Blacklist editor is part of Prooduct settings.
![Activation center: SN blacklist editor](/sites/default/files/2021-05/acen.program.details.sn_.blacklist_1.png)
- Add serial number to blacklist.
- Check if serial number is already blacklisted.
- Validate serial number.
- Remove serial number from the blacklist.
- Delete specific serial number from blacklist.
Clear all - Delete all blacklisted serial numbers.
Clients can not create new accounts with blacklisted serials. They also can not manage licenses for existing orders with blacklisted serials ("ERROR: Serial number for this order is no longer valid." error message will be displayed in this case).