witnessed the document had a motive to pressure the testator, so the law removes the reward. Some states strip the entire gift. Others reduce it to whatever the witness would have inherited under the state’s intestacy rules.
A minority of states, including California and Texas, are more flexible. Courts there look at the testator’s intent and the circumstances of the signing before deciding whether to cut or eliminate the bequest.
The practical answer: use witnesses who have nothing to gain from your estate. A neighbor, a coworker, a friend not mentioned in the document. This is one of the most avoidable mistakes in estate planning and it wipes out gifts more often than most people realize.
When to Skip the Codicil and Write a New Will
A codicil works best for genuinely small changes: replacing an executor, adjusting a specific dollar amount, adding a modest bequest. Once you are making multiple changes, adding or removing beneficiaries, or working with a will that already has a codicil or two attached, drafting a new will is usually the better call.
Stacking codicils forces the probate court to read them alongside the original will, reconcile any conflicts, and figure out how each amendment interacts with the others. That creates ambiguity, and ambiguity invites challenges. If a codicil removes a beneficiary who appeared in the original will, the court may still require notice to that person during probate, opening the door to a contest a clean new will would have avoided.
A new will also makes your executor’s job simpler. One self-contained document instead of several. The execution requirements are identical, so a new will costs you no extra formality; either way, signing in front of two disinterested witnesses (and, ideally, a notary for the self-proving affidavit) is what makes the document hold up.