For added security we mark each solar panel with an etch-marked elephant logo on the front glass. This cannot be removed and clearly shows that it is an Zeat Thief-Proof solar panel. In addition each panel is punch marked on the frame with an individual number.A certificate showing this number is given to the house owner and we record this number on a database. A Read-Only copy is given to police and security firms. Each panel is known and can be traced. This makes a stolen Elephant panel worthless.If the owner moves or sells his home we must be informed in writing in order that we can issue a new certificate.If ever you are offered a second hand panel with this logo or number defaced, it is stolen. PLEASE INFORM THE POLICE.