Fuente: Wipo "digitalization" In order to realize work load reduction and cost reduction, there is provided a system that includes a bill data creating unit (5) for creating bill creation data composed of character strings, a digital bill creating unit (6) for creating a digital bill using the bill creation data, a digital signature unit (7) for creating digital signature data by performing digital signature processing on the created digital bill, and a bill electronic delivery unit (9) for combining the digital bill and the digital signature data and electronically delivering them. Among these construction elements, the digital bill creating unit (6) and the digital signature unit (7) are provided in a server (20) and the bill creation processing and the digital signature processing are automatically performed by the server (20) without the requirement for operations from an operator.