MATT DAMON signed this 12x18 THE MARTIAN PHOTO very nicely in blue sharpie.  It does have a couple of dings on the corners but will matt out fine.  The autograph is authenticated by JSA, one of the elite authenticating companies in sports.  Comes with a COA with a matching hologram.  The cert number is U13617.   Please check my feedback and bid with confidence.  I have been obtaining AUTOGRAPHS IN PERSON for over 40 years at team hotels, games, spring training, golf events, and more. Please check my other items.  Thank you.