To provide a method capable of receiving a delivery article or postal matter such as an article or documents like a private letter even if a person her/himself is absent, and reducing a cost for redelivering the delivery article and the postal matter in the absence of the person.

In this operation method for a simplified post-office box system, a private post-office box is installed in a convenient place such as a railroad station or a convenience store, and arrival of a dispatch article is informed by an electronic mail or the like when the dispatch article arrives. Thereby, the dispatch article can be timely received at any time independently of the absence.