Originally Posted by
smmrfld
The responsibility lies with the FD agent to properly account for the cash and complete the check-in, not the guest, and there are inevitably cameras focused on the FD in the extremely unlikely event that any follow-up proof is needed.
+1 - Exactly. Customers don't need "proof of legality" in this country. What the hotel uses for its own internal systems is the hotel's business. If you can get a $250 room for $50 in cash, that's your side of the transaction.