Marriage by itself does not let you override a power of attorney your husband or wife signed. The agent’s authority comes from the principal—the person who signed—and only the principal, or a court, can take it away. That said, you are not without options. Depending on your situation, you may be able to revoke the document, petition a court to remove or restrict the agent, block transactions involving marital property, or seek a guardianship that supersedes the agent entirely.
Why Being the Spouse Isn’t Enough on Its Own
A power of attorney creates a legal relationship between two people: the principal who grants authority, and the agent who receives it. The agent’s duty runs to the principal, not to the principal’s family. A spouse, an adult child, a sibling—none of them have veto power over the agent simply because they are related. This surprises many families, especially when the agent is an adult child or a professional fiduciary making decisions the spouse disagrees with.
Once a POA is validly executed—signed by a competent principal, voluntarily, with the required notarization or witnesses—the agent’s authority is legally binding. You cannot walk into a bank and declare it invalid because you are the spouse. You need either the principal’s cooperation or a court order.
If You Signed the POA, You Can Revoke It
The simplest case is when the spouse who wants to undo the POA is also the person who created it. If you signed the document and you are still mentally competent, you can revoke it at any time without going to court. The process varies by state but generally involves a written revocation, notarization, and written notice to the agent and to any third parties—banks, brokerages, healthcare providers—that have been relying on the document. If the original POA was recorded with a county register of deeds, record the revocation in the same office.
Competence at the moment of revocation is the whole ballgame. If there is any question about your capacity, the revocation can be challenged later. Having a physician document your competence around the date you sign the revocation provides useful protection.
When the Principal Is Someone Else: Going to Court
If your spouse is the principal and cannot or will not revoke the document themselves—often because they have lost capacity—your route is a court petition. In states following the Uniform Power of Attorney Act, a spouse has explicit statutory standing to bring one. Section 116 of the act allows the principal’s spouse, parent, or descendant to petition a court to interpret the POA or review the agent’s conduct and grant appropriate relief.1Uniform Law Commission. Uniform Power of Attorney Act
“Appropriate relief” is broad. A court can order the agent to produce a full accounting, restrict the agent’s authority, remove and replace the agent, or revoke the POA outright. Standing to file, however, is not the same as winning. You need a real legal ground, not just disagreement with the agent’s judgment.
Grounds Courts Actually Accept
Courts take the principal’s autonomy seriously. If a competent adult chose a particular agent, judges will not second-guess that choice lightly. A successful challenge usually rests on one of the following:
- Incapacity at execution. If the principal lacked the mental ability to understand the POA at the time they signed it, the document was never valid. Medical records and physician testimony documenting dementia, Alzheimer’s, or similar conditions around the signing date support this argument.
- Breach of fiduciary duty. The agent owes duties of loyalty, care, and good faith. Using the principal’s money for personal benefit, failing to keep records, commingling the principal’s funds with their own, or making reckless investment decisions all qualify.
- Fraud or undue influence. If someone pressured, manipulated, or deceived the principal into signing, the document can be invalidated. This comes up often when an adult child isolates an aging parent from the other spouse before securing a signature.
- Financial exploitation. Many states specifically define the misuse of a power of attorney as a form of elder financial exploitation, with both civil and criminal consequences.2U.S. Department of Justice. Elder Abuse and Elder Financial Exploitation Statutes
The evidentiary bar varies. Some states require clear and convincing evidence, particularly for fraud claims or challenges to the validity of a signed document; others apply the ordinary preponderance-of-the-evidence standard used in most civil cases. Either way, you need documentation, not suspicion. Bank statements, financial records, and testimony from people who witnessed the principal’s condition or the agent’s behavior carry far more weight than a feeling that something is wrong.
Marital Property Rights the Agent Cannot Ignore
Even when you cannot override the POA itself, your existing property rights can limit what the agent is legally allowed to do. This is an independent source of leverage and one where agents frequently overreach.
