Sounds kinda fishy to me Tara.. I'd get more info. before getting one if you are considering it. Once you have cruise on Carnival, they will be sending you "past cruiser" specials in email all the time for various things. Make sure your email address is setup in your profile on the CCL website. You will also get a past cruiser # to add and that should trigger specials too. I'm not sure I'd risk that some coupon would actually be honored or not.
Carnival Cruise Lines:
Fantasy 90, Celebration 95, Victory 05, Conquest 05, Spirit 6/06, Freedom 6/08, Holiday 7/08, Victory 6/09, Valor 9/09, Dream 6/10, Splendor 8/10,Conquest 8/11,Magic 11/11,Triumph 4/12,Spirit 7/12,Freedom 11/12, Triumph 2/13 - The fire cruise
NCL Dream October 2006, RCCL Mariner OTS June 2007, Celebrity Silhouette 2013