This autographed Riddell speed mini helmet has been personally hand-signed by Blake Corum of the Michigan Wolverines.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. Shop our ebay store / Friendly Confines Collectibles for thousands of different autographed jerseys