A client came into my Manhattan office last week with a will she’d signed in 2012. In the years since, her husband had passed, a new grandchild was born, and the person she’d named as executor had moved to Florida. “Can’t I just write in the changes?” she asked. It’s a logical question. The legal tool for this amendment is a codicil, and while it was once common, its use today requires careful thought.
A codicil is a separate legal document that modifies, amends, or adds to an existing will—a legal postscript. To be valid, it must be executed with the same formalities as the will. But just because you can use a codicil does not mean you should. The decision weighs convenience against the potential for future conflict, a central theme in all legacy planning.
The Proper—and Limited—Use of a Codicil
Historically, codicils were indispensable. When a will was a 20-page document typed on a manual typewriter, redoing the entire instrument to change one beneficiary was impractical. A one-page codicil was an efficient method. With modern digital documents, recreating a clean, updated will is often just as simple as drafting and executing a separate codicil.
A codicil can still be appropriate in rare circumstances. It works best for a single, minor, and unambiguous change. Examples include:
- Changing a Fiduciary: Replacing an executor, trustee, or guardian who can no longer serve due to age, health, or relocation.
- A Minor Specific Bequest: Adding a small cash gift to a new person or charity, or gifting a specific piece of jewelry or art that was not previously mentioned.
- Clarifying an Ambiguity: Correcting a typographical error or clarifying a vague phrase in the original will, though this is often a sign the will itself could be improved.
Even in these cases, the change must be simple and self-contained. If the amendment has ripple effects—for instance, if changing one bequest alters the total pot of assets available to other beneficiaries—it introduces complexity. And in estate administration, complexity is the parent of litigation.
Execution and the Risk of Error
A codicil is not a casual note. It is a testamentary document, and New York law is strict about its execution. Under Estates, Powers and Trusts Law § 3-2.1, a codicil must be signed by the testator before two witnesses, who must also sign. The testator must declare to the witnesses that the document they are signing is a codicil to their will.
Failure to observe these formalities renders the codicil invalid. We have seen cases in Surrogate’s Court where a heartfelt, handwritten note intending to change a will was disregarded because it lacked witness signatures. The original will was probated as written, and the testator’s final wishes were not honored. This is a tragic and entirely avoidable outcome.
Beyond formal execution, there is a practical risk: a codicil is a separate piece of paper. It must be kept with the original will. If the codicil is lost, stolen, or simply separated and cannot be found after death, the court will have no choice but to probate the original will alone. The intended changes vanish.
Why a New Will Is Often the More Prudent Choice
In my practice, we almost always advise clients to execute a new will rather than a codicil. The risks of using a codicil—confusion, a potential will contest, or the document being lost—typically outweigh the minor convenience it offers.
Executing a new will provides two clear advantages. First, it explicitly revokes all prior wills and codicils, creating a single, authoritative document for your entire estate. Your executor and the Surrogate’s Court do not need to cross-reference multiple documents to piece together your intentions. The plan is consolidated and clear.
Second, executing a new will “republishes” your testamentary plan as of the new date. This re-establishes your capacity and intent, which can be a powerful defense if the will is ever challenged on grounds of undue influence or lack of capacity. It presents a clean slate, a deliberate and final statement of your legacy.
Stewardship. That is the core of this work. It means being a prudent custodian of your family’s future. Creating a clear, unambiguous, and legally sound will is a fundamental act of that stewardship. While a codicil might seem like a simple fix, it often introduces cracks into the foundation of a carefully built plan.
If your life circumstances have changed since you last signed your will, the right first step is not to mark up the old document. It is to have a deliberate conversation about whether your existing plan still serves its purpose. If your will is more than five years old or you’ve experienced a major family or financial event, we can schedule a session to review the document in its entirety and determine the most secure way to reflect your current wishes.
