A few years ago, a client from Manhattan appointed her brother as her agent under a Power of Attorney. It seemed like the prudent choice. He was family, lived nearby, and was financially stable. But then he went through a contentious divorce and started a struggling business. My client no longer felt comfortable with him having direct access to her life savings. She called me with a simple, urgent question: “How do I take this power back?”
Granting a Power of Attorney is an act of profound trust. You give another person—your “agent”—the authority to make financial decisions on your behalf. But trust is not static. Relationships fray, an agent’s circumstances change, or you may simply decide another person is better suited for the role. Revoking a Power of Attorney is your right, but it must be done with precision. A casual conversation or an email is not enough to legally sever that authority.
The Intentional Act of Revocation
A Power of Attorney is a formal legal instrument; its revocation must be equally formal. The principle is clear: the revocation must be in writing and delivered to the agent. Without proper notice, an agent could continue to act on your behalf, and third parties like banks would have no reason to question their authority. The burden is on you, the principal, to make your intent to revoke unmistakably clear.
The process involves these critical steps:
- Draft a Formal Revocation. We prepare a document called a “Revocation of Power of Attorney.” This instrument clearly identifies you, your former agent, and the date the original POA was signed. It contains unambiguous language stating that you revoke all authority granted in that document.
- Sign and Notarize. Like the original POA, the revocation must be signed, dated, and notarized. This formality proves your identity and your intent on a specific date.
- Deliver Notice to the Agent. This step is non-negotiable. The revocation is not effective until the agent receives it. We send the document via certified mail with a return receipt requested to create a paper trail proving the agent was formally notified.
- Notify Third Parties. You must also notify any institution that has a copy of your old POA. This includes your bank, brokerage firm, and financial advisor. Providing them with a copy of the notarized revocation puts them on notice not to accept instructions from your former agent.
Failing to notify third parties is a common and costly mistake. If your bank does not know you revoked the POA, and your former agent walks in and withdraws $20,000, the bank may be protected because it acted in good faith. You are the one left to deal with the consequences.
The Legal Foundation in New York
This process is grounded in New York law. The rules governing Powers of Attorney are in the General Obligations Law. Specifically, N.Y. Gen. Oblig. Law § 5-1511(1)(b) requires a principal to revoke a Power of Attorney by executing a written revocation that is signed and acknowledged with the same formality as the original document.
The law also protects third parties who act in good faith without actual knowledge of the revocation. This is why providing direct, written notice to your financial institutions is not a suggestion—it is a critical step in protecting your assets. It shifts the legal responsibility from you to them, as they can no longer claim ignorance.
What if the principal no longer has mental capacity? Here, the law is unforgiving. A person must have the same capacity to revoke a POA as they did to create it. If a principal has advanced dementia, for example, they can no longer sign a legal revocation. The family’s only recourse may be a difficult and public guardianship proceeding in Surrogate’s Court to have the agent removed. It is a stark reminder of why acting decisively, while you still can, is so important.
Appointing a New Custodian for Your Legacy
Revoking a Power of Attorney often goes hand-in-hand with appointing a new one. Life requires a contingency plan. If you remove one agent, it is wise to deliberately choose another person to act as your fiduciary should you become unable to manage your own affairs.
This decision is a cornerstone of your legacy. It is about stewardship. Who do you trust, without reservation, to handle your finances with the same care you would? Who has the integrity and organizational skills to manage your accounts, pay your bills, and protect your assets? Choosing an agent should be a deliberate, thoughtful process—not a default decision based on birth order or geography.
Circumstances change, and your estate plan must be resilient enough to change with them. Revoking an old Power of Attorney is not a sign of failure; it is an act of responsible stewardship. It shows you are actively managing your affairs and ensuring the person with power is the right person for the job.
If your Power of Attorney names an agent you no longer trust, that document is a liability. The first step is to bring it to our office for a confidential review of your legal options for revocation and the appointment of a new fiduciary.





