Does a Customer Complaint Justify Firing for Cause?

Why It Matters

The ruling tightens the evidentiary threshold for cause dismissals, safeguarding employees from arbitrary terminations based on unsubstantiated complaints, and clarifies mitigation rules that directly affect wrongful‑dismissal damages.

Key Takeaways

• Customer complaints need admissible evidence to justify cause termination
• Employer must prove comparable work was available to reduce damages
• Earnings from any job during notice offset award, regardless of pay
• Court reduced award by $24,300 USD for mitigation
• Brandt Tractor ordered to pay $11,100 USD legal costs

Pulse Analysis

Ontario courts have long required employers to meet a high evidentiary bar when alleging termination for cause. The Williamson v. Brandt Tractor decision underscores that a mere customer complaint, without verifiable testimony or documentation, is insufficient to bypass the statutory notice regime. This reinforces the principle that cause dismissals must be grounded in clear, provable misconduct, prompting HR leaders to tighten investigation protocols and retain concrete evidence before moving to terminate an employee.

The appeal also clarifies the mitigation calculus that courts apply to wrongful‑dismissal awards. Even when an employee accepts a lower‑paying position during the notice period, any earnings must be deducted from the compensation award, as affirmed by the precedent set in Brake v. PJ‑M2R Restaurant. This eliminates the previously ambiguous practice of exempting lower‑salary roles from mitigation, compelling employers to accurately project potential earnings reductions when negotiating settlements.

For businesses, the ruling signals a need for robust documentation and proactive risk management. Companies should develop clear policies for handling customer complaints, ensure thorough internal investigations, and maintain detailed records of employee performance. Additionally, employers must be prepared to demonstrate the availability of comparable work if they wish to argue reduced damages. By aligning termination practices with these legal expectations, organizations can mitigate litigation exposure and uphold fair‑employment standards.