This kansas city chiefs speed authentic riddell helmet has been personally hand-signed by patrick mahomes. it is officially licensed by the national football league and comes with an individually numbered, tamper-evident hologram from fanatics authentic. to ensure authenticity, the hologram can be reviewed online. this process helps to ensure that the product purchased is authentic and eliminates any possibility of duplication or fraud.the autograph includes an official fanatics hologram and matching coa for authenticity purposes.comes with a tamper-evident hologram from fanatics authenticatedofficially licensed by the nfl money back guarantee! if for any reason you are not completely satisfied with the quality or authenticity of your purchase, we will gladly give you a full refund or exchange, whichever you prefer up to 30 days after purchase. please feel free to e-mail us with any questions. good luck bidding!!! authenticator pre-certified authenticator: fanatics authenticated history of item: patrick mahomes has signed this item in the presence of a representative from fanatics. describe how you came to possess this item: super sports center is a fully authorized dealer for upper deck authenticated as well as mounted memories and steiner sports. other information about you and / or the item: super sports center strives to deliver the most authentic in sports memorabilia from trusted companies like mounted memories, steiner sports and upper deck authenticated. if it exists, we can find it for you!