I will order e-certificate(s) upon earning the required points.

Guys

I'm trying to understand the above statement on the reservation page using points. I have 17k points and need 20k room and chose this option. Does this mean the room was fully reserved for me and I have to go back and associated the points to this reservation before the stay or would this automatically happen? I should be getting 4k points added to my account from some credit card spend soon
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Thanks