This Autographed Riddell Rep Mini Helmet has been Personally Signed by Senator Cory Booker of the Stanford Cardinal. This item is 100% Authentic to include a hologram by James Spence Authentication Services. This item will come with an affixed James Spence Authentication Services (JSA) authentication sticker, which includes a scannable QR code to verify authenticity. Please note that JSA no longer provides serial-numbered COA cards, and the attached JSA sticker will serve as the complete authentication for this item. The authenticity can be verified on JSA Hologram website.