Alonzo Mourning Autographed Miami Signed Basketball 16x20 Photo PSA DNA COA Hall of Famer Alonzo Mourning has autographed this 16x20 photo. Autograph is authenticated by PSA/DNA, the world's leading authenticator of sports autographs. Comes with their unique sticker # fixed to the item and verified on their website. Also, comes with their certificate of authenticity with same matching #.