Chapter 2 dwells upon the operationalization of the reparative dimension of international criminal justice at the international level, with a focus on the historical evolution of reparations by international criminal courts and tribunals prior to the ICC, and the reparative justice model devised by the Extraordinary Chambers in the Courts of Cambodia (ECCC). The goal of this chapter is to retrace the diverse models in place in international criminal tribunals in regards to reparations, from a model that excludes reparations from criminal proceedings to one that has a role for victims and encompasses reparative dimensions of justice. Concerning the latter, this chapter analyzes in-depth the reparation regime developed at the ECCC, including the role of parties civiles, and the rich developing case law of the court regarding reparations. This chapter provides a careful analysis of all decisions on reparations and submissions of the parties, it engages with critical scholarship on the system developed at the ECCC, the impact of reparation orders for victims and discusses practical and policy considerations of the types of reparation that can be ordered (collective and moral reparations). It also analyses the partie civile system under which the ECCC operates and discusses the contribution of the evolving case law to the development of reparative justice for international crimes.