This Autographed 11x14 Photo has been Personally Signed by Cheech Marin & Tommy Chong of Nice Dreams. This item is 100% Authentic to include a Certificate of Authenticity (COA) / hologram by Beckett Authentication Services.The authenticity can be verified on Beckett Authentication Services website. Press Pass Collectibles only offers Authentic Autographs by Cheech Marin & Tommy Chong through Signings, In-Person Signings or Private Collections to include a 100% money back Lifetime Authenticity Guarantee.