This 8x10 photo has been personally hand signed by Cheech Marin and Tommy Chong on August 12; 2008 under the direct supervision of American Icon Autographs. This item was hand signed by Cheech and Chong 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.