This piece features an authentic signature of Boxing legend Muhammad Ali. We have professionally framed it floating over a full size poster featuring Ali standing over Sonny Liston. It is accompanied by a Certificate of Authenticity from Palm Beach Autographs and JSA. A tamper-evident hologram will be affixed to the item. Signed items are guaranteed to pass any third-party authentication with 100% Money Back Guarantee. Each signature is witnessed by a member of our staff or comes out of a private signing.