This Birdhouse Second Life 8.0 skateboard deck is autographed by Tony Hawk. Hawk's signature was witnessed by an Upper Deck representative as part of UDA's 5-step authentication process.Officially licensedThis product is guaranteed authentic and includes an Upper Deck Authenticated Certificate of Authenticity and an accompanying tamper-evident Hologram.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.