This is a Miami Dolphins White Speed Mini Helmet that has been hand signed by Zach Thomas. This item was inscribed "HOF 2023." This item has been witnessed and certified authentic by Beckett Authentication (BAS) and comes with their tamper-proof witness sticker. Beckett Authentication has recently changed their physical certificate card policy where they no longer match their tamper-proof sticker with a physical certificate. A certificate can be printed on Beckett's website for the matching authentication number.