Do it once you have your new card. Don’t wait till they open it. I had 2 packets. For 1, I communicated and it was taken care of when they opened. The second one I had to follow up with the call Center.Thanks a lot!
When should I do it though? when they open the envelop dates in three weeks or now?
I would suggest send the new card details as soon as you have it. They will acknowledge the email in 2 days.