This book provides a comparative analysis of the process of breach across ten different European jurisdictions by identifying and elaborating a number of key analytical themes through which the different systems can be compared and evaluated. It is informed by and hopes to advance the research activities of the COST Action IS1106 on Offender Supervision in Europe, particularly the Action’s work on developing new comparative methodologies to examine the process of decision-making involved in the breaching of offenders for non-compliance. This volume consists of country chapters and thematic chapters. Analyses are based on exhaustive reviews of the literature available in each jurisdiction as well as the results of an empirical pilot study to provide a unique and valuable insight into current practice as well as enhancing our understanding of the contingencies and vagaries of the processes of breach as they exist in both civil and common law European jurisdictions. The key themes and emerging concerns that are explored include: the roles and responsibilities of the different actors involved in the breach process; the degree and nature of discretion exercised by decision-makers; and legitimacy, due process and procedural requirements of breach processes both from a pan-European and from a comparative perspective.