This is a 3x5 Basketball Cut Signature Authentic Signed that has been Personally Signed & Autographed by Deron Williams of the Dallas Mavericks. This item is 100% Authentc , it comes slabbed and authenticated by Beckett Authentication Services. You can also see the authentication on the Beckett Authentication Services website, beckett-authentication.com. We offers a 100% Lifetime Guarantee on all Autographed & Signed Deron Williams memorabilia.