With logical least one first signal source communicating with configured central unit (100) so as to provide a true alert signal (120) and (110 a-110j) when a predetermined condition is satisfied alarm system. Signal source 110, for example may comprise a transponder, such as RFID chip. An RFID chip, a list of confidential, including the relationship between the name of the person to be identified, may be stored in computer 160. Verification unit (200) is connected to an independent source (210a-210j), logically configured to provide a true validation signal (220) when a predetermined condition is satisfied. Signal source (210), for example, heart rate, can be equipped with means for measuring respiration, or the biological functions such as eye movement. Verification unit (200) can be carried by a safety manager. In such a case, the safety manager can confirm or reject the alert warning from the central unit (100) manually. Alert signal (120) is true, and verification signal (220) only if it is true, the alarm signal (320) is started. Alarm signal may be a call to the receiving unit (400) in the relief or security center.