The topics about transitional justice are complex because they encompass multiple aspects within the concept and its context. The purpose of this paper is to develop the thesis that transitional justice is at the core of negotiation between the State and insurgent forces as it defines justice, truth, reparation and non-recurrence; but it is credible if, and only if it is applicable and applied. The arguments are three: First, agreements on transitional justice are controversial; second, the trends of the recent past show disbelief regarding pronounced expectations: and third, due to the current circumnstances, the "non-recurrence" is fragile because of the probabilities of relapse, which slows the restitution to rights and duties from the State and direct actors.