Abstract: A method and apparatus for bill verification in a communication and computing environment is disclosed. The apparatus includes a user device (12, 14, 16) and a bill verification device (26). The user device independently generates user data records (36) that describe usage units of a service and transmits (42) the user data records to a bill verification device (26). The bill verification device collects bill calculation information from a user device, from a service provider device (18) and a service provider billing system and independently calculates and generates a bill with embedded inter-bill difference indicators. The bill verification device is further used as a post-billing usage control mechanism.