US Patent 9183551 Location-based payer charging system

A method for charging a payer includes detecting a payer device, which is associated with a payer account, entering an event area. The payer device is then associated with an event invoice in a database. When the payer device is determined to have been involved in at least one payer charging event while being located in the event area, a charge is associated with the event invoice in the database for each payer charging event the payer device has been involved in. When the payer device is detected leaving the event area, a payment is charged to the payer account for the event invoice.