A method and system for handling a faulty registration for a subscriber with a mobile communication device in a communications network. A faulty registration comprises a registration missing identification information or having a field that is missing an identifier or other form of information. The method and system comprise selecting another field or property in the faulty registration, which is populated with an identifier or identification information, and searching the selected field or property in a list of registrations for matching identification information. Associating the faulty registration with an existing registration for a subscriber based on matching the identification information. According to another aspect, the system and method comprise generating a new registration for the customer with the faulty registration if a matching registration is not located or search criteria are not satisfied. According to another aspect, the system and method comprise creating a record associated with the faulty registration.