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Who Decides You Have Lost Capacity Under an Alberta EPA?

Learn when an enduring power of attorney takes effect in Alberta, who must declare incapacity, and what happens if family members disagree with the attorney.

Wills & Estates4 min readTSLBy the Treadstone Law Team · AlbertaUpdated November 1, 2026
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Key takeaways
  • An Alberta enduring power of attorney can start right away or only on a contingency such as incapacity, depending on what the document says.
  • If the document names no one to decide, incapacity is established when 2 medical practitioners declare in writing that it has occurred, but a named person in the document governs instead.
  • If others disagree with an attorney, any interested person may apply to the Court, which can terminate the power if that is in the donor's best interests.

You may have been named as an attorney, or you may be a family member who is worried about a parent or spouse. Either way, the same question comes up: when does an enduring power of attorney actually start working, and who gets to say the person can no longer manage?

The answer depends heavily on the wording of the document. This article explains the general rules in Alberta, what happens if people disagree, and what to do if you are unsure where you stand.

This article covers the law of Alberta.

When an enduring power of attorney takes effect

An enduring power of attorney, often called an EPA, can take effect at a future time or on a contingency such as incapacity. In practice, an EPA can start immediately and continue after the person becomes incapable, or it can start only once incapacity occurs.

Because of this, the first step is always to read the document itself. If it says the power starts immediately, it can continue after the donor becomes incapable. If it says the power starts only on incapacity, the trigger described in the document matters.

Who must say the donor has lost capacity

The person who made the EPA is called the donor. If the document does not name anyone to decide whether the trigger has happened, incapacity is established when 2 medical practitioners declare in writing that the contingency has occurred. If the document does name who must make the declaration, the document governs.

Good documents say who makes the written declaration. The Office of the Public Guardian and Trustee (OPGT) cannot assess capacity or provide legal advice.

SituationWho declares incapacity
Document names who decidesThe person or people named in the document
Document names no one2 medical practitioners, in writing
Document being preparedThe document should say who makes the written declaration

What an attorney must do once the donor cannot decide

Once the attorney knows or should know that the donor cannot make reasonable judgments, the attorney must protect the donor's interests, unless the document provides otherwise. How this duty applies in a particular case depends on the facts, so it is worth confirming with a lawyer.

An attorney who wants to step away needs Court permission to renounce while that duty to protect the donor's interests applies. Later incapacity of the donor does not end the EPA.

If family members disagree with the attorney

If others disagree with an attorney, any interested person may apply to the Court to terminate the power if that would be in the donor's best interests. The Court cannot appoint a substitute attorney, but it may direct a trusteeship application and appoint an interim trustee.

The Court may also order an attorney to pass accounts. The donor or the donor's personal representative may apply for this, and so may any interested person if the donor cannot make reasonable judgments.

Complaints about an attorney acting under an EPA do not go to the OPGT, which cannot investigate them. Instead, concerns about an attorney can be taken to the Court through the applications described above.

How an EPA can end, and what to do next

An EPA is void if the donor was mentally incapable of understanding its nature and effect when signing. The donor can revoke it in writing only while mentally capable of understanding the revocation. An EPA also ends when a trusteeship order is granted in respect of the donor or of the attorney.

Frequently asked questions

Does a doctor have to confirm incapacity before my attorney can act?

It depends on the document. An EPA can start immediately or only on incapacity. If it starts on incapacity and names who must declare it, the document governs; if it names no one, 2 medical practitioners must declare in writing.

Can the OPGT decide whether my parent has lost capacity?

No. The OPGT cannot assess capacity or provide legal advice, and it cannot investigate complaints against an attorney acting under an EPA.

What if I think the attorney is not acting properly?

Any interested person may apply to the Court to terminate the power if that would be in the donor's best interests. The Court may also order the attorney to pass accounts.

Can a donor cancel an EPA after becoming forgetful?

The donor can revoke it in writing only while mentally capable of understanding the revocation. Whether that is the case at a given time is a factual question worth raising with a lawyer.

Sources

Links go to official government, court and regulator pages. The law changes — confirm you are reading the current version.

This article is general information, not legal advice. Reading it does not create a lawyer-client relationship. Alberta laws, tax rates, and government programs change, and how the law applies depends on your specific facts. For advice about your situation, speak with a lawyer who practises in Alberta. Reach us at 1-844-900-1070 or send our Team a message.

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