Originally Posted by
sfozrhfco
Keep in mind that it may take 2-3 months to have the certificate post. If the timing works out in theory you can change the form of payment. The Marriott website often defaults to choosing the certificate first and without realizing it you may end up using it when a points reservation was intended. I have changed the certificate reservation back to a points one without a problem so I assume the reverse should be possible if the timing works out for you.
I saw that the terms and conditions say 8-12 weeks. Do you know how long it normally takes? I have seen plenty of places where it says to allow weeks or months and it posts within days for points/bonuses with other rewards programs.