The ship's officers will check each passenger's identification against an official database to ensure that everyone onboard is legally entitled to travel in the country of departure. This process is similar to what happens when entering a foreign country.

Yes, your passport is typically scanned at several points during a cruise, primarily for security and immigration compliance. The first and most critical scan happens during embarkation at the cruise terminal, where port officials and cruise staff verify your identity and legal right to travel. This data is linked to your onboard account and "Key to the World" card (or wearable Medallion). Depending on the itinerary, your passport may also be scanned or checked by local authorities at various foreign ports of call. On some international routes, the cruise line may even hold your physical passport in a secure vault for the duration of the trip to facilitate bulk immigration clearances for the entire ship, though this is becoming less common with digital systems. For "closed-loop" cruises (starting and ending at the same U.S. port), while a passport is highly recommended, other forms of ID like an Enhanced Driver's License may be scanned instead. Regardless of the requirement, having a passport that is valid for at least six months beyond your travel date is the safest way to ensure a smooth boarding process.