This article discusses what makes an amnesty legitimate. The author does this by evaluating amnesties in light of international law critiques of amnesties for human rights violations and from principles of both Anglo-American and international law. First, the author breaks the international law critiques into three schools: the obligation to prosecute, the fundamental rights of victims, and the social stability. From these schools, the author derives principles to evaluate the legitimacy of amnesties. After establishing that the doctrine of non bis in idem is not a barrier to evaluating the legitimacy of foreign amnesties, the author selects areas of law that reflect policies and principles applicable to amnesties, including international r...