Ontario Court Appeal Poirier Settlement: Upheld Despite Breach Claim

• The Ontario Court of Appeal dismissed an appeal to add a defendant to an injury lawsuit, upholding a prior settlement agreement.
• Appellants had agreed not to name Mr. Villeneuve as a defendant in exchange for his affidavits and cooperation as a witness.
• Despite claims that Mr. Villeneuve's affidavits contained "demonstrably false" statements, the Superior Court found the settlement valid and enforceable.
• The Court of Appeal found no error in the lower court's decision, noting the appellants failed to prove Mr. Villeneuve breached the agreement.
• Appellants were ordered to pay Mr. Villeneuve $12,000 in partial indemnity costs.

This ruling from the Ontario Court of Appeal underscores the robust enforceability of settlement agreements, particularly those that explicitly prevent the addition of new defendants, even when subsequent evidence appears to contradict earlier statements.

The Ontario Court of Appeal recently addressed a contentious motion stemming from a physical altercation that occurred outside a bar, leading to alleged injuries for two appellants. The initial legal action targeted the establishment, its employees, and other individuals believed to be involved in the late-night incident, which was partially captured in a brief Snapchat video. As the proceedings advanced, the appellants sought to introduce an additional party, Mr. Villeneuve, whom they identified as a potential participant, into the lawsuit.

However, prior to this attempt, the appellants and Mr. Villeneuve had entered into a settlement agreement, facilitated through an exchange of emails between their respective legal counsels. This agreement stipulated that Mr. Villeneuve would provide an affidavit detailing his recollections of the evening and would cooperate as a witness if required for trial. In return, the appellants explicitly committed not to name him as a defendant in their ongoing injury claim. Mr. Villeneuve subsequently submitted two affidavits, in which he discussed his and a friend's alcohol consumption, identified individuals present in the video, and asserted that he did not physically strike the appellants.

Despite the existing settlement, the appellants' counsel contended that Mr. Villeneuve's affidavit evidence contained inconsistencies and statements that were

The appellants subsequently brought the matter before the Ontario Court of Appeal, acknowledging the existence of a valid and binding settlement agreement. Their argument hinged on the assertion that Mr. Villeneuve's allegedly untruthful affidavits constituted a breach of that agreement, thereby nullifying their commitment not to add him as a defendant. In the case of Poirier v. 2621892 Ontario Inc., 2026 ONCA 788, the appellate court ultimately dismissed the appeal, upholding the motion judge's original decision.

While the Ontario Court of Appeal recognized that the submission of a "demonstrably false" affidavit could, in principle, constitute a breach of a settlement agreement—even one containing a clause precluding the addition of a defendant "no matter what his evidence"—it deferred to the motion judge's interpretation of the specific agreement and his finding that the appellants had reneged on their commitment by attempting to add Mr. Villeneuve. The court found no palpable and overriding error or extricable legal error in the lower court's reasoning. Furthermore, the appellants failed to satisfy their burden of proof in establishing that Mr. Villeneuve had, in fact, breached the adding defendant settlement agreement. Consequently, the appellants were ordered to pay Mr. Villeneuve partial indemnity costs totaling $12,000.

This ruling from the Ontario Court of Appeal underscores the robust enforceability of settlement agreements, particularly those that explicitly prevent the addition of new defendants, even when subsequent evidence appears to contradict earlier statements. The decision highlights the high evidentiary threshold required to successfully challenge such agreements, emphasizing that courts will generally uphold them unless a clear and overriding error or a demonstrable breach is proven.

For legal practitioners, the case serves as a critical reminder of the importance of advising clients on the binding nature of settlement terms. The court's deference to the motion judge's interpretation and its finding that the appellants failed to meet their burden regarding the alleged breach of settlement agreement affidavit reinforce that parties must carefully consider the finality of such arrangements. The outcome solidifies the principle that once a settlement is reached, the bar for unraveling it, especially concerning the inclusion of parties, is exceptionally high.

Lawyers must advise clients on the robust enforceability of settlement agreements, particularly those precluding the addition of defendants, as courts will uphold them unless a clear and overriding error or breach is demonstrated. This case highlights the high evidentiary bar for challenging such agreements, even when subsequent evidence appears contradictory or 'demonstrably false'.

Source: Original reporting via The Lawyer's Daily