Originally Posted by parnel
You can turn it in at the a/p ticket counter the day you use it;just let them know.
I am not sure this is the case. Last time I used one of these I had 7 days to issue the ticket, which can only happen once the cert is handed over. I dont see you being allowed to wait until the day you fly - unless it is very soon, as you would be holding a seat without ticketing it.