Certificate of Authenticity: This item has been dual certified AUTHENTIC by Brett Favre personally using his tamperproof authentication sticker found in the bottom right corner of the piece. Favre's agent placed this hologram on this piece when he signed the item so people would not be fooled by fake authentication and personally guaranteed by the NFL Legend himself, the best authentication you can get. In addition, this piece has been authenticated by one of the most reputable and recognized authenticators in the business today, JAMES SPENCE AUTHENTICATION (JSA). This item comes with a JSA numbered tamper-proof authentication sticker and COA card that can be reviewed on their website 24/7/365 to guarantee its authenticity.