Method for automatically analyzing customer's bill, such as cell phone bill, received in electronic format for errors and utilization against company's published plan by third-party on third-party's website for customer. The company's published plan is previously stored on third-party's website. Third-party advises customer of results, in real-time, and provides blind feedback to billing company by type error and utilization. Results and feedback are specific to each customer and billing company, and also provides security for both. Promotional materials are provided to customer for revenue to third-party.