Patent ID: 7796009

Claim:
A system for assuring quality of a transaction, the system comprising: an inlet/outlet controller comprising a transaction-identifier generating unit that generates, when a port of a container is opened, a transaction identifier and registers the transaction identifier to a storage unit, and an identifier transmitting unit that transmits the transaction identifier to a first on-site device; a server comprising a registration processing unit that receives the transaction identifier from the first on-site device and updates a transaction information database based on the transaction identifier; a second on-site device comprising an identifier receiving unit that receives, from the inlet/outlet controller, a transaction identifier stored in the storage unit, a transaction-information inquiring unit that inquires of the server whether the transaction identifier received by the identifier receiving unit has been registered to the transaction information database, and a transaction-availability determining unit that receives a response indicating whether the transaction identifier received by the identifier receiving unit has been registered to the transaction information database and sends a warning when the transaction identifier received by the identifier receiving unit has not been registered.