This was recently posted on the cruise line board:
DCL has just released a reminder about documentation requirements. This is especially important for Canadian citizens, who were able to travel withOUT a passport before. That is no longer the case. Here is the updated information:
IMPORTANT DOCUMENTATION REMINDER
We would like to clarify our position regarding acceptable documentation necessary to travel aboard our cruise ships.
All U.S.citizens must travel with proof of citizenship. These include one of the following:
Valid U.S. Passport
Certified birth certificate with acceptable picture identification. Copies of birth certificates without a raised seal are not acceptable.
Certified Naturalization certificate with acceptable picture identification.
Acceptable forms of picture identification are state drivers license, or federal, state or local government photo ID card. Guests age 17 and under who are U.S. citizens are only required to have proof of citizenship, excluding picture identification.
All non-U.S.citizens, including alien residents of the United States, must have valid passports and necessary visas at time of embarkation to ensure his/her ability to re-enter the U.S. upon the ships return. Travel documents required throughout the vacation are the responsibility of the Guest.
These guidelines are based on U.S. government regulations, which are subject to change at any time. It is the Guests responsibility to check with their travel agent, government agencies, embassies or consulates prior to their vacation to ensure that they have proper documentation.
Unfortunately, any Guest traveling without proper documentation, as mentioned above, will not be allowed to board the vessel . We hope this clarifies our position regarding acceptable documentation.