Patent ID: 7529699

Claim:
An accounting system comprising a bill-issuing device and a bill-receiving device, the bill-issuing device being connected to a database and including: a first receiving unit operable to sequentially receive input of (i) billing data for appropriation in consolidated accounting and (ii) billing data not for appropriation in consolidated accounting; an entry unit operable to enter the received billing data in the database; an extraction unit operable to extract billing data not for appropriation from the received billing data; an output unit operable to output the extracted billing data to the bill-receiving device; and a receipt notification receiving unit operable to receive a receipt notification that includes an identifier of the billing data not for appropriation received by the bill-receiving device and a message indicating the receipt of the billing data not for appropriation by the bill-receiving device, the receipt notification being outputted from the bill-receiving device to the bill-issuing device if the bill-receiving device has received the billing data not for appropriation; the bill-receiving device including: a second receiving unit operable to receive the billing data outputted from the bill-issuing device; and a notification unit operable, upon receipt of the billing data not for appropriation by the second receiving unit, to notify the bill-issuing device of the receipt of the billing data not for appropriation by out-putting, to the bill-issuing device, the receipt notification on the billing data not for appropriation, wherein the receipt notification receiving unit, upon receipt of the receipt notification outputted from the notification unit, adds a receipt notification reception identifier to, among the plurality of the billing data entered in the database, the billing data indicated by the identifier included in the received receipt notification, the receipt notification reception identifier indicating the receipt of the receipt notification, and; the bill-issuing device further including: an exclusion unit operable to exclude, the exclusion unit excludes, among the plurality of the billing data entered in the database, the billing data to which the receipt notification reception identifier is added.