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Last Will And Testament Guide

Codicils: Making Small Changes to Your Will

A codicil is a legal document that modifies, adds to, or revokes parts of your existing will. It is a practical way to make minor updates without creating a new will from scratch. This guide explains what codicils are, when they are appropriate, and how to create one correctly.

Last updated 2026-08-10 · WillForms Guide Guides

What Is a Codicil and When Should You Use One?

A codicil is a separate legal document that amends your will. It must be executed with the same formalities as a will, such as being in writing, signed, and witnessed according to your state's laws. You can use a codicil to add a new beneficiary, change an executor, update a bequest, or revoke a specific clause.

Codicils are best for small, straightforward changes. For example, if you want to leave your antique watch to a different person or change the amount of a cash gift, a codicil works well. However, if you need to make many changes or restructure your estate plan, a new will is often clearer and safer.

One advantage of a codicil is that it leaves your original will intact, which can be less confusing than a heavily amended document. But be aware that codicils can sometimes create inconsistencies. If your changes are extensive, a new will may be more straightforward and reduce the risk of legal challenges.

  • Use a codicil for minor updates like changing an executor or adding a beneficiary.
  • Avoid codicils if you are changing a large portion of your will or if your family situation has changed dramatically.
  • State rules vary, but most require the codicil to be signed and witnessed similarly to a will.
  • Always keep the codicil with your original will to ensure both are found together.

How to Write a Codicil: Step-by-Step

Writing a codicil requires precision. Start by clearly stating that you are creating a codicil to your last will and testament, and reference the date of your original will. Then, specify exactly which clause or provision you are changing, adding, or revoking.

Use plain language but be specific. For example, instead of saying 'I change my will,' write 'I revoke the bequest to my nephew John and instead give that amount to my niece Sarah.' This avoids ambiguity. If you are adding a new provision, state it in full.

After drafting the codicil, you must sign it in the presence of witnesses, just as you did for your will. The number of witnesses and any notarization requirements depend on your state. Some states allow a self-proving affidavit, which makes probate easier. Check your local laws or consult an attorney to ensure compliance.

  • Start with a clear title: 'Codicil to the Last Will and Testament of [Your Name]'.
  • Reference the original will by date to avoid confusion.
  • Number each change and be explicit about what is being modified.
  • Sign and date the codicil in the presence of witnesses.
  • Store the codicil with your original will in a safe place.

Common Mistakes to Avoid with Codicils

One of the most common mistakes is using a codicil for major changes, like disinheriting a child or changing the distribution of your entire estate. Such significant changes are better handled with a new will to prevent conflicts and legal disputes.

Another mistake is failing to properly execute the codicil. If it is not signed and witnessed as required by law, it may be invalid, and your original will remains unchanged. This can cause confusion and unintended consequences.

Also, be careful not to create inconsistencies between the codicil and the original will. For example, if you change the executor in the codicil but leave other references to the old executor, a court may have to interpret your intent. Always review the entire will after making a codicil to ensure coherence.

  • Do not use a codicil to make sweeping changes—draft a new will instead.
  • Ensure the codicil is properly signed and witnessed; otherwise, it is void.
  • Check for conflicts with the original will and resolve them.
  • Do not attempt to amend a will by handwriting notes in the margins; that can invalidate the will.
  • If you are unsure, consult an estate planning attorney.

Codicils vs. Living Wills: Know the Difference

People often confuse a codicil with a living will. A living will is a document that states your healthcare preferences if you become unable to communicate. It is not a part of your estate plan and does not distribute your property. A codicil, on the other hand, amends your last will and testament, which deals with your assets and guardianship of minor children.

Both documents are important but serve different purposes. If you need to change your healthcare directives, you would create a new advance directive or amend that specific document, not your will. Similarly, if you need to update your will, a codicil is one method, but you would not use it for healthcare decisions.

When planning your estate, keep these documents separate. Your will and any codicils should be stored together, but your living will and other healthcare documents should be accessible to your family and medical providers. Make sure you understand the distinction to avoid legal and personal confusion.

  • A living will is about medical treatment, not property distribution.
  • A codicil only modifies your will—it does not address healthcare.
  • Store your will and codicils together; keep living wills with your healthcare papers.
  • Review both your will and living will periodically to ensure they reflect your current wishes.

State Requirements and Legal Validity of Codicils

State rules vary, but most states require a codicil to be signed and witnessed in the same manner as a will. Typically, you need at least two witnesses who are not beneficiaries. Some states also allow a notary public to acknowledge your signature, which can make the document self-proving and speed up probate.

If you do not follow your state's formalities, the codicil may be invalid, and your original will remains in effect. This can lead to your intended changes being ignored. To avoid this, research your state's specific laws or consult an attorney who specializes in estate planning.

Also, note that a codicil does not need to be notarized to be valid in many states, but notarization can help. If you are unsure about the requirements, it is wise to seek professional help. The cost of an attorney is often worth the peace of mind that your wishes will be honored.

  • Check your state's requirements for witnesses and notarization.
  • Witnesses should not be beneficiaries or spouses of beneficiaries.
  • Consider a self-proving affidavit to simplify probate.
  • If you move to a new state, review your will and codicils to ensure they comply with local laws.

When to Consider a New Will Instead of a Codicil

A new will is often a better choice if you have experienced major life events, such as marriage, divorce, the birth of a child, or the death of a beneficiary. These changes can affect your entire estate plan, and a single codicil may not adequately address the new circumstances.

Also, if you have made multiple codicils over the years, your will may become a patchwork of amendments that is difficult to interpret. In such cases, a complete rewrite can simplify your estate plan and reduce the risk of disputes. A new will supersedes all previous documents, providing a clean start.

Finally, if you want to change the overall structure of your estate plan, such as setting up a trust or changing how your assets are divided, a new will is more appropriate. An attorney can help you draft a comprehensive will that reflects your current wishes and avoids the pitfalls of piecemeal amendments.

  • Consider a new will after major life changes like marriage or divorce.
  • If you have several codicils, a new will may be clearer.
  • For structural changes, such as creating a trust, draft a new will.
  • Always review your estate plan regularly and update it as needed.

Sources & references

For further reading, see these general legal resources from the Cornell Legal Information Institute.

External links open in a new tab. These sources are provided for general information only and are not legal advice.

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Frequently asked questions

Can I write a codicil myself without a lawyer?

Yes, you can write a codicil yourself if the changes are minor and you follow your state's execution rules. However, a lawyer can help ensure your codicil is valid and does not conflict with your original will. If you have any doubts, consult an attorney.

How many witnesses do I need for a codicil?

State rules vary, but most states require two witnesses who are not beneficiaries. Some states also allow a notary public. Check your local laws to be sure.

What happens if I write a codicil but don't sign it properly?

If the codicil is not signed and witnessed as required, it is likely invalid. Your original will remains in effect, and your intended changes will not be honored. Always follow the legal formalities.

Can a codicil revoke an entire will?

No, a codicil is meant to amend, not revoke, a will. To revoke a will, you must create a new will or execute a formal revocation document. If you want to start over, draft a new will and state that it revokes all previous wills and codicils.

State-specific last will and testament guides

Every state has different rules. See the detailed guides for your state.