A Night in Casablanca storyline for the film was intended to be a direct parody of "Casablanca," with the characters having similar-sounding names to the characters and actors in the 1942 film. Groucho Marx has said that an early draft named his character "Humphrey Bogus", a reference to the leading actor in "Casablanca," Humphrey Bogart. Warner Bros. did not actually litigate, or even threaten to litigate, but it did issue a formal inquiry to the Marx Brothers concerning the plot and script of the film. The Marx Brothers exploited the situation for publicity, making it appear to the public that a frivolous lawsuit was
Casablanca (film) Nazis cannot arrest him, saying, "This is still unoccupied France; any violation of neutrality would reflect on Captain Renault," Ebert points out, "It makes no sense that he could walk around freely. ... He would be arrested on sight." In addition, no uniformed German troops were stationed in Casablanca during World War II, and neither American nor French troops occupied Berlin in 1918. According to Harmetz, the usual route out of Germany, at least for people in the film industry, was not via Morocco and Lisbon but via Vienna, Prague, Paris and England. Only the film's technical adviser, Robert Aisner,