Organizations handling workplace complaints often focus on getting to the right answer. That is understandable. The outcome matters. But in workplace investigations, how you get to the answer matters as much as what the answer is. A finding that is substantively correct but procedurally compromised is a finding that can be challenged, overturned, and used as evidence of organizational bad faith.
Procedural fairness is the standard. Understanding what it requires is not optional for anyone conducting or overseeing workplace investigations.
What procedural fairness actually requires
Procedural fairness in workplace investigations has several core components, each of which creates corresponding obligations for the investigator and the organization.
Notice. All parties to an investigation need to be told clearly what they are being investigated for. A respondent who is not told the specific allegations cannot respond to them meaningfully. Investigators who keep the allegations vague to avoid "contaminating" the respondent's response are creating a procedural problem, not preventing one.
Opportunity to respond. Every party needs a genuine opportunity to respond to the allegations and evidence against them. This includes the opportunity to know what other witnesses have said where that evidence is being relied upon in findings, to provide their own witnesses, and to respond to documents or records being considered. Procedural fairness is not satisfied by a perfunctory interview that does not actually engage with the evidence.
The Federal Court has been consistent on this point. In Marentette v. Canada (Attorney General) [2024 FC 676] and Qi v. Canada (Attorney General) [2025 FC 1783], the Court found that failing to give a party an opportunity to respond to contradictory evidence that the investigator intended to rely upon was a breach of procedural fairness sufficient to order a reinvestigation. The requirement is not just that parties be interviewed. It is that they have a genuine opportunity to respond to the specific evidence being used against them before findings are made.
An impartial decision-maker. The investigator must have no prior relationship with the parties that would create bias or the reasonable apprehension of bias. Bias does not need to be actual to be a problem. If a reasonable observer would conclude that the investigator could not be impartial, the process is compromised regardless of whether the investigator believes themselves to be neutral.
A decision based on evidence. Findings need to be grounded in evidence, not impression. The report needs to explain what evidence was considered, how credibility was assessed, and why the investigator reached the conclusions they did. A finding that says "the complainant was found credible and the respondent was not" without explaining why is not procedurally defensible.
Where procedural fairness most commonly breaks down
The most common procedural failures in workplace investigations are not dramatic. They are quiet process gaps that become significant when the file is reviewed by someone outside the organization.
Investigators who do not tell the respondent what specifically they are alleged to have done. Organizations that reach conclusions before the investigation is complete because the complainant is believed and the respondent is not liked. Reports that record findings without documenting the reasoning behind credibility assessments. Investigations where one party receives more time, more questions, or more opportunity to respond than the other. Files that are missing documentation of key steps because no one thought to record them at the time.
On credibility specifically: the applicable standard in workplace investigations draws from Faryna v. Chorny [1952 BCCA], where the Court held that credibility is not assessed primarily on demeanor but on whether the witness's account is in harmony with the preponderance of probabilities that a practical person would recognize given the surrounding circumstances. A credibility finding that rests on how someone presented in an interview, rather than on the consistency, plausibility, and corroboration of their account, does not meet this standard and will not hold up.
The Association of Workplace Investigators (AWI) Guiding Principles articulate the professional standard for impartial investigations and reasoned findings. They are widely recognized as the benchmark for what a credible workplace investigation process looks like. Reports that cannot be measured against those principles are in a structurally weaker position when challenged.
Each of these failures is avoidable. Each of them becomes expensive when a lawyer is reviewing the file.
Where fairness ends: the deliberative stage
Procedural fairness obligations apply strictly during the evidentiary phase of an investigation. They do not extend infinitely. Once an investigator has gathered all relevant evidence and given parties a meaningful opportunity to respond, they are entitled to reach their conclusions without further input.
In Carreau v. Canada (Attorney General) [2025 FC 823], the Federal Court clarified that procedural fairness does not require an investigator to reopen the process or allow parties to comment on the investigator's draft findings or final conclusions once the deliberative stage has been reached. Parties are not entitled to a preview of the report before it is issued. The obligation is to ensure a fair evidentiary process, not to provide advance notice of the outcome.
This distinction matters practically. Organizations sometimes feel pressure to share draft findings or give parties a chance to "respond to the report." That pressure is usually coming from parties seeking another opportunity to influence the outcome, not from any procedural requirement. Understanding where the fairness obligation ends is as important as understanding where it begins.
Why it matters beyond legal risk
The legal case for procedural fairness is clear. A procedurally compromised investigation is vulnerable to challenge through grievance arbitration, human rights proceedings, and civil litigation. Organizations that cut corners on process often end up defending not just the underlying complaint but the investigation itself.
But procedural fairness matters beyond legal risk. Employees who go through an investigation process, as complainants or respondents, are watching how the organization handles it. A process that appears designed to reach a particular conclusion, that does not give the respondent a genuine opportunity to respond, or that reaches findings inconsistent with the evidence destroys trust in the organization's commitment to fair treatment. That erosion is difficult to recover from.
A procedurally fair investigation does not guarantee that everyone will be satisfied with the outcome. No investigation process can do that. It does provide a defensible basis for the outcome and a process that demonstrates institutional integrity. In the context of workplace complaints, that is the best any organization can do, and it is what the situation requires.