In May 1942 German spy Marius A. Langbein was sent by his superiors to Canada, where he was instructed to observe enemy shipping movements in Montreal and Halifax. What, however, did Langbein actually do?
Answer: He decided to use the money he received from German intelligence agents to start a new life, and instead relocated to Ottawa. He later surrendered to Canadian authorities in December 1944, but was found not guilty of spying as he had committed no actual espionage.
Source: Cargo of Lives by Dean Beeby