Sumário:The establishment of the World Bank Inspection Panel and subsequent diffusion of IAMs -- The main characteristics of IAMs : Functions, activities and multipurpose nature. Structural characteristics. Procedures -- Ensuring the mechanisms' independence : Nomination procedures and other structural features. Procedural hurdles -- IAMs in practice : Some general data. The typical outcome of IAM review (and who determines it). Characters and extent of compliance review -- Closing comments : IAM effectiveness and proposals for reform. The legal nature of IAMs.