He Can Still Sign Your Power of Attorney Away

A dementia diagnosis does not remove his right to revoke the power of attorney he gave you. If somebody else is steering him toward it, a dated letter from his own doctor is the first thing to get.

Can he revoke my power of attorney if he has dementia?

If he has capacity at the moment he signs the revocation, yes.

The situation is usually some version of this. Your father, your mother or your husband has dementia, and at some point he named you as his agent under a power of attorney. Somebody else — a sibling, a new partner, a neighbor, a paid caregiver — is now spending a great deal of time with him, and the subject of changing that document has started coming up.

A power of attorney belongs to the person who granted it. He can revoke it, change it, or name somebody else — as long as he has the capacity to understand what he is doing when he does it.

A dementia diagnosis is not a finding of incapacity. Unless a court has ruled otherwise, capacity is presumed. That presumption is there for good reasons: it protects people from having their rights stripped on the strength of a diagnosis. It also means the protection cuts both ways, and right now it may be cutting against you.

So the honest position is that this may be legally possible, and the question becomes whether it is genuinely his decision.

What does capacity actually mean here?

That he can understand the nature and effect of the specific thing he is signing, at the time he signs it. It is task-specific and moment-specific.

This is where families and lawyers talk past each other.

Capacity is not a single global setting. Someone can lack the capacity to manage a portfolio and still have the capacity to decide who he wants to speak for him. He can be lucid in the morning and not by evening. The legal question is narrow: at the moment of signing, did he understand what a power of attorney is, what revoking it does, and who he was appointing instead?

Which is why the attorney who prepares a revocation should be assessing that, and why a revocation signed in an unusual setting, or by an attorney nobody in the family has met, is worth noting.

What does undue influence look like?

Not a single dramatic moment. A pattern, built over weeks, in which somebody makes themselves the only door in and out.

Courts and adult protective services look for a recognizable combination. In the middle of it, people notice individual incidents and miss the pattern.

• Isolation. Visits get harder to arrange. Calls are not returned or are always on speaker. Someone else is now always present. He is moved, or a new living arrangement is proposed that reduces contact.
• A new or intensified dependency. One person is suddenly indispensable — driving him, handling the mail, sitting in on appointments, managing his phone.
• Urgency. Documents that must be signed now, before an appointment, before a relative visits, before the weekend.
• Secrecy. New advisers, new accounts, a new attorney, and reluctance to say who or where.
• A change that benefits the influencer, arriving after the isolation rather than before it.
• A shift in his account of the family — new claims about who took what, who never visits, who cannot be trusted. Sometimes this is the disease. Sometimes it has been fed.

One of these means little. Four of them together, in sequence, is what courts recognize.

What can I do this week?

Write things down, secure the paperwork, tell the institutions, and get your own attorney. In that order.

Start a dated log today. Facts, not conclusions. Dates, times, what was said, who was present, what changed. "Called at 2:10pm, phone answered by X, told me he was sleeping; third time this week." Contemporaneous notes carry weight that a reconstruction written six months later does not.

Gather what you already hold. The original power of attorney, medical records you have access to as agent, bank statements, correspondence. Copy it and keep it somewhere else.

Notify the institutions in writing. Banks, brokerages, the care facility, the insurers. State that you hold a durable power of attorney, that you have concerns about possible undue influence, and ask what their process is if a competing document is presented. Many institutions have an escalation path and will not act on a new document without review. Some will freeze activity pending it.

Get a physician's assessment now. If his capacity is genuinely deteriorating, a specific, dated letter from his own doctor is far more useful than an opinion obtained later. Ask for a letter that describes what he can and cannot understand and manage — not a one-line "has dementia," which tells a court nothing.

Talk to an elder law attorney of your own. Not his attorney. Not the family attorney. Yours, with the document in hand, this week.

Report it if you believe he is being exploited. Adult Protective Services investigates financial exploitation of vulnerable adults and can act more quickly than a court. If money is actively moving, the bank's fraud department and, in serious cases, the police, are also routes.

What does a doctor's letter actually do?

It depends on how the document is written, and in every case it is evidence rather than a ruling.

Powers of attorney fall broadly into two kinds. Some are effective immediately on signing. Others are springing — they activate only when a physician certifies that the principal can no longer manage. Read yours and find out which you have, because if it is springing, that letter is what turns the document on.

Either way, a capacity letter does not by itself invalidate a revocation, and it does not make you the decision-maker over his objection. What it does is establish a documented clinical picture at a point in time, which is exactly what is missing in most of these disputes.

Ask the physician for something specific: what he understands about his finances, whether he can identify who manages his money, whether he can weigh alternatives, whether he is vulnerable to influence. Dated, on letterhead, in the record.

What not to do

Do not move his money, and do not cut off the other person's access. Both are the behavior you are alleging.

Well-meaning families destroy their own case here more often than the other side does.

• Do not transfer his funds "for safekeeping." Even with valid authority, moving money into your own name in the middle of a dispute looks precisely like exploitation, and it will be characterized that way.
• Do not restrict the other person's contact on your own initiative. Isolation is the central element of undue influence. Doing it yourself hands them the argument.
• Do not confront him about it. He is the one person in this who cannot resolve it, and pressing him repeats what is being done to him from the other direction. If he says he wants someone else to handle things, the answer is "all right, I hear you" — and then the work happens elsewhere.
• Do not destroy or hide the original document. Ever.
• Do not send accusatory messages to the other party. Assume everything you write will be read aloud by opposing counsel.
• Do not delay because you hope it resolves. These situations resolve in the direction of whoever is present.

What if it has already been revoked?

Then the fight moves to the courts, and the questions become capacity at signing and undue influence.

A revocation done properly ends your authority immediately, and continuing to act on the old document after notice can expose you personally. Stop acting on it and take advice.

The routes from there:

• Challenge the revocation on grounds of incapacity at the time of signing, undue influence, fraud, or improper execution — a document missing required witnesses or notarization can be void regardless of anything else.
• Petition for guardianship or conservatorship, asking the court to appoint a decision-maker. This is slow, public and expensive, and it is sometimes the only remaining route. Courts appoint the person they judge suitable, which is not automatically the person who filed.
• Seek an emergency or temporary order if money is actively being moved or he is at immediate risk. Ask your attorney specifically about emergency relief, because the ordinary timeline may be too slow.
• Adult Protective Services and the bank, in parallel. They operate on different timelines than litigation.

None of this is quick, and all of it is easier with the log you started in the first week.

The thing underneath

Being accused of being the untrustworthy one, by the person you have been caring for, is its own injury.

It is worth naming, because the practical steps do not touch it.

Many people in this position have been doing the driving, the medications, the appointments and the nights for years, and now find themselves described as the problem — sometimes by him, sometimes in his voice. That lands hard, and it is not made easier by knowing the disease and the influence are doing the talking.

Two things help. Keep the log, because it turns a swirl of incidents into something a professional can act on. And tell somebody outside the family what is happening, so that the version of events being constructed is not the only version anybody hears.