A well-established research area is service failure and recovery. Nevertheless, the considerable service failures generated by customers, or customer failures, surprisingly remain relatively underexplored. Specifically, customer failures have a detrimental effect on frontline service employee well-being, which has not been investigated. We advance that a customer apology can alleviate this by customers taking the blame for their failures.We present three studies that investigate this phenomenon. In Study 1, applying the critical incident technique, we develop a taxonomy of customer failures and find evidence of their negative influence on (frontline) service employee well-being, which can be offset by customer apologies and perceived supervisor support. In Studies 2 and 3, using a scenario-based experiment, we triangulate the Study 1 results by testing the relationship between customer apology (Study 2) and its interacting relationship with perceived supervisor support (Study 3) on service employee well-being following a customer failure.While customer apologies have a positive impact on well-being, interestingly, when perceived supervisor support is lacking, this washes out the positive effect of a customer apology and similarly, perceived supervisor support nullifies the negative effect of the customer not apologizing for their failure. Theoretical and managerial implications are discussed.