If you have lost some mail we can take a look and see if there is anything in our logs - mail lasts for 30 days before being returned to the original sender (where it will also last 30 days there) and from the auction house will be deleted after 30 days. If it was a very long time ago (say 3 months or more) it’s likely we won’t have this in our logs, but if it was recent enough it never hurts to send in a ticket here.