Workplace investigations in Ontario are deceptively complex. They look straightforward — complaint, questions, conclusions. But the legal framework is nuanced, procedural requirements are strict, and conducting an investigation improperly exposes your organization to substantial liability.
Most organizations handle their first investigation wrong. They skip steps, interview in the wrong sequence, fail to document, or reach conclusions without sufficient evidence. What started as a complaint becomes a $200K+ legal dispute.
The Legal Framework
Ontario's regulatory framework creates a web of employer duties enforced rigorously. The Ontario Human Rights Code prohibits discrimination and harassment on protected grounds. The Occupational Health and Safety Act requires every reasonable precaution to protect workers — including from violence, bullying, and harassment. Beyond statute, common law duty of care requires you to investigate serious complaints fairly. Failure to investigate is itself actionable.
A company can face liability not just for the original harassment, but for the inadequate investigation that followed.
When You Must Investigate
The trigger isn't discretionary. You must investigate when an employee makes any complaint about harassment or discrimination (even informal), when management becomes aware of potential policy violations through any channel, when there are workplace violence or safety concerns, or when allegations of serious misconduct arise.
You don't get to decide which complaints are "serious enough." If an employee reasonably believes they've been harassed, you have a duty to investigate. Failing to do so is actionable — an employee can sue for both the original harassment and your failure to investigate.
Core Principles
Impartiality. The investigator cannot have a conflict of interest. If the complaint involves someone you report to, you cannot investigate. Most organizations benefit from external investigators precisely because internal people have relationships that bias the process. An external investigator costs $5-15K. An inadequate internal investigation costs $200K+.
Confidentiality. Keep complainant identity confidential to the extent possible, but you must disclose allegations to the respondent. Handle this by disclosing in general terms when possible. Maintain information boundaries throughout — findings aren't for team meetings.
Promptness. Start within 5-10 business days. Delays signal you don't take the matter seriously and allow evidence destruction and story alignment.
Thoroughness. Interview the complainant, respondent, and all identified witnesses. Review documents (emails, messages, attendance records, prior complaints). Analyze credibility against corroborating evidence. A quick investigation that skips witness interviews is a liability waiting to happen.
Fairness to the respondent. Even if allegations seem obvious, the respondent has the right to know what they're accused of, respond, and have their account considered.
The Six-Step Process
Step 1 — Initial Assessment (Days 1-2): Document the complaint in writing. Assess severity and urgency. Implement interim measures if needed (separate work areas, reassign reporting). Decide whether to engage an external investigator. Communicate timeline to complainant.
Step 2 — Planning (Days 2-4): Identify witnesses and documents to review. Determine interview sequence (complainant → respondent → witnesses). Set timeline (interviews within 10 business days; report by day 20-25).
Step 3 — Evidence Gathering: Interview complainant (dates, times, exact words, witnesses, impact). Interview respondent (provide written notice of allegations; allow representation). Interview witnesses separately with open-ended questions. Review emails, messages, records for patterns.
Step 4 — Analysis: Assess credibility based on corroborating evidence. Determine findings: substantiated, partially substantiated, or unsubstantiated. Document reasoning for each finding — this is your defense if challenged.
Step 5 — Report: Prepare detailed findings with reasoning and recommendations. Share with relevant leadership. Recommend corrective actions and preventive measures.
Step 6 — Implementation: Communicate outcomes to complainant and respondent (separate meetings). Implement actions promptly. Monitor for retaliation. Document everything.
The Mistakes That Create Liability
Investigator bias. The single most common failure. An investigator with a relationship to the respondent creates a credibility catastrophe. Courts have awarded damages not just for harassment, but specifically for biased investigations.
Slow response. Months between complaint and start signals you don't take it seriously. Stick to 5-10 business days to start, 20-25 to complete.
Poor documentation. Many investigations are conducted but never properly documented. You can't defend conclusions you didn't record. Maintain detailed interview notes, documents reviewed, findings with reasoning, and actions taken.
Finding substantiation but taking no action. If allegations are substantiated and you do nothing, you create ongoing liability. Implement corrective actions promptly and consistently with your policies.
Retaliation. Illegal under the Human Rights Code and Employment Standards Act. Includes termination, demotion, shift changes, or any adverse action because someone complained. Many companies don't intentionally retaliate — but transferring a complainant to a new team where the new manager treats them poorly is still retaliation.
When to Go External
Engage an external investigator when the allegation involves senior management, when all internal options have conflicts, when the organization lacks investigation experience, when the matter is complex or potentially criminal, when the complainant requests it, or when there's any chance it becomes litigation. The cost ($5-25K) is trivial compared to an inadequate internal investigation ($200-500K+ in litigation and settlements).
The Bottom Line
The investigation itself is either your strongest legal defense or your greatest liability. Organizations that approach investigations as a core capability — treating them with the seriousness they deserve — build trust, improve retention, reduce litigation, and create healthier workplaces. If you're facing uncertainty about your process, consulting employment law counsel before you begin is the best investment you can make.