The general purpose of this article is the study of efficacy and legitimacy of hybrid tribunals analyzed from role playing by international law (IL) taking into account the special court for Sierra Leone. Also, the article studies the implications of hybrid tribunals in light of international criminal court ICC in the framed of transitional justice processes. One of the conclusions supposes hybrid tribunals through local system design a strategic organization structure which enables them to get higher acceptation for victim people. Across the IL they warrant the expansion of globalizing standards reflect in parameters and rhetoric of power owner of IL which are inexorable and determinant for the achievement of their legitimacy and efficacy. Finally, permanent courts and international ad hoc courts do not attain efficacy and legitimacy due to having a disconnection with the own reality of victims caused by the warrant of IL superiority, an aspect that makes them appear as self-contented entities. The essay has a research character and its methodology consists on a case study articulated with relevant sources to this specific case.