Abstract This chapter examines the political, technical and financial support provided by the EU to one of the institutions of the transitional justice system created as part of the Peace Agreement: the Commission for the Clarification of Truth, Coexistence and Non-recurrence. The implementation of the Agreement, and transnational justice in particular, have faced at least three challenges: (i) in carrying out its mission, while communicating progress effectively so that the public understands its importance, building hope for a peaceful future; (ii) in ensuring its methods guarantee the broadest possible access for the country’s victims to ensure the political legitimacy of its results; and (iii) in guaranteeing that there are sufficient resources for this to take place. Understanding these challenges, the EU has been a strategic partner of the institutions of the Comprehensive System, especially the Truth Commission. It has also allowed the Commission to expand its territorial presence, making it more accessible to victims and ensuring plural listening, which has formed the basis of the method for clarifying the truth and helped boost the impact of the communication processes in Colombian society.