Originally Posted by
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.
You can apply the 3rd night free cert anytime between making the booking and checking in (possibly also at check-in, but I wouldn't count on it)
Your bigger issue is with using the Citi Prestige benefit which requires actually paying for 4 nights. There were some reports here that one could combine both benefits, but there were also reports that Citi has been taking a closer look at the billed amount (i.e. ruling out this option).