The Hollerith erfaßt (“recorded by Hollerith”) stamp can be found on Prisoner Registration Cards for men and women who were imprisoned in a concentration camp from July/August 1944 onwards. At this time, all prisoners who were “able to work” were supposed to have their details recorded using Hollerith tabulating machines so that their labor assignments could be arranged centrally in Berlin. Although this project, which was organized by the SS Chief Economic and Administration Office (WVHA), was never really successful, data on hundreds of thousands of concentration camp prisoners was transferred from Prisoner Registration Cards to what were known as Hollerith preparatory worksheet cards. Once the data had been transferred in this way, the Prisoner Registration Cards were stamped with Hollerith erfaßt. If a document bears this stamp, it can be assumed that the respective individual was still alive in the summer of 1944.