The 2023 EEAS Peace Mediation Guidelines underscore the need for mediators to understand  transitional justice frameworks. Previously viewed as a post-conflict issue, ignoring transitional justice in peace processes often led to peace deals lacking credibility and public support. Lasting peace  necessitates addressing the legacy of past large-scale abuses through transitional justice measures.   The European External Action Service (EEAS) is the European Union’s diplomatic service. Since 2011,