PurposeThis paper aims to examine how observers evaluate a company that provides service failure (or excellence) to an immoral versus a moral customer. This study introduces the concept of deservingness to the service literature and suggests that observers appreciate when a company delivers “justice” – either bad service to an immoral customer or good service to a moral customer – and thus evaluate the company more favorably.Design/methodology/approachThis paper presents three online studies using scenarios (ns = 205, 199 and 181) and one lab study (n = 89) using a confederate to manipulate customer morality.FindingsAcross four studies, this study finds that a service failure has a less negative impact on observers’ company evaluations when observers consider the target customer immoral, and thus deserving of the bad outcome. Conversely, the positive impact of observing service excellence is enhanced when observers consider the target customer to be moral, and thus deserving of a good outcome. This effect occurs because the perception of deservingness leads observers to experience more positive feelings about the service outcome and these positive feelings transfer over to observers’ evaluations of the service provider.Research limitations/implicationsThe mechanism shares some similarities with the concept of immanent justice reasoning, whereby individuals draw a causal link between someone’s prior immoral behavior and an unrelated negative outcome. However, the studies go one step further by showing that such causal reasoning, at least on a moral level, can impact the judgments of the other party (in this case, the company involved in the service outcome).Practical implicationsService providers need to be particularly attentive when serving customers who are viewed in a positive light, as an observed failure that affects a moral customer can be particularly damaging to company evaluations. Conversely, companies should make efforts to publicize when exceptional service is given to nice, admirable customers, as this is particularly effective at improving evaluations.Originality/valueResearchers have examined how allocations of responsibility affect observers' evaluation of service encounters. This paper adds deservingness as an alternate mechanism and examines service excellence as well.