Originally Posted by
Marriott Bonvoy Lurker
Hello ChurnieEls,
The guest would make the choice at check-in with the front desk. If you do a mobile check-in, you would automatically get points, although this can be changed if you go to the front desk and change it at the beginning of your stay.
Awesome to get a take on this from an official channel.
A few properties I've stayed at seemed to think the choice was theirs to make.