A future cruise credit number is a unique identifier linked to a specific amount of money that you can apply towards a future cruise booking. It's typically issued by cruise lines when you cancel or change an existing reservation, or when you receive a refund or compensation for a cruise that you were unable to take.
Future cruise credits are a valuable way to save money on your next cruise vacation. They can also be used to upgrade your cabin, book additional excursions, or purchase onboard amenities. In the past, future cruise credits were often issued as paper vouchers, but most cruise lines now use electronic systems that allow you to view and manage your credits online.