This Indoor/Outdoor NBA Basketball was Signed by Isiah Thomas on August 30; 2008 under the direct supervision of American Icon Autographs. This item was hand signed by Isiah Thomas and comes with an individually numbered; tamper evident sticker from the industries leading autograph authenticator PSA/DNA and comes with a lifetime guarantee. 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