In this presentation, the authors will present the conclusions of the Special Issue of which they are editors and which includes the papers presented in the two connected panels. In the light of the sectoral presentations, they will take stock of the evolution of the principle mutual recognition as a regulatory mechanism in the European Union, especially from the perspective of administrative cooperation and the development of a system of ‘transnational’ administrative law. Moreover, they will discuss the contribution of the CJEU case law to the shaping of the mutual recognition system and the open problems and current challenges to the system. Finally, they will tackle the relation between mutual recognition and EU fundamental rights and the relationship between mutual recognition and mutual trust and sincere cooperation. It will be followed by a discussion.