“Special operation Jews” were registered in different ways in the Dachau, Buchenwald and Sachsenhausen concentration camps. Researchers have determined that documents were not created for them in all parts of the camp administration. In Buchenwald, for example, they were recorded in a separate card file, but they did not receive a Prisoner Registration Card. For this special card file, halved arrivals cards were used which would otherwise have been filled out for report leaders. There was a special stamp indicating the reason for arrest: Judenaktion vom 10.11.38 (“Jew operation of 10 November 38”). In Sachsenhausen concentration camp, the same cards were used, but they were not cut in half and there was no stamp for the reason for arrest. However, the Jude (“Jew”) stamp in the upper right section is identical.