weibelt

I know that the way to redeem the 3rd night free cert is to call. Is there any way to retroactively combine this with a reservation made with the Citi Prestige concierge for the 4rth night free?

I know making a new thread is discourage, but the only thing I could find with a search was a 2010 thread that mentioned that someone was able to add a third night free at checkin.