A power of attorney cannot change a will on its own

A power of attorney (POA) gives one person legal authority to act on behalf of another in financial or medical matters, but it does not include the power to change a will. A will is a separate legal document that only the person who made it — called the testator — can alter or revoke. Even if someone holds a broad power of attorney, they cannot walk into a lawyer's office and rewrite the testator's will without that person's direct involvement and signature.

The confusion arises because a power of attorney can seem very broad. It might allow someone to manage bank accounts, sell property, or make healthcare decisions. But wills are treated differently under law because they involve what happens to a person's property after death. Courts protect this right carefully, requiring that any change to a will come directly from the person who made it, in their own mind and of their own free will.

If the testator becomes mentally unable to change their will — for example, due to dementia or a stroke — the power of attorney holder cannot step in and do it for them. The will remains as it was written, unless a court process called a guardianship or conservatorship is opened, which is a separate and more formal proceeding.

Key Takeaways

  • A power of attorney does not grant authority to change, revoke, or create a will, even if the POA document uses broad language.
  • Only the person who made the will can change it, and they must do so while mentally capable of understanding what they are changing.
  • If someone becomes unable to change their will and no guardianship exists, the will cannot be legally altered by anyone else.
  • A power of attorney can be used to carry out the instructions in a will after the person dies, but only by an executor or administrator appointed by the court.
  • If you need to change a will on behalf of someone who is no longer able, you will need to pursue a guardianship or conservatorship through the court system.

When a power of attorney holder might manage property under a will

After someone dies, their will goes through a court process called probate. During probate, the person named as executor in the will — or an administrator appointed by the court if there is no will — takes control of the estate's property. A power of attorney ends when the person dies, so it plays no role in probate itself.

However, there is a window between when someone becomes unable to manage their own affairs and when they die. During that time, a power of attorney holder can manage the person's property, pay their bills, and handle their finances. This is different from changing the will. The POA holder is straightforward keeping things running according to the person's existing wishes, not rewriting those wishes.

If the person recovers mental capacity, they can revoke the power of attorney and take back control. If they die, the power of attorney expires and the executor or administrator takes over based on what the will actually says.

What happens if someone wants to change their will but cannot

If a person becomes mentally incapable of changing their will — because of illness, injury, or cognitive decline — and no power of attorney was in place beforehand, the only legal path forward is through the court. A family member or concerned person can petition the court to open a guardianship (for personal decisions) or conservatorship (for financial decisions), depending on the state's terminology.

A guardianship or conservatorship is a formal court process that takes weeks or months. The person seeking it must show clear evidence that the testator cannot make decisions for themselves. A judge reviews the evidence, often appoints a doctor to evaluate the person, and then decides whether to grant the guardianship. If granted, the guardian or conservator gains broad authority to make decisions on behalf of the incapacitated person — including, in some cases, the authority to change their will.

Even with a guardianship in place, changing a will is not automatic. The guardian must usually go back to court and show that changing the will is in the person's best interest. This is a higher bar than straightforward having the power to do it. Courts are cautious about will changes because they affect who inherits property, and judges want to be certain the change reflects what the incapacitated person would have wanted, not what the guardian wants.

The difference between a power of attorney and a guardianship

A power of attorney is a document that one person signs while they are still mentally capable, giving another person authority to act on their behalf. It is voluntary and can be revoked at any time. It takes effect when ready (or on a date the person chooses) and does not require court involvement.

A guardianship or conservatorship is a court order that one person obtains on behalf of another who is already incapacitated. It requires a petition, evidence, a hearing, and a judge's decision. It cannot be revoked by the incapacitated person — only by the court — and it gives the guardian broader authority than a typical power of attorney. Because it is more powerful and more restrictive of the incapacitated person's rights, it requires court oversight.

If someone wants to make sure their will can be changed if they become unable to do so themselves, the best time to plan is while they are still mentally capable. They can execute a power of attorney that specifically authorizes the agent to change the will, or they can set up a living trust that can be amended more easily than a will. They can also leave detailed instructions about what they would want if circumstances change.

How to change a will while you still can

If you are the person who made the will and you want to change it, you do not need a power of attorney. You can change your will directly by signing a new will, signing an amendment called a codicil, or in some states, by crossing out and initialing changes on the existing will (though this method is risky and not recommended).

The safest approach is to work with an attorney to draft a new will or codicil. This ensures the document meets your state's legal requirements and reduces the chance that someone will later challenge the change. You must be mentally capable of understanding what you are changing and why. If you are unsure whether you have the mental capacity to make this decision, talk to your doctor before you meet with a lawyer.

If you are concerned that you might become unable to change your will in the future, you can also create a living trust. A living trust can be amended more easily than a will and does not require court involvement. You can name a successor trustee to manage the trust if you become incapacitated, and that trustee can make changes to the trust according to the instructions you leave.

What to do if you hold a power of attorney and the testator wants to change their will

If you hold a power of attorney and the person who gave it to you wants to change their will, your role is to help them do so, not to do it yourself. Encourage them to meet with an estate attorney. You can help by driving them to the appointment, gathering documents they might need, or paying the attorney's fee from their account using your POA authority — but the testator must be present and must sign the new will themselves.

If the testator is no longer mentally capable of changing their will and you believe a change is necessary, you cannot do it through the power of attorney. You would need to petition the court for a guardianship or conservatorship. This is a significant step and should only be taken if you genuinely believe it is in the person's best interest and if you have evidence to support that belief.

If you are unsure whether the testator is mentally capable, or if you are worried about the legal consequences of your actions, consult an estate attorney. They can advise you on what you can and cannot do under the power of attorney and what steps would be necessary if a will change becomes necessary.

Frequently Asked Questions

Can I use a power of attorney to change someone else's will if they ask me to?

No. Even if the person asks you to change their will and you have a power of attorney, you cannot do it. The testator must change their own will by signing a new document or amendment. A power of attorney does not override this requirement. If the person is asking you to change their will, they are mentally capable enough to do it themselves, so encourage them to work with an attorney.

What if the power of attorney document says I can change the will?

It does not matter what the power of attorney says. State law does not allow a power of attorney to grant authority over a will, regardless of the language in the document. A clause attempting to give that authority is void and unenforceable. If you try to change a will using such a clause, the change can be challenged in court and may be reversed.

Can a power of attorney be used to revoke a will?

No. Revoking a will is the same as changing it — only the testator can do it. A power of attorney cannot revoke a will, even if the testator is no longer capable of doing so themselves. If the testator wants to revoke their will while they are still mentally capable, they can do so by signing a revocation document or by destroying the will. After that, a new will can be written if desired.

What should I do if I have a power of attorney and the person becomes unable to change their will?

If you believe a will change is necessary and the person is no longer mentally capable, consult an estate attorney about whether a guardianship or conservatorship is appropriate. These are formal court processes that take time and money, so they should only be pursued if there is a genuine need and clear evidence of incapacity. An attorney can help you understand whether this step is necessary and what it involves.

Can I change my own will if I have given someone a power of attorney?

Yes. Giving someone a power of attorney does not prevent you from changing your own will. You can change your will at any time while you are mentally capable, regardless of who holds your power of attorney. The power of attorney is a separate document and does not affect your authority over your will.