Registration document issued to the Jew Bialek Dawid Lejb - Mosaisch The most important objective for the Germans when they conquered a place in a foreign country was to "clean" it from Jews, who were the biggest enemy for Nazis and most of the efforts were concentrated on that objective, no matter the side effects. Only few of these documents survived the war, since these must be carried by the Jews with themselves everywhere they went. Most of them disappeared forever with the mass killings and liquidation of the ghettos, carried out during by nazis and their thugs during the 40's. So these are trully scarce and rare documents, and very difficult to come across.