Abstract: System and method for managing purchase data of a credit card account associated with a vehicle through the use of a management system. The management system downloads data regarding a vehicle from vehicle master system, and data regarding the U.S. Postal Service organizational hierarchy structure from financial data mart system. The management system receives transaction data from a credit card system, summarizes the data by vehicle, driver, product group and supplier at eight (8) summary levels of organizational structure, analyzes the transaction data for instances of possible fraudulent use of the credit card, and creates exception records to indicate possibility of fraud. On behalf of the credit card provider, the management system creates an invoice and a control report, and sends the invoice to the financial department for payment. The management system produces spreadsheets and reports used for quarterly or annual filing with States to recoup exempt tax not taken off at the pump.