Alright that's beautiful, thank you.

Q1 If you include a written request with the players name and address to the player c/o ajax it should reach him.
Q2: If there is a club address on here then it should be ok to use
Q3: Authenticity can be pot luck. You can ask once you get the autograph on here if others think it's genuine, another way is to see if it is a pre printed auto or auto-pen, you should be able to tell either.

Long story short my girlfriend's birthday is in 4 months. Her favourite footballer is Gregory Van Der Wiel of Ajax Amsterdam, Im going to request an autograph but I have 3 questions:

1. Do I write a written request along with the picture saying which player I want to sign the picture?

2. Do I use the address on the left side of the Ajax page on this site?

3. How will I know if it's authentic?