Originally Posted by mooper

*Never* deal with that. Give them the card info (I carry a xerox of it for that purpose), politely tell them to figure it out on their own time and pace, and walk. As long as your GC is legit and has he required balance, you've met Marriott's payment terms and you have no further obligation to explain or deal with their complaints or incompetence. If they charge your CC instead, simply charge back. Marriott corporate policy is on your side.