Service provisioning method

摘要

The method involves providing and issuing a portable authorization unit with electronically detectable authorization information at the beginning of the provision of a payment. The authorization information is read in a range of cash for settlement of payment transactions from the authorization unit. The information is converted into a format that is processed for a point of sale system (22) and is provided for reading in the point of sale system for further processing. Released information is produced by cash envoy data at an acknowledgement printer. An independent claim is also included for a device for changing authorization information of an authorization unit.