I doubt he knows the ID by heart. Its like sixteen characters.
It's kinda like memorizing your Windows activation key. You wont remember it unless you memorize it or use it a lot.
If he doesn't live close to you anymore then there isn't much you can do except call him up and explain the situation.
You could tell him that it is your key and that it is your money and therefore your property, though I doubt he would care unless he is a good/nice friend.
1. I remember my whole Activation key. I saw him type it in without any help.
2. I don't have his phone number, he wont even give it to me anyways. (I cant get in contact with him in any way.
3. I did tell him that... all he said was "no" (Talked to him on IRC)
(Talked to him on IRC)How?
My name on Blockland is Trògtor, so it shows up as "Trgtor" on IRC for him, BUT I used a custom IRC User-Name so for me it shows up as "Trogtor"