This is a Authentic Signed 8X10 Photo that has been Personally Signed & Autographed by Chevy Chase & John Landis. This item is 100% Authentic to include a Certificate of Authenticity (COA) / hologram by Beckett Authentication Services Witnessed #I49655. This is a BAS Witnessed Program item which means a Beckett Authentication Service representative was present when this item was signed. You can also see the authentication on the Beckett Authentication website and verify the date of the signature. Press Pass Collectibles offers a 100% Lifetime Guarantee on all Autographed & Signed memorabilia. Press Pass Collectibles offers a 100% Lifetime Guarantee on all Autographed & Signed Chevy Chase & John Landis memorabilia.