If you already have a will and want to make a small change, you do not have to start over. In New York, you change a will with a codicil — a short, separate legal document that amends specific parts of your existing will while leaving the rest in place. The catch, and it is an important one, is that a codicil is not a casual note or a handwritten edit in the margin. To be valid, a codicil must be signed and witnessed with the same formality as the will itself, under New York’s Estates, Powers and Trusts Law (EPTL) §3-2.1. Get those formalities right and your update is legally binding; get them wrong and a court may ignore the change entirely. This essentials guide walks you through the basics, step by step, so you can update your will with confidence.
What Is a Codicil?
A codicil is an amendment to a will. Think of it as a clearly labeled add-on: it references your original will, states exactly what you are changing, and is executed (signed and witnessed) just like a will. Because it is a separate signed instrument, a codicil lets you make a targeted update without rewriting the whole document.
Common reasons people in New York use a codicil include:
- Changing or adding a beneficiary (for example, a new grandchild)
- Naming a different executor
- Updating a guardian for a minor child
- Adjusting a specific gift (a dollar amount, a piece of property, an heirloom)
- Removing a gift to someone who has passed away or fallen out of your life
Reassuring truth for first-timers: a properly executed codicil carries the same legal weight as the original will. It does not “weaken” your estate plan — it simply updates it.
The Most Important Rule: A Codicil Must Be Executed Like a Will
This is where people get into trouble, so we will be very clear. Under EPTL §3-2.1, the same execution and attestation requirements that apply to a will apply to a codicil. You cannot simply cross out a line, write a new instruction in the margin, or initial a change. Those informal edits are generally not valid in New York and can create confusion or litigation after death.
Here is what New York law requires for a valid signing:
| Requirement | What it means in practice |
|---|---|
| Two attesting witnesses | At least two witnesses must witness your signing. |
| 30-day window | Both witnesses must sign within one 30-day period (there is a rebuttable presumption this requirement was met). |
| Sign at the end | You (the testator) must sign at the end of the document. Another person may sign for you in your presence and at your direction if you cannot sign yourself. |
| Publication | You must declare to the witnesses that the document is a codicil to your will. |
| Presence or acknowledgment | You sign in the witnesses’ presence, or acknowledge your signature to each of them. |
| Witness signatures + addresses | The witnesses sign at your request and add their residence addresses. |
If any of these steps is missing, the codicil may fail — and your will would then be read as if the change never happened. Because of this, even a “simple” one-line change benefits from professional supervision of the signing.
For a deeper look at the signing mechanics, see our overview of New York will requirements and our guide to the will execution ceremony.
Step-by-Step: Changing Your Will With a Codicil in New York
- Locate your original will. Confirm the date it was signed and read it carefully so the codicil references the correct document.
- Decide exactly what you are changing. Write the change in precise terms — name the beneficiary, the gift, or the executor specifically.
- Draft the codicil. It should identify the original will by date, state which provisions are being amended, revoked, or added, and confirm that all other terms of the will remain in effect.
- Execute it under EPTL §3-2.1. Sign at the end, in front of at least two witnesses, declare it is a codicil to your will, and have the witnesses sign and add their addresses — all within the 30-day window.
- Store it with your will. Keep the codicil physically with the original will so they are found together. A codicil that cannot be located does no good.
Codicil or a Brand-New Will? When to Rewrite Instead
A codicil is ideal for small, isolated changes. But if you are making several changes, or substantial ones, a new will is often the cleaner choice. Stacking multiple codicils on top of one another can create contradictions and make probate more complicated.
Use this quick gut check:
- Use a codicil for one or two narrow updates (swap an executor, adjust a single gift).
- Write a new will for major life events — marriage, divorce, a new child, a big change in assets, or when you already have one or more codicils in place.
Either way, the document only takes effect at death and must be admitted to probate in the Surrogate’s Court. Learn more about your options on our will drafting overview and our page dedicated to codicils and amendments.
A Few Things a Codicil Cannot Fix
A codicil is a powerful tool, but it has limits and common points of confusion:
- It is not a “living will.” A living will is a separate health-care document about end-of-life medical wishes — it does not distribute your property. A codicil amends a property will only. Do not conflate the two.
- It cannot override a spouse’s right of election. Under EPTL 5-1.1-A, a surviving spouse may claim a minimum share of the estate regardless of what your will or codicil says. You cannot simply disinherit a spouse with a codicil.
- It does not help if you have no will at all. If there is no valid will, New York’s intestacy rules under EPTL Article 4 decide who inherits — not you. See our explainer on what happens with no will.
Frequently Asked Questions
Can I just handwrite a change on my existing will?
No. Informal edits, cross-outs, or margin notes are generally not valid in New York. Any change must be made through a separate document executed with the formalities of EPTL §3-2.1.
How many witnesses does a codicil need in New York?
At least two attesting witnesses, just like a will. Both must sign within one 30-day period, and each adds their residence address.
Will a codicil cancel my original will?
No. A codicil amends only the parts you specify. The rest of your original will stays in full force. That is exactly why codicils are useful for small updates.
How many codicils can I have?
There is no fixed legal limit, but as a practical matter, multiple codicils invite confusion and contradictions. If you are on your second or third change, it is usually better to sign a fresh will.
Talk to a New York Estate Planning Attorney
Updating a will should feel reassuring, not risky. The rules under EPTL §3-2.1 are precise, and the smallest misstep at the signing table can undo your intentions. At Morgan Legal Group, Russel Morgan, Esq. and our team help New Yorkers update their estate plans correctly — whether that means a clean codicil or a fresh will.
Ready to make the change the right way? Schedule a 30-minute consultation with Russel Morgan, Esq. and get your will updated with confidence.
Further reading from Morgan Legal Group: the last will and testament in New York.