Top Hat, White Tie and Bomb Sights - S1-E10
Continuity mistake: As Burkhalter talks to Klink, he raises his hand for emphasis on a point. When the camera cuts to a wide shot, you see his arm down by his side, much too quick without a movement to relax the arm.
Top Hat, White Tie and Bomb Sights - S1-E10
Continuity mistake: When Hogan is looking around as Klink is showing the gate to Burkhalter. Hogan's hat is up on his head in the usual position. After the camera cuts to Klink, then back to Hogan, the bill of his hat is down shading his eyes.
Answer: It's a comedy, not a documentary.
stiiggy
Perhaps it was counterfeit. There are numerous episodes where they deal in counterfeit monies.