Tip your servers at the end of your cruise by simply doing nothing. Gratuities of $10 per day, per guest are automatically added to your Sail and Sign Card when you board your ship. This is a mandatory fee to all Carnival cruise passengers.
Offer tips when you feel its appropriate. Despite the fact that tips are automatically paid for by your Sail and Sign Card, you can still offer monetary compensation to your stateroom attendant or room service waiter whenever you choose.
Tip your maitre d' an additional amount by using the envelopes left in your stateroom prior to your dinner seating on the last night of the cruise. This is not mandatory, but it is appreciated.