Does a Power of Attorney Expire? Death, Revocation, and Time Limits in Wyoming

A power of attorney is not forever — and knowing exactly when yours stops working matters as much as setting it up correctly. Families get into expensive trouble at both ends: agents who keep acting after their authority legally ended, and principals who assume an old document still does the job.

Here is every way a power of attorney ends under Wyoming law.

No, a POA Does Not Expire From Age Alone

A properly executed Wyoming power of attorney has no built-in expiration date. It does not lapse after one year, five years, or twenty. It remains valid until one of the termination events below occurs.

That said, stale documents create practical problems. Banks and title companies are suspicious of POAs signed decades ago, and some ask for a fresh Agent's Certification confirming the document is still in effect (W.S. § 3-9-302). If your POA predates January 1, 2018 — when Wyoming adopted the Uniform Power of Attorney Act — it also operates under older default rules and is worth reviewing or replacing.

Death Ends Everything — Immediately

This is the hard rule families most often get wrong: every power of attorney terminates the instant the principal dies (W.S. § 3-9-110). Durable or not, immediate or springing — death ends it.

That means the day your parent dies:

• The agent can no longer pay bills from the parent's accounts, transfer property, or sign anything in the parent's name.
• Bank accounts titled solely in the decedent's name become estate assets, managed by an executor or claimed through small-estate procedures.
• Any transaction the agent completes after learning of the death has no legal authority behind it.

One nuance: under W.S. § 3-9-110, termination is not effective against an agent or third party until they have actual knowledge of the death or revocation. Good-faith actions taken without that knowledge remain valid. But once you know, you stop — full stop.

After death, authority shifts to Wyoming's estate procedures. If the estate is under $400,000 (the threshold raised by 2025 Senate File 0104), heirs can often skip probate entirely using the Wyoming small estate affidavit for personal property or summary distribution for real estate and mineral interests.

Revocation: The Principal Cancels It

A principal who still has mental capacity can revoke a power of attorney at any time, for any reason. The revocation must be in writing. For POAs involving real property, W.S. § 34-1-105 requires the written revocation to be recorded in the same county clerk's office where the original POA was recorded.

The critical trap: revocation is not effective against the agent or third parties until they actually know about it. Mailing a revocation letter to your ex-agent but never telling your bank means the bank can honor the old document in good faith. A proper revocation notifies the agent, every financial institution, and anyone else holding a copy. Our step-by-step process is in how to revoke a power of attorney in Wyoming.

Other Ways a Wyoming POA Terminates

Under the Uniform Power of Attorney Act, authority also ends when:

• The document's own terms end it. A POA written for a specific purpose ("to close on the sale of my property at 123 Main Street") or a specific period expires when that purpose is accomplished or the period passes.
• The agent resigns, dies, or becomes incapacitated — and no successor agent was named. This is why naming at least one successor agent is not optional in practice.
• The principal's incapacity ends a non-durable POA. Wyoming POAs executed after January 1, 2018 are durable by default (W.S. § 3-9-104), so this mainly affects pre-2018 documents or POAs that explicitly opted out of durability.
• A court acts. If a conservator is appointed for the principal, the agent's authority is not automatically canceled, but the agent becomes accountable to the conservator — and a court can terminate or limit the POA in protective proceedings.

What Happens When Nobody Can Act Anymore

When a POA ends and the principal is alive but incapacitated, the family falls back to guardianship or conservatorship court — filing fees, bonds, annual reports, and attorney costs that a valid POA would have avoided. When it ends because the principal died, the estate process takes over.

Either way, the transition is the dangerous moment: bills still need paying, property still needs managing, and the person who was handling it yesterday has no authority today.

Keep the Chain Unbroken

The practical fix is redundancy. Name a successor agent. Tell your bank who the successor is. If you revoke, revoke in writing and notify everyone. And if the principal dies, the agent should hand the file — ledgers, receipts, account records — to whoever takes over the estate.

The Wyoming Power of Attorney Kit includes a revocation tracker, a copy-distribution tracker (so you know exactly who holds your documents and who to notify), and the successor-agent provisions that keep authority continuous. It is built to handle the endings as carefully as the beginning.

See more Wyoming guides →