This paper examines fairness perceptions associated with non-union complaint systems. Collaborating with seven CAHRS sponsors, we analyzed data collected from 450 non-union,non-management employees. We find that non-union complaint systems that are regarded as credible, accessible and safe (i.e., no retaliation) influence perceptions of fairness which, in turn, influence the likelihood to use the system. Implications are drawn for practice and research.