This is a true Donald Trump signature. Note the shape of the "D;" the discernible "a" and "l" in "Donald;" and how the vertical motion in "Trump" is at an angle instead of straight up and down. http://a.abcnews.go.com/images/Business/ht_donald_trump_...

I would say no on this one. I have both TTM and in-person autographs from him and both look like "J ^________."

Absolutely authentic. I have a signed book that I received as a gift from someone affiliated with him and it too has the full signature. Authentic Justin Bieber signatures are his full name; those done by his staff are the "JB" signature.

Congratulations!