Lock Persons The menu item Lock Persons allows you to block and unblock badges en masse based on certain criteria. Locking persons Select a criterion from the list field (e.g. badge number or PDC group). Select a value from the Criteria Values drop-down list. (Optional) Enter a reason for the ban in the field Reason for the lock . Press Lock to lock the person(s). Unlocking persons Follow steps 1 and 2 above and press Unlock .