This Riddell Flash Alternate series Mini Helmet has been personally hand-signed by SB XXI MVP Phil Simms. This item was signed in the presence of and witnessed by a representative of both Fanatics and James Spence Authentication. It comes with an individually numbered, tamper evident sticker from both companies which can be reviewed online to ensure authenticity. This process helps to ensure that the product purchased is authentic and eliminates any possibility of duplication or fraud.