An apparatus supplies power to a communication unit that communicates with an external apparatus, and manages history information for each communication sequence in the communication unit in a mode where power supplied to a control unit is stopped. At that time, the apparatus assigns identification information unique to the communication unit to the history information when the apparatus is in a mode where power supplied to the control unit is stopped, and makes control when power supplied to the control unit is stopped or when the apparatus returns to the mode in which power is supplied to the control unit so that continuity of the history information managed by the control unit is ensured.