| 摘要 |
A notification apparatus transmits notification-related information (a notification message and a notification target(s)) to a notification-related information guarantee apparatus, and the notification-related information guarantee apparatus guarantees that the notification-related information has been received from nothing other than the notification apparatus. After the notification apparatus transmits the notification-related information guaranteed authentic to an intermediary notification apparatus, the intermediary notification apparatus also confirms whether the notification-related information has been guaranteed authentic by the notification-related information guarantee apparatus. If the notification-related information is confirmed to have been guaranteed authentic, then, the intermediary notification apparatus acquires from multiple owner-information management apparatuses the owner information (an owner name(s) and contact information) that corresponds to the notification target(s) (one or more item IDs). Thereafter, the intermediary notification apparatus notifies the notification target(s) of the notification message with the use of the owner information and transmits the notification result to the notification apparatus.
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