Abstract: Attendance of subjects within a monitored area includes periodic steps of: (a) transmitting by wireless transmitters (23) of identification modules (2), assigned and attachable to subjects (7), notification messages (Nm) with identification data; (b) receiving by a wireless base receiver (3) the notification messages (Nm) transmitted by the transmitters (23) and a wireless base transmitter (11) transmitting receipt confirmation messages (Cm); (c) determining attendance statuses (As) based on the received notification messages (Nm); wherein (a) additionally includes transmitting individual motion signals (Ims) representing a motion of a given identification module (2), and (c) additionally includes determining attendance status (As) of an “absent” value in a case of indicating for a predetermined time period by the individual motion signal (Ims) for a motionless status of an identification module (2) assigned to the given subject (7).

Abstract: Attendance of subjects within a monitored area includes periodic steps of: (a) transmitting by a wireless transmitter (23) of at least one identification module (2), assigned and attachable to a given subject (7), a notification message (Nm) with identification data; (b) receiving by a wireless base receiver (3) notification messages (Nm) transmitted by the transmitters (23); (c) determining attendance statuses (As) on the basis of the received notification messages (Nm); wherein step (a) additionally includes transmitting individual motion signals (Ims) representing a motion of a given identification module (2), and step (c) additionally includes determining attendance status (As) of an “absent” value in a case of indicating for a predetermined time period by the individual motion signal (Ims) for a motionless status of an identification module (2) assigned to the given subject (7). Also a system is shown for an automatic monitoring of attendance of subjects within a predetermined monitored area.