the anticipated termination of a trial, from the perspective of procedural systems, is a manifestation of the inquisitive approach, because it implies the renouncing of contradiction and public trial. In all trials, independently of whether or not its termination is brief, the state must prove beyond all doubt the responsibility of the accused. Judicial control of trials that terminate by acceptance of charges or by agreement imply the material exercise of the judgment function, which in turn demands verification of proof as the basis for the sentence. the types of agreement that involve modification of the de facto accusation are based on the principle of opportunity, which means that its relevance must be supported by legally developed criminal policy considerations. the concept of violation of fundamental guarantees as a limit to preliminary agreements in Colombian legislation. the opportunity for retraction by the prosecutor and by the accused. Impediments in the case of the agreement being overruled by the judge. the types of agreement in Colombian legislation from the point of view of the object.