How to the Status of QSL Cards at this bureau
The Carolina DX Association runs an excellent utility that enables Hams to check the status of QSL cards, SASEs, and Account Funds on file with this Bureau. This information is provided by some, but not all of our letter managers. It also provides the email addresses for you to direct your questions directly to your supporting letter manager.
https://www.cdxa.org/w4qsl-bureau/