I have heard of many examples of the allied forces using double agents and other forms of deception to trick the German forces into believing there was an attack planned for one location in order to draw forces away from the real invasion location. Some examples I have found are Operation Mincemeat, Operation Bodyguard, and Operation Fortitude. Did German forces ever do anything similar to this in order to deceive allied forces?
There is a book called Double Cross, by Ben Macintyre, which is about Allied double agents deceiving the Germans before D-Day. The book explains that Germans in charge of spies were usually just trying to avoid military service. They lived in neutral Lisbon, Spain and lived a life of luxury, nice cars, fancy houses, parties every night (one guy even owned a monkey). This was paid for by taking money that was supposed to go to spies from Berlin. They believed pretty much anything the, now double agents, told them, and would pass it onto Berlin
This book also said that every spy sent to Great Britain was either turned, or captured. It says that the US was good at catching spies, but did not believe in double agents the same way as the British, so the US just killed the spies it caught.
Double Cross is a really good book and I highly recommend it