My wife last year got an offer from citibank for two free hotel nights. She booked it through Spirit and then later she canceled it due to hurricane. That reservation is a Marriott FLEX AWARD and the AWARD can be reused for another reservation. Since the AWARD will expire soon, I would like to use it for my reservation. I made a successful reservation, but the confirmation says "Please be prepared to turn in your incentive stay certificate." But I don't have a paper certificate and we got the certificate number from Spirit reservation confirmation email, and that reservation is under my wife's name.

Is a FLEX AWARD certificate number associate with any person's name? It seems that anyone can use the number to make a reservation, will the name be matched at check-in?

Is it normal to have words "Please be prepared to turn in your incentive stay certificate." in a e-reward confirmation? If the hotel staff ask me to show certificate at check in, what can I do?

Can I add my wife's name to my reservation and will that ensure the certificate be valid for this reservation?