This item has been hand signed by former new york yankees closer & 2019 baseball hall of fame inductee mariano rivera. the signature on this item has been authenticated by steiner sports and features a uniquely numbered tamper proof hologram which can be verified in our online database. this process ensures your item is authentic and prevents duplication and fraud.this is a 10" x 20" photographed framed to overall dimensions of 14" x 24"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: steiner sports authenticated history of item: mariano rivera has signed this item in the presence of a representative from steiner sports. 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!