When you remove the label, you will see the "OPEN VOID" on the label, and the "OPEN VOID" will remain when you want to reposition it, so you can see if it has been removed at a glance. This is a "transition" type that leaves a mark of "OPEN VOID" where it is removed. If you attempt to apply the remove label on the top, the "OPEN VOID" will be displayed to prevent tampering. Security No. for easy management. Remember the number so you can see it was opened even if it was reapplied.