How to Revoke a Power of Attorney in Canada

A 62-year-old in Hamilton named her younger brother as her continuing attorney for property in 2019. Five years later, after a falling-out, she signed a brand-new power of attorney naming her daughter and slid the old document into a drawer. She did not write to the bank. Three weeks later her brother used his still-current copy to transfer roughly $40,000 from her chequing account into a joint account in his own name. The bank was off the hook because she had never given it notice that the old document was revoked.

That scenario captures the single most important thing about revoking a power of attorney in Canada: the act of revocation is mechanical, but the act that actually protects you is notifying every third party who held a copy. This guide walks the steps, the province-by-province witnessing rules, and the things that quietly trip people up.

If you are still planning your estate rather than unwinding part of it, see our pillar on estate planning in Canada and the companion piece on power of attorney for property.

What "revoking" actually means #

A power of attorney is a unilateral grant of authority. You as the grantor named someone — the attorney, in legal usage — to act on your behalf, either for property and finances or for personal and health care. Revocation is the reverse motion: you are pulling that authority back. The legal effect, once revocation is properly given, is that the former attorney can no longer bind you, and any institution dealing with them after receiving notice cannot rely on the prior document.

The complication is timing. Across the common-law provinces, the dominant rule is that revocation takes effect when the relevant third party has actual notice of it.^[1] Until that notice arrives, the third party can generally still rely on the old document in good faith. That gap — between you signing a revocation in your kitchen and the bank's records actually being updated — is where most of the real harm happens.

When you can revoke #

The bar is straightforward in most provinces: you must have the same capacity that would be required to grant a power of attorney in the first place. Ontario's Substitute Decisions Act, 1992 says it directly — a grantor is capable of revoking a continuing power of attorney for property if they are capable of giving one, and the same applies, with its own slightly different test, for a power of attorney for personal care.^[1]

That cuts both ways. As long as you are capable, you can revoke on a whim — no reason needed, no court application, no permission from the attorney. The attorney's status is at your discretion. If, on the other hand, capacity has been lost, the grantor cannot validly revoke; family who are concerned about an attorney's conduct generally have to take a different path, which we cover further down.

A small but real complication in Ontario is that the Substitute Decisions Act contemplates a formal capacity-to-revoke assessment for some personal-care POAs that contain "special provisions" — the assessor uses prescribed Form E.^[5] Most ordinary revocations do not require this. It typically comes up only when the original POA itself triggered the higher capacity-assessment regime.

Province-by-province formalities #

Witnessing rules track the rules for granting a power of attorney in the same province, because the underlying logic is that you should not be able to undo a witnessed document with an unwitnessed scrap. The current picture across the common-law provinces and territories generally looks like this.

Ontario. A revocation of a continuing power of attorney for property is required to be in writing, signed by the grantor, and witnessed by two people who meet the same statutory criteria as the witnesses to the original — neither witness can be the attorney or the attorney's spouse, the grantor's spouse or partner, a child of the grantor, or anyone under 18.^[1]

British Columbia. Under the Power of Attorney Act, the adult revokes an enduring power of attorney by giving written notice to each attorney.^[2] Best practice is to have the revocation signed in the presence of the same witnessing configuration used for the original — either two witnesses, or one witness if that witness is a BC lawyer or notary.

Alberta. The Powers of Attorney Act governs enduring POAs; revocation is required to be in writing, and notice to the attorney is required for the revocation to take effect against that attorney.^[3]

Saskatchewan. The Powers of Attorney Act, 2002 requires written revocation and witnessing parallel to the requirements for granting an enduring power of attorney.^[4]

Manitoba, New Brunswick, Nova Scotia, PEI, Newfoundland and Labrador. Each common-law province has its own statute with broadly similar architecture: written instrument, witnessing parallel to the grant, notice to the attorney, notice to third parties. The differences are in the witness-eligibility rules and in whether a non-enduring (ordinary) POA terminates automatically on incapacity.

Territories (YT, NT, NU). Each territory has its own enduring or springing POA statute, with witnessing rules and revocation requirements that mirror the provincial pattern.

The practical takeaway is that you do not need to memorise your province's witnessing list — you only need to use the same witnessing configuration as your original document, plus a written revocation. If your province required two witnesses for the grant, use two witnesses for the revocation.

The six-step revocation, in order #

The mechanics are the same across the common-law provinces, even if the witnessing details vary.

