Ernst Kaltenbrunner
In May 1944 Ernst Kaltenbrunner, an SS (general) in the (Reich Security Main Office; RSHA), ordered that the counterfeiting unit begin to produce forged US dollars. The artwork on the notes was more complex than that of the British currency and caused problems for the forgers. Additional challenges they faced included the paper, which contained minute silk threads, and the intaglio printing process, which added small ridges to the paper.