With regards to Devconnect '22 shop on Pretix:
Order was originally placed with email 1, but at some point email 1 was changed to email 2.
After issuing emails with {attestation_link} placeholder, MagicLink contains email 1 in the link.
This can be an issue if an employee lost their job & access to their email 1 after placing an order.
Attestation.jar should update with new email.