Thumb Score: +8 Carnival Cruise $100 Gift Card (Email Delivery) for $90 With Promo Code: EMCPTEE34The world's Most Popular Cruise Line Give the gift of fun The perfect gift Email Delivery The Carnival Gift Card is a pre-paid gift card similar to a gift certificate that can be used as payment toward a cruise booking on any of our ships*, pre-purchased shore excursion, spa experience or toward your onboard spending account. Limit: 3 Q: Can I redeem a Carnival Gift Card as payment toward an existing booking?