Originally Posted by
slowly
I'm questioning Marriott's ability to retroactively change T&C on certificates already issued which state that they are valid at any Marriott hotel in Europe.
They are not "retroactively" changing it. They are giving you around 3 months notice before the change occurs, and they are honoring any reservations/awards made before Jan. 15, even if those reservations are made for well after Jan. 15.
So I don't see the retroactive part here.