 Yad Vashem awarded Hammann the title of "Righteous among the Nations".Yisrael Meir Lau, current chairman (as of May 2010) of Yad Vashem Council, was one of the children saved by Hammann.In 1946, the American authorities questioned Hammann's real role as a privileged prisoner, accused him of active collaboration with the SS and imprisoned him at Dachau concentration camp.