It is authenticated by JSA and you will also receive the COA card you see in the photos. There are literally THREE Mickey Rourke signed photos from Sin City in existence. One has those horrible white borders on the top and bottom and the other one has a horrible size of 12x18. Mine isn't the only normal photo out there but it's also the best looking as well. I absolutely loved Mickey Rourke's performance in this movie and I loved the Marv character even more.
Considering this is by far the best option out there, but it before someone else does because Mr. Rourke signs very few autographs so once it sells, that'll be it.