Federal complaint-handling, ombudsman, and advocacy offices have different forms, capacities, and designations. This book reviews the state of research in this field and the heritage of such offices, examines and compares them, along with recent legislative developments and past proposals to establish a government-wide ombudsman. Furthermore, this book identifies the basic characteristics of these offices, recognising differences among them with regard to their powers, duties, jurisdictions, locations, and resources, concurrent with a complete list of Congressional Liaison Offices of select federal agencies.