Continuity mistake: Klink's name is still on his office door in one scene but suddenly changes to Privat with no one touching it. (00:18:40 - 00:19:15)
Continuity mistake: When Hogan and Klink are getting ready to take off, they are on a regular paved runway. In the wide shot of the plane, it's going down and taking off from a dirt runway.
Answer: It's a comedy, not a documentary.
stiiggy
Perhaps it was counterfeit. There are numerous episodes where they deal in counterfeit monies.