総統大本営
Incriminating letters show that Wolff was involved in the Holocaust. On 8 September 1939, shortly after the invasion of Poland, Wolff wrote to the Gestapo office in Frankfurt (Oder) and ordered the immediate "arrest of all male Jews of Polish nationality and their family members" and the confiscation of any wealth. In 1942 Wolff oversaw the deportation transports during "Grossaktion Warschau", the mass extermination of Jews from the Warsaw Ghetto. When rail transport bottlenecks occurred, Wolff communicated repeatedly with Reich Railway Director Albert Ganzenmüller. In a letter sent from the Führer Headquarters, dated 13 August 1942 and referring to transports of Jews to Treblinka extermination camp, Wolff thanked Ganzenmüller for his assistance: