In this article we explain and reflect critically upon the athlete whereabouts reporting system in top-level sports initiated by the World Anti-Doping Agency (WADA). This system makes it compulsory for athletes who are in a registered testing pool in their national and/or international federation to submit information about their whereabouts. In this way, athletes are required to be accessible for no advance notice doping tests all year round. If such information is not submitted, or if the information provided is incorrect and athletes cannot be found when a no advance notice test is supposed to be taken (a missed test), they may be given a warning. In most sports and national anti-doping regulations, three such warnings within 18 months may be regarded as a violation of the doping regulations and may lead to exclusion from sport for a period of between three months and two years. The system is controversial. In this article we will examine the key objections to the system and, more specifically, objections connected to ideas of justice and athletes' autonomy and right to selfdetermination. The argument will be a practical ethical one informed by a survey on attitudes towards the whereabouts system carried out among 236 athletes belonging to the registered testing pool in Norway. We conclude that if the basic principles of anti-doping work are 1 accepted, WADA's whereabouts system represents nothing other than an efficient extension of this work.