A user sends data for requesting a service provider to provide predetermined service and signature data created based upon the data to the service provider, the service provider calculates a fee based upon this data and requests a bank to collect the fee from the user. The bank informs the user of the...http://www.google.co.uk/patents/US20020026415?utm_source=gb-gplus-sharePatent US20020026415 - Charging system and charging method
