So they check the bill and see that you incurred a $500 fine for smoking in the room they paid for? How does this help :(

At some point the question is: "Do we trust the employee we've had on the books for the last few years".

Fortunately, the mid-sized places I've been at generally trust the employee's story when it comes to expenses -- at least unless it becomes a pattern.

If my workplace took the hotel's side for a bogus charge, I'm not sure I'd want to stay working there...