Peter signed his name and wrote "Chewbacca" underneath his name. It should be noted that Mark's image is very clear but the photo blurs out a bit for the background of Carrie, Peter and Harrison (with his back turned) in the photo. They are guaranteed to pass any reputable third party authencation such as Beckett, PSA or JSA.The item "Star Wars A New Hope Mark Hamill with Message & Peter Mayhew Autographed Photo" is in sale since Thursday, March 7, 2019. This item is in the category "Entertainment Memorabilia\Autographs-Original\Movies\Photographs". The seller is "lasslinda" and is located in Carlsbad, California. This item can be shipped worldwide.