1. Locate and list every copy. Pull out your file. Identify the original POA, the certified copy you gave the bank, the copy your lawyer keeps, the copy your attorney holds, and any institution-specific POA you may also have signed (some banks have their own internal POA form they file separately).
2. Draft a written revocation. It should identify you by full legal name, identify the document being revoked by date and type ("the Continuing Power of Attorney for Property I signed on 12 March 2019"), state clearly that you revoke it effective immediately, and be dated.
3. Sign in front of the right witnesses. Use the same number and type of witnesses your province requires for granting a new POA. In Ontario this is two witnesses who meet the section-10 disqualification rules; in BC it is one BC lawyer or notary, or two ordinary witnesses; in Alberta it is at least one witness, generally with similar disqualifications.
4. Serve the former attorney. Deliver a signed and dated copy directly. Many provinces require this as a statutory step for the revocation to take effect against the attorney.^[2] Use a method that gives you proof — registered mail, courier, or in-person delivery with a witnessed acknowledgement.
5. Notify every third party who holds a copy. Banks, brokerages, the registry of land titles if the POA was registered, your lawyer, your accountant, and any institution where the attorney has dealt under your name. Send a copy of the revocation with a brief cover note saying their file should be updated. Get an acknowledgement in writing.
6. Sign a new POA, or document that you are leaving the role vacant. A revocation that leaves no replacement is legitimate, but it generally also leaves your family without anyone authorised to step in if capacity is lost. Most people pair the revocation with a fresh document naming someone else. See our guide on how to choose a power of attorney for property before naming a replacement.

What "notice" looks like in practice #

Notice is the load-bearing concept and it gets surprisingly little attention in plain-language guides. A few practical tactics that work across provinces.

Notice should be in writing, not verbal. A phone call to the bank may register at the branch but rarely propagates to the institution's central POA registry. Most banks have a specific department for POA filings and require a written revocation on file.

Notice should be delivered with proof of delivery. Registered mail to the former attorney and to head-office bank departments is the cleanest paper trail. For in-person delivery, get the recipient to sign and date an acknowledgement.

Notice should include enough detail for the recipient to actually identify and update their file. The recipient bank generally needs the date of the original POA, the date of revocation, your account numbers, and your full legal name. A revocation that just says "I revoke any POA in your file" is harder for the bank to action than one that identifies the document precisely.

Notice can be given to multiple institutions at once. There is no requirement that you only revoke against one bank at a time. Send the same revocation copy to every institution where the attorney might attempt to act.

What happens to past transactions #

Revocation operates prospectively. A properly revoked power of attorney does not undo what the attorney already did under the old document. If the attorney made gifts, paid bills, opened accounts, or signed contracts before the revocation took effect, those acts are generally binding on the grantor's estate.

The remedies for past misconduct are separate from the revocation itself. They include a fiduciary-duty claim against the former attorney, a request for an accounting, a complaint to the Public Guardian and Trustee in provinces that accept such complaints (Ontario, BC, Alberta), and in serious cases a civil or criminal proceeding for misappropriation. None of those depend on the POA having been revoked first, although revocation removes the attorney's ability to make matters worse.

When the grantor has lost capacity #

The most painful version of this question — and the one we get asked most — is what to do when you suspect a current attorney is abusing the role but the grantor can no longer validly sign a revocation.

The grantor cannot revoke without capacity. That is the rule, and it does not bend.^[1] What can happen instead is one of the following.

A concerned family member can apply to court for an order removing the attorney and replacing them with a court-appointed guardian or committee. The applicable statute varies — in Ontario it is the Substitute Decisions Act, in BC the Patients Property Act combined with the Power of Attorney Act, in Alberta the Adult Guardianship and Trusteeship Act.

In Ontario, BC, and Alberta, complaints can also be made to the Public Guardian and Trustee, which has jurisdiction to investigate financial abuse of an incapable person and, in appropriate cases, to take over administration on an interim basis.

In all provinces, a request for an accounting can be made — formally, in court — which forces the attorney to produce records of every transaction. This is often the first step before a full removal application, because the accounting itself frequently reveals the conduct that justifies removal.

These are slower and more expensive than revocation, which is exactly why revoking while capacity is intact is so much better than waiting until concerns emerge.

What this means for your plan #

Three practical takeaways. First, the only revocation that fully protects you is the one that has been delivered to every third party who could rely on the old document — the signing ceremony is the easy half. Second, treat your POA for property and your POA for personal care as separate documents with separate revocations; do not assume one revocation reaches both. Third, pair every revocation with either a fresh, current POA naming someone you trust or a documented decision to leave the role unfilled. Leaving the seat empty by accident is one of the more common ways a plan unravels later.

When clients build their estate plan with It's Simple Will, the workflow prompts a review of any prior POA on file and produces a current, witnessed continuing or enduring POA matching the user's province. For background, our pillar on estate planning in Canada walks through how the POA fits alongside the will and the Life Discovery Kit.