1. A method of provisioning a subscriber in a provisioning system where a faulty registration is received for a mobile communications device of the subscriber, wherein the faulty registration comprises a field with missing identification information, the method comprising the steps of: assigning the faulty registration a false billing identifier; assigning a special active status to the subscriber, wherein the special active status is only assigned to subscribers with false billing identifiers; and logging activity associated with the faulty registration for use in billing the subscriber if the missing identification information identifying the subscriber is later determined.