Upon request of the PETI Committee, the Policy Department on Citizens' Rights and Constitutional Affairs commissioned the present analysis, which examines the situation in relation to openness, transparency, access to documents and information in the EU. Case law and developments in the jurisprudence of the CJEU are examined, notably for legislative documents, documents relating to administrative proceedings, to Court proceedings, infringement proceedings and EU Pilot cases, protection of privacy and international relations. Current and future challenges, as well as conclusions and policy recommendations are set out, in order to ensure compliance with the Treaties’ and Charter of Fundamental Rights’ requirements aimed at enhancing citizens’ participation in the EU decision-making process, and consequently stronger accountability and democracy in the EU.