Cruise Carnival stops selling certificates for future cruises By Tom Stieghorst / September 14, 2012 Share 1 -- Carnival Cruise Lines will discontinue a program in which passengers on a cruise could buy certificates good for future cruises. The Carnival Future Vacations program will end on Sept. 27 on all sailings, Carnival said on GoCCL.com. Passengers on many ships will still be able to make a confirmed booking for future travel, Carnival said, and travel agent commissions will be paid if the passenger says they use an agent. Outstanding certificates will be honored up to the expiration date printed on the face of the certificate. Carnival said it is discontinuing Carnival Future Vacations "due to its low economic performance." Future cruises can't be booked aboard five Carnival ships: Imagination, Inspiration, Sensation, Spirit and Victory. On other ships, guests can get an onboard credit ranging from $50 on a three-, four- or 5-night cruise, to $200 for a cruise 12 days or longer, as an incentive to book while sailing. Follow Tom Stieghorst on Twitter @tstravelweekly.