This is a White Game Used 2003 Russell Seattle Mariners Jersey that has been hand signed by Bret Boone. This jersey is Size 46. This item has been certified authentic by Beckett Authentication (BAS) and comes with their tamper-proof sticker. Beckett Authentication has recently changed their physical certificate card policy where they no longer match their tamper-proof sticker with a physical certificate. If the item features a Beckett Authenticated QR Code, the item does NOT come with a matching certificate. The tamper-proof sticker holds the value in the authentication process while the certificate does not. A certificate can be printed on Beckett's website for the matching authentication number.