Globalisation and technological innovation have been fuelling the need for increasing levels of trust in private actors, such as companies or special interest groups, to regulate and enforce significant aspects of people's daily lives: from environmental and social protection to the areas of food safety, advertising and financial markets. This book investigates the trust vested in private actors from the perspective of European citizens. It answers the question of whether private actors live up to citizens' expectations or whether more should be done as to the safeguarding of citizens' interests. Several cross-cutting studies explore how private regulation and enforcement are embedded in EU law. The book offers an innovative approach to private regulation and enforcement by focusing on the specific EU context which, unlike the national and transnational ones, has not yet been widely explored. This context merits a stand-alone analysis because of the unique normative framework of the EU, as a particular polity itself but also in relation to its Member States. With an overall analysis of the main aspects of private regulation and enforcement across different policy fields of the EU, the book adds a missing tile to the mosaic of public private governance studies.