This work brings together a number of papers written by experts, mostly senior and active international civil servants, but also retired staff, analyzing the measures taken in international organizations in order to obtain greater accountability. Codes of conduct have been introduced, as well as more detailed measures of control. This has also required review of due process and dispute resolution provisions.The main objective of these codes of conduct is to foster appropriate behaviour of staff, but, ideally, these codes should also be instrumental in avoiding disputes, since staff knew more clearly what is expected of them. This book is a reflection of exchanges of views and information between administrative lawyers and, to some extent, investigators/prosecutors to ensure that the organizations become more transparent, corruption free and respective of the highest standards. Accountability and transparency have now become the rule, and increasingly also the practice. Much is still to be done, however. Discussions are ongoing in many organizations. This work’s purpose is also to contribute to these discussions.In addition to the analytic and frank contributions, this work contains various documents of international organizations, reflecting the codes of conduct and charters of values now in place.