I know on other cruises that we have taken to the Caribbean, a DL and certified copy of birth certificate was all that was needed. Except just recently in Barbados because of the change. We also never had to relinquish our passports on any cruise except on the Silver Whisper. Not sure why. We also didn't have to give up our passports when we did our Med cruise. Some people even carried their passports with them when they disembarked the ship, but after having ours stolen in London, we never carry the actual passport on our persons when we disembark, we just carry a reduced laminated copy.