Originally Posted by
mediamonkey
For reasons I shan’t bore you with my upgrade through AMEX to Marriott Gold hasn’t gone through still but my wife’s has. We check in to a hotel tomorrow for a week. If I put it under my wife’s number, can I change it to my number during the stay so I get the points and nights on my account?
If you change to your number but not to your name you won't get credit. Also, you'll lose out on Gold point bonus if you change everything to you.
It's very likely Amex created a new account in your name that is Gold status. Find that account number and just change it to that number, in your name. You can merge your accounts later.