Log in or register
Share on LinkedInShare on LinkedIn

ARTICLE · 01 SEPTEMBER 2026

A Lawyer’s List Is Not A Limitations Lifeline: The ONCA Confirms Plaintiffs Must Exercise Reasonable Diligence

McMillan LLP
McMillan LLP
Contributor
McMillan LLP

McMillan LLP

The firm : McMillan LLP is one of Canada’s leading national law firms with offices in Montreal,...

View firm profile
Explore more from McMillan LLP

The Ontario Court of Appeal's decision in Wiebe v. Johnson & Johnson Inc. clarifies when the two-year limitation period begins under Ontario's Limitations Act, 2002, emphasizing that plaintiffs cannot delay the clock by failing to investigate potential claims when they knew or should have known the material facts. The Court ruled that a law firm's opinion about product defects does not constitute a new material fact that resets the limitation period.

CanadaLitigation, Mediation & Arbitration
Lindsay Lorimer
Lindsay Lorimer
Sezen Izer
Sezen Izer
Author LinkedIn connections

The Ontario Court of Appeal’s (“ONCA”) decision in Wiebe v. Johnson & Johnson Inc.1 (“Wiebe”) provides important guidance on when the two-year limitation period begins running under Ontario’s Limitations Act, 2002.2

The Court confirmed that a plaintiff cannot postpone the running of the limitation period by failing to investigate a potential claim where the plaintiff knew, or through reasonable diligence ought to have known, the material facts underlying the claim. Subsequent legal advice that a viable claim exists does not constitute a new material fact that delays discoverability.

In this case, the Court held that a law firm’s advertisement or opinion that a product is defective and that litigation has merit does not constitute a “material fact” capable of restarting the clock.

We operate a free-to-view policy, asking only that you register in order to read all of our content. Please login or register to view the rest of this article.

Register for freeORLog in

The foregoing provides only an overview and does not constitute legal advice. Readers are cautioned against making any decisions based on this material alone. Rather, specific legal advice should be obtained.

© McMillan LLP 2025

The content of this article is intended to provide a general guide to the subject matter. Specialist advice should be sought about your specific circumstances.

View source

Related Articles

Legal Intelligence Newsletters: sign up for the latest legal and regulatory news on your chosen topics

Read more about

Related Comparative Guides

See more popular content from

Article

BLG At The SCC – What’s Coming In The Supreme Court’s Fall 2026 Sitting Schedule

The Supreme Court of Canada held its second annual ceremony marking the opening of the judicial year at its temporary home in the West Memorial Building, with Chief Justice highlighting the Court's increased caseload and architectural features. What significant constitutional and legal challenges will the Court address in its fall 2026 session, including cases on firearm regulations, Crown immunity, and vicarious liability?
CanadaLitigation, Mediation & Arbitration
Borden Ladner Gervais LLP
Borden Ladner Gervais LLP
Article

Ontario Court Bifurcates Class Action As Practical Approach To Onerous Discovery Demands

An Ontario court granted a motion to bifurcate liability and damages stages in a class action alleging $500 million in hidden fees, finding that extensive documentary production requests were disproportionate and not relevant to determining liability. The decision addresses proportionality concerns in class actions where defendants face onerous discovery demands spanning millions of transactions over a decade.
CanadaLitigation, Mediation & Arbitration
Bennett Jones LLP
Bennett Jones LLP
Article

The Supreme Court Of Canada Reviews Québec’s Bill 21

Québec's Bill 21, enacted in 2019, bans public sector workers from wearing religious symbols and is shielded from most Charter challenges by the notwithstanding clause. The Supreme Court of Canada is now reviewing this controversial law, with a ruling expected as early as November 2026 or later in 2027. Former Minister of Justice Arif Virani discusses the court's struggle to balance competing constitutional principles in this landmark case.
CanadaLitigation, Mediation & Arbitration
Torys
Torys
Article

The Coldcard Exploit: Why Victims May Have Two Routes To Recovery

A five-year-old firmware defect in Coldcard hardware wallets has enabled attackers to systematically drain an estimated $116 million in Bitcoin from over 5,200 victims since July 2026. This unprecedented exploit raises critical questions about manufacturer liability and creates two distinct legal pathways for recovery: blockchain tracing against the perpetrators and potential litigation against Canadian manufacturer Coinkite for product defects that undermined the fundamental security promise of devices mar
CanadaLitigation, Mediation & Arbitration
WeirFoulds LLP
WeirFoulds LLP
Article

Supreme Court Strikes Down Privative Clause: What Democracy Watch v Canada Means For Administrative Decision-makers

The Supreme Court of Canada has unanimously struck down a privative clause in the Conflict of Interest Act that attempted to bar judicial review of the Ethics Commissioner's decisions. The ruling establishes that the Constitution guarantees a minimum of legality review over all administrative decisions, with implications extending to labour relations, workers' compensation, and immigration legislation containing similar clauses.
CanadaLitigation, Mediation & Arbitration
Miller Thomson
Miller Thomson
Article

Powering Up: Grid Access, Strategic Screening And Canada’s Emerging Data Centre Regimes

Canada is rapidly becoming a key destination for data centre investment, fueled by artificial intelligence and cloud computing growth. However, this expansion places unprecedented demands on electricity grids, water resources, and local communities. As federal and provincial governments introduce new frameworks to manage these resource challenges, developers and investors must navigate an increasingly complex landscape where power strategy...
CanadaEnergy and Natural Resources
McMillan LLP
McMillan LLP
Article

Cleared For Investment: Canada Opens The Door To Private Capital At Its Largest Airports

Prime Minister Mark Carney has announced plans to seek private investment through long-term concessions to operate Canada's four largest airports: Toronto Pearson, Vancouver, Montréal-Trudeau and Calgary. While the government would retain ownership of underlying land and assets, this represents a fundamental shift from the current not-for-profit airport authority model that has governed these facilities since the 1990s.
CanadaTransport
McMillan LLP
McMillan LLP
Article

Building Momentum: Canada Advances Major Projects Under The Building Canada Act

The federal government has published notices proposing to add the Mackenzie Valley Highway and Roberts Bank Terminal 2 to Schedule 1 of the Building Canada Act as projects of national interest. These potential listings, following a similar notice for the West Coast Oil Pipeline, provide the first practical indications of how the government may use the Act to advance major infrastructure projects through streamlined federal approvals while maintaining Indigenous consultation and environmental assessment requ
CanadaGovernment, Public Sector
McMillan LLP
McMillan LLP