Passport Control Process Before Boarding 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.

Cruises check passports through a process called "Manifest Validation" which occurs primarily during the digital check-in and the physical embarkation at the terminal. When you book, you enter your passport details into the cruise line's app. At the pier, a port agent physically inspects your passport to ensure the photo matches and the expiration date is valid (most lines require 6 months of validity beyond the sailing date). For "Closed-Loop" cruises (trips that start and end in the same U.S. port), U.S. citizens can sometimes use a birth certificate and government ID, but passports are highly recommended. Once the ship sails, the cruise line transmits the manifest to the authorities of each country you will visit. In many European and Caribbean ports, you don't even need to show your passport to get off the ship; your "Key Card" or wearable device acts as your ID, as the "clearing" has already been done behind the scenes by the ship’s purser and local customs officials.