Ultra rare receipt from a conctract document to a Jew who was used as slave laborer, issued in 1940. Name of the Jew was Benzion Weber and he was from Wola Duchacka, in Poland. Hundreds of thousands of Jews were used by Germans as slave labor, many of them from Ghettos and other from concentration camps. We can see the word "Zwangsarbeit" that means Slave labor.