Tamper evident labels are made from materials designed to show proof of tampering if removal of the label is attempted. Two main types of tamper evident material are available; those that fragment into small pieces when removal is attempted, and those that reveal a pattern or word (such as void) when removed. Both these tamper materials make it obvious if an attempt is made to remove the label and then replace it. Both these label types can include company logo's, barcodes and serial numbers.