This is him signing neatly, which is pretty rare. In most examples the d in de Niro usually isn't as close together with his first name. Honestly, this has very good characteristics of an authentic de niro but I'm far used to seeing his sloppier in person signatures. Most likely real in my opinion, but id get more opinions if I were you
This could be real as i dont know what his unmessy signatures look like, but to me off the bat, it looks like what people are getting back TTM (secretarial).
J. Try to ask the seller where he or she got the item from. If it's ttm stay away. I believe goldenage autographs has a de niro for only $75. Id go there for a de niro since it's guaranteed for life ;too risky with this photograph
Very real. I got him last year where he personalized 3 items for me on a movie set and took his time. Even added the same GOOD LUCK inscription like this photo as well.