Originally Posted by
Goldorak
Just noticed, comparing my physical Platinum card from last year and my virtual Diamond 2020 card in the App that my membership number has changed. Two digits have changed :
- Platinum : XXXXXX4 XXXXXXXX 7
- Diamond : XXXXXX5 XXXXXXXX 4
Is that normal ? Why are they changing the number ?

Airlines do not change your number when you change status.
Those two numbers will always change when you change status - presumably you have been Plat for so long that you dont recall the number changing from when/if you were a lower status than Plat.
When have an ALL membership (not Accor Plus), Where you have a "4" for Plat - i believe a 1 denotes Classic, 2 is Silver, 3 is Gold, 4 is Platinum and 5 is Diamond (I think).
when you have an Accor Plus membership, I believe it is 1 is Diamond, 2 Limitless, 4 Silver, 5 Gold, 6 Platinum
The first 6 X's identify your membership type (ALL, Accor Plus, Ibis Business etc).
The 8 X's you marked is your unique membership number. No member will have the same 8 numbers/letters here.
I actually do not know what the final digit represents.