The described principles provide a method and system for enabling a telematic operator to determine that an outbound call has been placed to a non-telematic mobile directory number by the telematic operator in error. In one aspect, the invention allows the telematic operator to create an identification of all non-telematic MDN's stored by the wireless carrier which the telematic operator continues to believe are active and are associated with a pending transaction. Improved synchronization of records between the wireless carrier and telematic operator is provided to minimize incidents involving transactional differences between MDN values stored by the wireless carrier and telematic operator when an assigned MDN is processed in error between the two entities. The use of unique modem telephone numbers by the telematic operator allows identification of the affected MDN (by the telematic operator) while providing the customer data privacy needed for the wireless carrier.