To surely provide commodities in commercial transactions.

Transaction articles agreed between the commodity seller and commodity purchaser of the commercial transaction are stored in a table 3a, a table 3b, a table 3c and a table 3d. The reception date of the deposit of fulfillment from the commodity seller, the delivery date of the commodity to a commodity transporter and a commodity check result indicating whether or not the delivered commodity satisfies the transaction articles are recorded. When the delivered commodity does not satisfy the transaction articles, the deposit determined as the transaction article is confiscated.