In a unanimous ruling, ONCA has overturned its prior decision in Handley Estate v. DTE Industries Ltd. (“Handley”) and reshaped the law governing the disclosure of partial settlement agreements in multiparty litigation.

Under Handley, which was decided in 2018, parties entering into a partial settlement agreement that altered the “litigation landscape” were required to disclose the agreement immediately to the nonsettling parties and the Court. Failure to do so constituted an abuse of process for which the only available remedy was an automatic stay of proceedings regardless of prejudice, intent, or the surrounding circumstances.

ONCA has now expressly overruled that framework. Writing for the Court, Chief Justice Tulloch and the panel concluded that Handley was “wrongly decided” because it departed from the foundational principles underlying abuse of process doctrine. In particular, ONCA criticized the prior regime for mandating both a finding of abuse and the “most severe remedy” a stay without regard to fairness, prejudice, proportionality, or the integrity of the administration of justice in the specific case.

The decision emphasized that abuse of process has always been a flexible and discretionary doctrine requiring a contextual analysis. By imposing an “automatic and exceptionless” rule, Handley transformed what should have been a nuanced judicial inquiry into a rigid procedural trap.

The decision repeatedly returned to proportionality as the central organizing principle. In a passage likely to become widely cited, ONCA stated that “the time has come to exchange the Handley axe for a more precise scalpel.”

Alignment with New Rule 49.14

A significant aspect of the decision is its interaction with newly enacted Rule 49.14 of the Rules of Civil Procedure, which came into force in June 2025. Importantly, ONCA held that Rule 49.14 reflects the approach the common law should always have taken: contextual, flexible, and proportionate.

The decision also clarified several areas that had generated uncertainty under Handley. Unlike the prior regime which turned on whether an agreement “entirely changed the litigation landscape”. Rule 49.14 applies broadly to all partial settlement agreements.

Implications for Litigants Both Within and Outside of Ontario

The decision materially alters litigation risk analysis in Ontario.

First, Courts will now assess whether the nondisclosure actually resulted in unfairness, prejudice, oppression, or harm to the administration of justice. Second, the decision should reduce the volume of procedural satellite litigation that developed under Handley. ONCA expressly acknowledged that the former rule had become a “trap for the unwary” and incentivized tactical motion practice aimed at exploiting technical noncompliance. Third, the ruling restores meaningful judicial discretion. Trial and motion judges now retain the ability to tailor remedies proportionately to the circumstances rather than imposing an automatic stay in every case. Fourth, the decision clarified appellate routes in this area. Orders granting stays remain final orders appealable to the Court of Appeal, while most other remedial orders including refusals to grant stays will generally be interlocutory and appealable to the Divisional Court with leave.

Beyond the immediate context of partial settlement agreements, the decision reflects a broader judicial movement away from categorical procedural rules that produce disproportionate outcomes disconnected from actual prejudice.

This decision is also likely to resonate outside Ontario. The ONCA panel expressly noted that courts in other provinces had begun relying on Handley, and stated that correcting the error now would prevent the doctrine from becoming entrenched nationally.

With this decision, ONCA has restored coherence between settlement disclosure jurisprudence and the broader law of abuse of process. This decision reaffirms that procedural fairness in civil litigation is best protected not through rigid automatic sanctions, but through principled judicial discretion exercised proportionately and contextually.