Originally Posted by
DaveInLA
.... automatically tie the MR accounts? ...
Normally, but there is a small possibility that a new MR account will be created. (I have never had this happen.)There may not be a way to verify that the new card is linked to the existing MR account until it is physically received, but if there is an opportunity to create/use a UserID during the application process the new account might show up online before the physical card arrives. You do not need to use the same UserID to link to the existing MR account.
In any event it's not critical because the co-branded cards will preserve the points during the transition. Terms are here:
https://rewards.americanexpress.com/...v=footer-tandc
If you voluntarily cancel your enrollment in the program (or if you are an Additional Business Card Member with your own separate program account and the Basic Business Card Member voluntarily cancels his/her enrollment in the program), but you keep at least one American Express® Card open and is not past due or canceled, you'll have up to 30 days from the date of cancellation to use any points in your program account.
If you voluntarily cancel your enrollment in the program (or if you are an Additional Business Card Member with your own separate program account and the Basic Business Card Member voluntarily cancels his/her enrollment in the program) and you don't keep open any American Express Cards, all points in your program account will be immediately forfeited.