Despite the increased incidence of intergroup apology in public life, very little empirical attention has been paid to the questions of whether intergroup apologies work and if so, why. In a series of experiments, Australians read scenarios in which Australian interests had been harmed by an outgroup. Participants were then told that the outgroup had either apologized or had not apologized for the offense. Although the presence of an apology helped promote perceptions that the outgroup was remorseful, and although participants were more satisfied with an apology than with no apology, the presence of the apology failed to promote forgiveness for the offending group. This was the case regardless of whether the effectiveness of apology was measured cross-sectionally (Experiment 1) or longitudinally (Experiment 2). It was also the case when the apology was accompanied by victims advocating forgiveness (Experiment 3) and was independent of the emotionality of the apology (Experiment 4). In contrast, individuals who apologized for intergroup atrocities were personally forgiven more than those who did not apologize (Experiment 4). Theoretical and applied implications are discussed.