The Royal Bank of Scotland famously issued a Jack Nicklaus 5 pound note a few years ago. Jack was only the 2nd living person to grace a Scottish bank note. Jack Nicklaus considers if one of the greatest honors he ever received. Offered here is one of those bank notes that is autographed by Jack Nicklaus in black Sharpie.
Certificate of Authenticity from James Spence Authentication (JSA)