This autographed Riddell Speed mini helmet has been personally hand-signed by Marquez Valdes-Scantling of the Kansas City Chiefs. This autograph is certified by Beckett Authentication Services (BAS) Witness Certification. That means that a Beckett representative was present when this item was signed. It comes with the numbered authentication hologram with a QR code that verifies the authentication on the Beckett website. it is also certified by Players Ink. It comes with the numbered authentication hologram with a QR code that verifies the authentication on the Players Ink website. Scan the QR code with your mobile phone to verify the authenticity.