This NY Yankees NFL Style Riddell Mini Helmet has been personally hand-signed by Jorge Posada. This unique product is an Exclusive of Coach's Collectibles. This item was signed in the presence of and witnessed by a representative of James Spence Authentication. It comes with an individually numbered, tamper evident sticker from JSA 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.