Noticed this change on the new look site today:-
If you have not ordered e-certificate(s) 7 days prior to your stay, e-certificate(s) will be auto-ordered for you.
Clicking on the link brings up the following help box
Auto-ordered E-certificates
If your reservation does not have e-certificates 7 days prior to your check-in date, and you have enough points for the required e-certificate(s), Marriott Rewards will automatically order the required e-certificates for you. This will ensure that you have e-certificates when you arrive for your stay.
Which is wonderful - aside from I have a paper certificate for one stay and really, really don't want anything auto ordered! Am I missing something or is it call time...
T