i have no problem with putting tips on the sign and sail card, but I don't want to tip if the service is not up to par. Can I wait until the last evening to decide if I want to go to pursers desk and change the amounts of tips.
I would think on the last evening the purser's desk might be crowded so you might want to consider doing this a day or two before. We found the purser's desk to be understaffed and overworked and waited about 20 minutes early in the week of our cruise and we were 4th in line. They will provide you with envelopes if you choose to go that route. Our steward, waiter and asst. waiter were the best and we felt it was more personal to hand them an envelope with a short thank you note. Enjoy your cruise!