In this research, we investigate a phenomenon when service staff provides more service than customers need, what we call excessive service, service redundancy, service over-generosity, or simply over service. We examine the effect of customer dark triad personality traits on their acceptance of over service, which in turn influences customer satisfaction and returning intention. In addition to examining customer personalities as predictors, service setting’s privacy was examined as a contingent situation. We argue that people are more likely to accept over service when they are served in a pubic setting than in a private setting. We collected our data using survey and lab experiment from Credamo, and tested our hypotheses with regression and ANOVA. Our results supported most of our hypotheses.