If you dont have provenance you are wasting your time purchasing an autograph. This is a rare example of an autograph that is unquestionaly authentic. I should know because Chris signed it for me!
Christopher Eugene "Chris" O'Donnell (born June 26, 1970) is an American actor. He played Dick Grayson/Robin in Batman Forever and Batman & Robin, Charlie Simms in Scent of a Woman, Finn Dandridge in Grey's Anatomy, Peter Garrett in Vertical Limit, and Jack McAuliffe in The Company. O'Donnell currently stars as NCIS Special Agent G. Callen on the CBS crime drama television series NCIS: Los Angeles, a spin-off of NCIS.