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Find a Lawyer » Canada Legal Guides » Ontario Legal Guides » Wills & Estate Planning Ontario » Making a Will & Power of Attorney Ontario » Can an Ontario Power of Attorney Sue Someone on Your Behalf?

Can an Ontario Power of Attorney Sue Someone on Your Behalf?

27 Jun 2026 4 min read No comments Making a Will & Power of Attorney Ontario
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Yes, in Ontario, a Continuing Power of Attorney for Property grants your designated attorney the legal authority to hire lawyers and initiate civil lawsuits on your behalf. Filing a Statement of Claim at the Superior Court of Justice currently requires a $243 CAD government fee.

When you appoint someone as your Continuing Power of Attorney for Property in Ontario, you are granting them immense legal authority. Many people assume this document is only used to pay hydro bills, manage banking, or sell real estate if they lose capacity. However, the powers granted under the Substitute Decisions Act extend much further into the realm of complex litigation.

If an aging parent in Mississauga is defrauded by a contractor, or if a spouse in Toronto is incapacitated in a severe car accident, their appointed attorney has the power to step into their shoes. 📝 They can retain a law firm, instruct legal counsel, and launch a civil lawsuit for debt collection or personal injury in the donor’s name. If you are acting as an attorney and need to commence litigation, we strongly recommend hiring a specialized civil litigation lawyer from our directory to ensure you do not breach your fiduciary duties.

Step-by-Step Process for a POA Commencing a Lawsuit

Suing someone on behalf of an incapacitated person is a serious undertaking. The attorney must act strictly in the best financial interests of the donor. Here is the legal process most Ontario litigators follow when taking instructions from a Power of Attorney.

Step 1: Verifying the Scope of the POA Document

Before any lawsuit is filed, the litigation lawyer will meticulously review the original Power of Attorney for Property. 🔍 They must ensure the document is a “Continuing” POA (meaning it remains valid after the donor loses capacity) and that the donor did not write in any specific restrictions preventing the attorney from initiating legal action.

Step 2: Establishing Capacity or the Triggering Event

If the POA requires a triggering event (e.g., “This document is only valid if I am deemed mentally incapable”), the attorney must secure a formal letter from a physician or a certified Ontario capacity assessor. If there is no trigger clause, the attorney can act immediately, though doing so while the donor is fully capable without their permission is a breach of fiduciary duty.

Step 3: Retaining Litigation Counsel

The attorney will sign the legal retainer agreement on behalf of the donor. 👤 It is critical to note that the attorney pays the legal fees using the donor’s funds, not their own personal money. The attorney must keep immaculate records of these legal expenses to show they were necessary to protect the donor’s estate.

Step 4: Filing the Statement of Claim

The lawyer will draft a Statement of Claim and file it with the Ontario Superior Court of Justice. The lawsuit will be filed in the name of the donor (e.g., “John Smith, by his attorney for property, Jane Smith”). The opposing party is then served with the lawsuit and must respond within 20 days.

Step 5: Managing Discoveries and Settlement

As the lawsuit progresses, the attorney will act as the key decision-maker. 💰 They will attend Examinations for Discovery to answer questions on behalf of the donor, and they possess the legal authority to accept or reject out-of-court financial settlements, provided the settlement is in the donor’s best interest.

How Much Does it Cost in Ontario?

Litigation is inherently expensive, and the attorney must be careful not to bankrupt the donor’s estate on a frivolous lawsuit. 💵 Here are the typical costs in CAD as of June 2026.

  • Court Filing Fee: $243 CAD to file a Statement of Claim in the Superior Court of Justice, as set out in O. Reg. 293/92.
  • Process Server Fees: Typically range from $100 to $250 CAD to formally serve the Statement of Claim on the defendants.
  • Law Firm Representation: Civil litigation is complex, with legal fees for initiating a lawsuit and proceeding through discoveries or trials generally ranging from $10,000 to $30,000+ CAD, funded entirely from the donor’s assets.

How Long Does the Process Take?

The timeline for a civil lawsuit in Ontario is highly variable and depends on court backlogs. ⏱ Drafting and filing the initial Statement of Claim usually takes 1 to 2 months. Once filed, navigating the entire civil litigation process-including pleadings, examinations for discovery, mandatory mediation, and reaching a final trial or settlement-typically takes anywhere from 1 to 3 years.

Attorney Power / LimitationIs it Legally Permitted?
Hiring a lawyer using the donor’s fundsYes, to protect the donor’s interests.
Signing settlement agreements on the donor’s behalfYes, if the settlement benefits the donor.
Changing or revoking the donor’s WillNo, strictly prohibited by law.
Using the lawsuit to personally enrich themselvesNo, this is a severe breach of fiduciary duty.

Frequently Asked Questions (FAQ)

Can an attorney be sued personally if they lose the case?

Generally, no. As long as the attorney acted reasonably, in good faith, and within their fiduciary duty, the legal costs and adverse cost awards are paid entirely from the donor’s estate, not the attorney’s personal bank account.

Can the attorney sue for a family law dispute, like a divorce?

Yes, but it is highly complex. An attorney for property can manage the financial equalization aspects of a divorce for an incapacitated spouse, but initiating the divorce itself often requires specialized court permission.

What if the attorney uses the lawsuit to benefit themselves?

This is a severe breach of trust. If family members suspect the attorney is litigating for personal gain, they can report them to the Office of the Public Guardian and Trustee (OPGT) or apply to the court to have the attorney forcibly removed.

Can the attorney sue to change the donor’s Will?

Absolutely not. A Power of Attorney for Property strictly prohibits the attorney from making, changing, or revoking the donor’s Last Will and Testament. Testamentary capacity is strictly personal.

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