The obligation to investigate workplace harassment and violence is not merely a matter of good management practice or organizational policy preference. Across Canadian jurisdictions, employers face statutory mandates that require investigation when certain complaints arise or when circumstances suggest that harassment or violence has occurred. These legal requirements exist within occupational health and safety legislation, human rights frameworks, and in some cases labour standards statutes, creating a layered system of employer accountability that applies differently depending on whether a workplace falls under federal or provincial jurisdiction. Understanding where these obligations originate, what they require, and when they are triggered is essential knowledge for any professional responsible for managing people or overseeing human resources functions in a Canadian organization.
The legal foundation for mandatory workplace investigations rests on the recognition that harassment and violence represent workplace hazards that employers have a duty to control. Just as employers must address physical hazards like unsafe machinery or chemical exposure, they must address psychosocial hazards that threaten worker wellbeing. This conceptual shift, which has strengthened considerably over the past two decades, places harassment and violence squarely within the occupational health and safety framework rather than treating them as purely interpersonal matters or grievances to be resolved informally. The consequence of this placement is significant: the same general duty provisions that require employers to take every reasonable precaution to protect worker health and safety extend to protection from harassment and violence, and specific regulatory provisions in most jurisdictions now articulate investigation requirements with varying degrees of detail.