The International Tracing Service (ITS), in German Internationaler Suchdienst, in French Service International de Recherches in Bad Arolsen, Germany, is an internationally governed centre for documentation, information and research on Nazi persecution, forced labour and the Holocaust in Nazi Germany and its occupied regions. The archive contains about 30 million documents from concentration camps, details of forced labour, and files on displaced persons. ITS preserves the original documents and clarifies the fate of those persecuted by the Nazis.