In the nine community property states—Arizona, California, Idaho, Louisiana, Nevada, New Mexico, Texas, Washington, and Wisconsin—both spouses are presumed to share equal ownership of assets acquired during the marriage. An agent acting under a POA for one spouse generally cannot sell, transfer, or encumber community property without the other spouse’s consent. If the agent tries, you can challenge the transaction regardless of what the POA says.
Outside community property states, jointly titled assets create similar constraints. An agent cannot unilaterally drain a joint bank account or sell a home where both spouses are on the deed. The POA grants authority over the principal’s interests only, and in a jointly held asset the principal’s interest is typically half.
Gifts are another flashpoint. Under the Uniform Power of Attorney Act, an agent’s authority to give away the principal’s property is limited by default and generally must be explicitly authorized in the document.1Uniform Law Commission. Uniform Power of Attorney Act If the POA does not specifically grant gift-making authority, the agent has no legal basis for transferring the principal’s assets to anyone, including themselves. Unauthorized gifts are strong grounds for a court challenge.
Healthcare Decisions: The Agent Usually Outranks You
When a healthcare POA (sometimes called a healthcare proxy or advance directive) names someone other than the spouse as the medical decision-maker, that named agent has legal priority. Without any advance directive in place, most states default to a hierarchy of surrogate decision-makers with the spouse at the top. A healthcare POA overrides that default. The principal chose someone, and courts treat that choice as a direct expression of the principal’s wishes.
You can still petition a court if the agent’s medical decisions clearly contradict the principal’s known wishes—for example, if the principal consistently expressed preferences about end-of-life care that the agent is ignoring. Courts give weight to a spouse’s testimony about prior conversations, written statements, and religious beliefs in that situation. But absent evidence of that kind of conflict, disagreement with the agent’s medical judgment is not enough.
Start by Demanding an Accounting
Before filing a court challenge or a guardianship petition, there is a lower-cost first step. Under the Uniform Power of Attorney Act, agents must keep records of every action they take on the principal’s behalf. The principal, their guardian or conservator, and in many states interested parties such as a spouse can demand those records.
An agent who refuses to produce an accounting when properly asked is already violating their duties, which gives you the kind of evidence courts want to see in a removal petition. Sometimes the demand alone is enough to change the agent’s behavior. Other times the records themselves reveal the undisclosed transactions, missing funds, or self-dealing that justify going further.
Guardianship as a Last Resort
When the principal is incapacitated, cannot revoke the POA themselves, and the agent is causing real harm, the strongest tool available is petitioning for guardianship (called conservatorship in some states). If a court appoints you or another suitable person as guardian, that person gains legal authority over the principal’s affairs and can then ask the court to terminate the agent’s authority under the POA.3Administration for Community Living. Power of Attorney Revocations 101
This is not a shortcut. Guardianship proceedings require a court hearing, medical evidence of incapacity, and often a professional evaluation. Filing fees alone typically run several hundred dollars, and attorney fees can push the total into the thousands. Courts also take guardianship seriously because it strips an adult of autonomy; judges want to see that less restrictive options, like petitioning to remove the agent, have already been considered.
In urgent situations where the agent is actively causing financial or personal harm, courts can grant temporary injunctive relief to freeze the agent’s authority while proceedings move forward. That preserves the status quo and prevents further damage before a final decision.
What Divorce Does to a POA
If the principal and the agent were married to each other and later divorce, many states automatically terminate the agent’s authority. That rule reflects the intuition that a person who named their spouse as agent before a divorce probably would not want that arrangement to continue afterward.3Administration for Community Living. Power of Attorney Revocations 101
Not every state has this automatic-termination rule, though, and even where it exists, third parties like banks may not know about the divorce and may keep honoring the old POA. The safer course is to execute a formal written revocation during the divorce and notify every institution that has a copy of the original document. When a five-minute revocation eliminates all ambiguity, relying on an automatic legal rule is a gamble.