A tag for attachment to a circuit breaker is formed from a sheet of plastic material having first and second notches, one or more catches corresponding to one or more apertures, an electronic security device and a plurality of parallel grooves extending between the edges to form a plurality of sections. The tag is assembled by folding the sheet of plastic material so that the end sections overlap and the apertures fixedly receive the catches to secure the tag in a closed position. The notches in the first and second top sections form an opening, which is adapted for receiving the circuit breaker switch.