I booked two rooms for the same dates at different hotels using the fourth night free benefit. I did this because I wasn't sure where I wanted to stay yet and wanted to secure reservations for they sold out. Citi was fine with me double booking, but they said that I will only be reimbursed for the 4th night free for one of the rooms, and thus I need to cancel the other one before the stay.
Can I cancel the room I'm not using myself through Marriott.com, or do I need to call Citi Prestiege to do this?
I know that I can technically cancel the room myself on marriott.com (it shows up under my trip), but I don't want to invalidate the 4th night free reimbursement for the other stay.