Surveillance device for articles and or persons.

It is a device for monitoring of goods and / or persons described which includes an RF transmitter (10) and a security tag (15) having a housing for receiving an electronic circuit. The electronic circuit includes a battery and an alarm device (30). An alarm is triggered if an electrically conductive fuse element (14) for securing the safety seal (15) is severed on the subject or to the person or if a the RF transmitter (10) generated external RF field has a particular state , Here, the RF transmitter (10) is formed with means (11) for coding the RF signal, while in the elec tronic circuit of the security tag (15), a decoder (20) is provided, which in the presence of a defined information content of the coded HF signal an alarm signal to the alarm device (30) for triggering an alarm emits.