In Lars von Trier's Europa (1991), the head of a railroad company in postwar Germany (1945, specifically) must fill out a questionnaire regarding his association with the Nazi Party. This questionnaire must then be verified and approved by either a member of the resistance, or a Jew. Was this a real practice? Did business executives and people in positions of managerial power actually have to report their activities during the war to Allied forces? Most interesting to me, however, is the verification aspect. Was this real?
I have not seen the movie but what you describe sounds like denazification, i.e. the exoneration process for former members of the nazi party in what would later become Western Germany. Signed statements from people prosecuted by the nazi regime were indeed a popular means to procure a "Persilschein" since they could be bought cheaply from the destitute displaced persons liberated from the camps. By the 1950s this practice was first replaced by direct monetary fines and then abolished completely since it became a laughing stock in the German public.
source: John Sandford, Encyclopedia of Contemporary Germany Culture, Routledge, 1999