Originally Posted by C17PSGR

Rewards/SPG/Bonvoy number

On my Marriott folios from this week, it shows my Rewards number as XXXXXX ... without any letters
On my SPG folio from this week, it shows my Rewards number as Uxxxxx

In one of the threads, people realized that SPG folios were showing as PXXXXX if they were platinum, TXXXXX if they were PPE (soon to be Titanium), so wondering if UXXXX meant ambassador