The competing views of fairness theory (Folger and Cropanzano, 1998 and Folger and Cropanzano, 2001) and fairness heuristic theory (Van den Bos, Lind, Vermunt, & Wilke, 1997) were tested by studying the effects of interactional (IJ), procedural (PJ), and distributive justice (knowledge of others' outcomes [OO]) upon evaluations of outcome fairness and customer satisfaction. The participants, 369 undergraduates, were randomly allocated to scenario-based experimental conditions. A 2 (IJ) נ2 (PJ) נ4 (OO) MANOVA and stepdown analyses provided evidence of "fair process" across all levels of distributive justice for outcome fairness (p<.001) and satisfaction (p<.001), but only in relation to the effects of interactional justice. No such effects were found for procedural justice. Implications for the development of justice theory are discussed.