You can return media at all library locations. At the Central Library, there is a machine that takes your media back during the general opening hours - returning media at the service-desks is only possible during the service hours. You will not need you SLUBCARD to do so. There are some media which cannot be returned at the machine. These include: audiovisual media (CDs, CD-ROMs, DVDs, video cassettes and records), notes with voices, as well as media borrowed via interlibrary loan and keys for book boxes.