How to Revoke a Power of Attorney in Montana

Your parent signed a power of attorney two years ago naming your brother as agent. Now your brother is making financial decisions your parent disagrees with, or your parent simply wants to switch agents. The question that stops most families cold: can you actually undo this?

Yes. Under Montana's Uniform Power of Attorney Act (Title 72, Chapter 31), a principal who retains cognitive capacity can revoke a power of attorney at any time, for any reason, without court approval.

But the revocation only works if you follow the right steps. A verbal "you're fired" means nothing to the bank holding your parent's accounts.

The Legal Standard for Revocation

Montana law is clear: a power of attorney terminates when the principal revokes it in writing. The revocation must be signed and notarized, just like the original document.

Three critical requirements:

• The principal must have capacity. If your parent has lost the cognitive ability to understand what revocation means, they cannot revoke the document themselves. At that point, only a court can modify or terminate the agent's authority through a guardianship proceeding.
• Written notice must reach the agent. The revocation is not effective against the agent until they receive actual notice. If the agent acts in good faith before learning about the revocation, those actions remain legally valid.
• Third parties need notice too. Banks, brokerage firms, and medical providers who have copies of the original power of attorney will continue honoring it until they receive written notice of the revocation.

Step-by-Step Revocation Process

Step 1: Draft the revocation document. State the principal's full legal name, reference the original power of attorney by date, and clearly declare that the document is revoked. Have it notarized.

Step 2: Deliver written notice to the agent. Send the revocation via certified mail with return receipt requested. Keep the receipt — it proves the agent received notice on a specific date.

Step 3: Notify all third parties. Send copies to every institution that received the original power of attorney: banks, investment firms, the county clerk and recorder (if the original was recorded for real property transactions), medical providers, and insurance companies.

Step 4: Register the revocation. If your parent filed their healthcare power of attorney with the Montana End-of-Life Registry through the Attorney General's Office, update or remove the registered directive.

Step 5: Execute a new power of attorney. Revoking the old document without naming a replacement agent leaves your parent with no designated decision-maker. If they want a new agent, execute a fresh document immediately.

Common Mistakes That Invalidate the Revocation

Tearing up the original copy. Destroying the document in your parent's possession does nothing about copies held by banks, attorneys, and county offices. Without written notice, those institutions will continue accepting the agent's authority.

Verbal revocation only. Montana law requires a written, notarized revocation. Telling the agent "you're no longer in charge" has no legal force.

Failing to notify the county recorder. If the original power of attorney was recorded with a Montana county clerk and recorder to authorize real property transactions, the revocation must also be recorded. Otherwise, the agent could still sign deeds or mortgage documents.

When Revocation Gets Complicated

Family conflict makes this harder. If the current agent refuses to acknowledge the revocation, or if siblings disagree about who should serve, the situation can escalate quickly.

An elder law attorney should be involved if:

• The current agent has already made significant financial transactions that may need to be reversed
• Multiple family members are competing to serve as the replacement agent
• There is any question about whether the principal still has the cognitive capacity to execute a revocation

The Montana Power of Attorney & Guardianship Kit walks through the full revocation process and provides the notification templates you need to make sure banks and institutions actually honor the change.

Revoking a Healthcare Power of Attorney

The process for revoking a healthcare power of attorney mirrors the financial version, with one addition: notify the parent's primary care physician, hospital network, and any specialists currently involved in their care. If the healthcare directive was registered with the Montana End-of-Life Registry, updating that registration ensures emergency medical providers access the current document rather than the revoked one.

Montana law treats the healthcare power of attorney and living will as separate instruments. Revoking one does not automatically revoke the other. If your parent wants to change their healthcare agent but keep their end-of-life treatment preferences intact, the revocation should specify exactly which document is being terminated.

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