Paper of: The 4th International Workshop on Trustworthy Internet of People, Things & Services, co-located with the Internet of Things 2010 Conference, November 29 to December 1, 2010, Tokyo, JapanIn this paper we analyse the problem of providing an user-managed system for sharing the user’s location information in the Future Internet of Services, and propose some architectural mechanisms to support this kind of system. Our approach is based on the work done within Kantara’s UMA WG. Furthermore, we highlight open issues that still need to be addressed in location information sharing scenarios.Enviad