Executive Summary: Key Legal and Evidentiary Issues

• Dispute over whether a proposed amendment introduced a new cause of action for breach of the duty of good faith and honest performance.

• Consideration of whether the limitation period under the Limitations Act, 2002 had expired before the amendment motion was brought.

• Evaluation of whether the plaintiff provided sufficient evidence to rebut the statutory presumption of discoverability.

• Determination of whether the new allegations of dishonesty and punitive damages constituted new material facts.

• Review of the standard for granting leave to amend under Rule 26.01 of Ontario’s Rules of Civil Procedure.

• Examination of whether the associate judge made any legal or palpable and overriding factual errors.

Facts and procedural background

In RatesDotCa Group Ltd. v. Trader Corporation, the dispute stemmed from a “Traffic Generation Agreement” between the parties, which allowed users from the defendant’s website (Autotrader.ca) to be redirected to the plaintiff’s insurance comparison site (rates.ca). The contract commenced in March 2019 and was intended to run until March 2021. The plaintiff alleged that the defendant, Trader Corporation, breached the agreement by removing the linking tool in February 2020, prior to the contract’s expiration.

In January 2020, Trader claimed it was terminating the agreement due to material breaches by the plaintiff. However, years later in October 2024, the plaintiff sought to further amend its statement of claim to allege that Trader had acted in bad faith and dishonestly, including soliciting third-party insurers to replace the tool early in the agreement’s term, and misrepresenting its reasons for terminating the agreement.

The motion to amend and the lower court's ruling

The proposed amendments included a claim for $200,000 in punitive damages and introduced specific allegations under the heading “Breach of the Duty of Honest Performance.” Trader refused consent, arguing that these changes introduced a new cause of action and were barred by the two-year limitation period. The plaintiff moved for leave to amend under Rule 26.01.

Associate Justice La Horey denied the motion, finding that the proposed amendments raised a new cause of action and sought a new remedy based on previously unpleaded material facts. She concluded that the amendments went beyond recharacterizing existing claims and introduced fresh factual allegations of dishonest conduct and misrepresentation, which were never included in the original claim.

Limitation period and discoverability analysis

The associate judge held that the proposed new claim was statute-barred under the Limitations Act, 2002. She emphasized that under section 5(2), a plaintiff is presumed to have known of the claim on the date the act or omission occurred, unless proven otherwise. The plaintiff provided no affidavit evidence establishing when it discovered the new facts, nor any basis to rebut the presumption.

While the plaintiff argued that it could not have known about Trader’s dishonest motives until post-discovery, the judge found no admissible or direct evidence on this point. A vague reference to internal email evidence produced during discovery did not satisfy the evidentiary burden. The plaintiff also failed to plead or raise the doctrine of fraudulent concealment in a timely manner.

Appeal and decision of the Ontario Superior Court

On appeal, Justice Centa dismissed the appeal. He upheld the associate judge’s findings on both legal and factual grounds. He confirmed that a new cause of action had been introduced and that the plaintiff failed to provide evidence supporting a claim that the limitation period had not expired. The court reaffirmed that pleading a duty of honest performance requires material facts to support it—not just new labels or legal theories applied to existing facts.

The court also found no merit in the plaintiff’s argument that the pleadings were merely providing further particulars or clarification of an existing breach of contract. It emphasized that new allegations of dishonest conduct and a request for punitive damages required distinct and timely pleading.

Conclusion and costs

The appeal was dismissed in full. The Ontario Superior Court awarded $25,000 in costs to Trader Corporation. The case serves as a strong reminder of the procedural and evidentiary standards governing motions to amend pleadings, particularly when limitation periods are at play. Parties seeking to introduce new causes of action must ensure they do so within the statutory timeframe and support such motions with concrete evidence of discoverability.