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Can Family Challenge a Power of Attorney After Death in Ontario?

Suspect a parent's attorney misused money? Learn how an Ontario estate can seek an accounting, who needs court permission, and what to do next.

Wills & Estates5 min readTSLBy the Treadstone Law Team · OntarioUpdated October 28, 2026
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Key takeaways
  • An attorney for property owes fiduciary duties, including the core duty to act exclusively for the grantor's benefit.
  • A court can order an attorney's accounts to be passed, but someone outside the listed applicants needs the court's leave.
  • When the attorney is also the estate trustee, beneficiaries have been allowed to seek leave to get an accounting for the period before death.
  • Time matters, because the basic limitation period is two years from the day a claim was discovered.

After a parent dies, family members sometimes look at the bank statements and see things that do not add up: large withdrawals, a house sold, accounts moved into one child's name. If one person held a power of attorney for property, the question becomes whether those transactions were proper.

This article explains in general terms how the law treats an attorney's conduct once the person who granted the power has died, who can ask for an accounting, and what a family can do while the facts are still being sorted out. It is general information, not advice on your situation.

What duties does an attorney for property owe?

A power of attorney for property lets someone manage another person's finances. That person, called the attorney, is not free to treat the money as their own. Under the Substitute Decisions Act an attorney for property owes fiduciary duties, including the core duty to act exclusively for the grantor's benefit.

In one Court of Appeal matter, the motion judge relied on evidence of unexplained ATM withdrawals and personal purchases to terminate a power of attorney and appoint the Public Guardian and Trustee as guardian of property. Those findings were not tested on appeal, so they show what a court has been willing to do on that evidence, not what will happen in your case.

Who can ask the attorney to account after death?

Under section 42(1) of the Substitute Decisions Act, a court may on application order that all or part of an attorney's accounts be passed. A person outside the listed applicants needs the court's leave to apply under section 42(4). At common law, only the grantor or the grantor's estate could call the attorney to account.

Who is askingGeneral position
The grantor's estate (through the estate trustee)The estate could call the attorney to account at common law
A person listed as an applicant in the ActMay apply for an order that accounts be passed
A person outside the listed applicantsNeeds leave of the court

The law on whether third parties can compel an attorney to account is still developing, so the outcome can depend on the facts and who is applying.

What if the attorney is also the estate trustee?

This is a common and awkward situation. The person who managed the money before death is now the one who would normally look into those transactions for the estate. Where the donor has died and the attorney is also the estate trustee, there can be no true accounting between the two roles. Beneficiaries in that position have been allowed to seek leave under section 42(4) to obtain an accounting for the pre-death period.

An estate trustee also has a duty to call in the estate's assets. If money or property left the parent's hands improperly, recovering it may form part of that duty. Where the trustee is the person whose conduct is in question, beneficiaries may need to take steps themselves.

Practical points about timing, proof and cost

How the limitation rules apply to a particular attorney's transactions, and when the clock started, depends on the facts. That question is worth putting to a lawyer early rather than late.

When the person is still alive, or serious harm is feared

Sometimes concerns arise before a death. The Public Guardian and Trustee must investigate allegations that a person is incapable of managing property and that serious harm is occurring or may occur, and can obtain access to relevant records. The Office of the Public Guardian and Trustee helpline is 1-800-366-0335.

What to do next

Frequently asked questions

Can I demand to see what the attorney did with my parent's money?

Not as an automatic right in every case. A court may order that an attorney's accounts be passed, and a person outside the listed applicants needs leave of the court. The estate trustee, acting for the estate, is in a different position than an individual beneficiary.

What if the executor is the same person who held the power of attorney?

There can be no true accounting between the two roles in that situation. Beneficiaries have been allowed to seek leave under section 42(4) to obtain an accounting for the period before death.

Is there a deadline to bring a claim?

The basic limitation period is two years from the day the claim was discovered. When a claim was discovered is a factual question, so get advice promptly.

Will the estate pay for the court case?

Not automatically. Costs come out of the estate only where public policy considerations apply. Courts may also split costs so the loser pays part and the estate bears the balance.

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. Ontario 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 licensed Ontario lawyer. Treadstone Law is licensed by the Law Society of Ontario — reach us at 1-844-900-1070 or start a file online.

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