A FlyerTalk Posting Legend
Join Date: Jul 2002
Location: MCI
Programs: AA Gold 1MM, AS MVP, UA Silver, WN A-List, Marriott LT Titanium, HH Diamond
Posts: 53,002
Do a search in the United forum on "CS50 expiration". That should yield a few threads. I believe the rumor is true: the certs need to be applied to a ticket by March, although the travel itself could take place later.
Coupon Connection is the place to possibly acquire CS50's from other FTers.