I had my TA put a request in for me for the date/time that I wanted & at that time I also booked my room...as soon as I received confirmation of the wedding with the confirm number, I had to go back on the RIU website, put that number in to solidify everything, and then I received a receipt a few days later. To lock in your date and time, you have to have your room booked, or else they will release your date and time within I think 2-3 months.