"For your convenience, charges for most of your onboard purchases are made to your sail and sign acount. A required application form wil be included with your documents. Carnival accepts American Express, VISA, MasterCard, Discover Card and cash for deposit on your account . (A minimum deposit will be required for cash accounts: 2 to 4 day cruises-$100; 5 to 8 day cruises-$200; 9 day or longer cruises-$350)."
I called Carnival customer service to confirm a few things. Here is what I was told. It was $250 per person (including my 13 yo son) for our 7 day cruise on the Glory, not the $200 that is indicated in their literature. The hold can be made on a check card, credit card or with cash. They do not place an additional hold when you use up the initial deposit, just add the amount to your "tab". At the end of the cruise (the night before), they will debit either your credit card, check card, or ask that you come and pay the balance with cash.
I used my check card and it took over a week for the charges to show up from my checking account.
We ended up spending more of our cash that we had originally planned in the ports.
Carnival Elation March 11
Carnival Imagination Sept 07
Carniival Sensation Dec 06
RCI Sovereign of the Seas Sept 06
Carnival Miracle Sept 05
Carnival Glory Sept 04
Carnival Fantasy Jan 04