After the war, residents’ registration offices were among the organizations asked to compile all the information they had on foreigners registered with them. The information was requested in connection with the foreigner tracing campaign (Ausländersuchaktion). This is how this list with information about three Hungarian civilian laborers came to the International Tracing Service (ITS), the predecessor institution of the Arolsen Archives, from the Altötting residents’ registration office. The lists were accompanied by letters in which the relevant organizations – in this case the residents’ registration office – indicated whether or not they had any other documents.