The article presents the contribution of Professor Skubiszewski to the work of the Iran-United States Claims Tribunal during the period of his presidency (1994–2010). The article discusses the cases of Iran-United States Claims Tribunal decided during that period (dual-nationality cases, intergovernmental disputes and military contract cases) and the challenges which Professor Skubiszewski had to confront. Also considered are the more general problems encountered, such as unexpected extended existence of the Tribunal and its slow pace of work. In conclusion some general comments are drawn on the contribution of Professor Skubiszewski to the trajectory of the Tribunal, and on the future of the Tribunal itself.