Abstract: A portable terminal, which is connected to a server, includes: a communication section to send and receive data to and from the server; a time obtaining section to obtain current time; a location obtaining section to obtain a current location of the portable terminal; an input section to input receipt confirmation information indicating that a recipient of a shipment has received the shipment; and a control section to cause a digital signature to be attached to electronic form data, and to cause the communication section to send the electronic form data with the digital signature to the server. The electronic form data includes the receipt confirmation information input through the input section when the shipment is received; the current time obtained by the time obtaining section when the shipment is received; and the current location obtained by the location obtaining section when the shipment is received.