Here are the requirements for needed paperwork with Carnival Cruise Lines (just grabbed a popular cruise line)
Proper travel documentation is required at embarkation and throughout the cruise. Even though a guest has completed registration using Online Check-in, it is still the responsibility of the guest to present the required travel documents at the time of embarkation. Guests should check with their travel agent and/or government authority to determine the travel documents necessary for each port of call. Any guest without proper documents will not be allowed to board the vessel and no refund of the cruise fare will be issued. Carnival assumes no responsibility for advising guests of proper travel documentation.
Carnival highly recommends that all guests travel with a passport valid for at least six months beyond completion of travel. This will enhance the debarkation experience as delays may be expected upon return to the United States for those without one. Additionally, this will enable guests to fly from the United States to meet their ship at a foreign port should they miss their scheduled port of embarkation and allow guests who must disembark the ship before their cruise ends due to an emergency to fly back to the United States without significant delays and complications.
Europe and Transatlantic Cruises
U.S citizens are required to carry a passport, valid for six months beyond the date of their visit. Guests are not required to have a Schengen Visa or other visas.
Domestic Cruises
For cruises that begin and end in a U.S port, the following WHTI-Compliant Documents are acceptable for cruise travel. These standard forms of documentation will enable the Department of Homeland Security to quickly and reliably identify a traveler. If a picture I.D. is not affixed to the WHTI-compliant document, a picture I.D. is required (a valid, unexpired government-issued photo I.D. for all guests 16 years of age or older). If the cruise includes air travel to or from Canada, a valid, unexpired U.S. passport is required.
- U.S. Passport
- Passport Card
- State Enhanced Driver's License
- Certificate of U.S. Naturalization
- Native American Indians
For cruises that visit Greenland, all guests are required to carry a passport with validity of at least 6 months after the last day of the cruise.
Also acceptable for cruise travel (for cruises that begin and end in a U.S port), U.S. citizens can show proof of citizenship, such as a birth certificate issued by a government agency and accompanied by government-issued photo identification. If the cruise includes air travel to or from Canada, a valid, unexpired U.S. passport is required. Guests who have committed or been convicted of a crime may not be allowed into Canada - for more information,
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A WHTI-compliant document including:
- U.S. Passport.
- U.S. Passport Card.
- Trusted Traveler Card (SENTRI, NEXUS, FAST)
- Valid Merchant Mariner Document (MMD) when traveling in conjunction with official maritime business.
- Valid U.S. Military identification card when traveling on official orders.