Never Play Cards with Strangers - S4-E7
Trivia: On the wall that is adjacent to the door to Klink's office, there is usually a picture of "Old Bubble Head" (as Hogan calls him in this episode) talking at a podium; that is usually where the bug is located for Klink's office. This time, however, there is a picture of Hitler standing with a group of people, possibly a parade review.
Answer: It's a comedy, not a documentary.
stiiggy
Perhaps it was counterfeit. There are numerous episodes where they deal in counterfeit monies.