I've just recieved my first ad offer and it's going pretty well. The company wants ads on my new site that hasn't launched yet (is that a good sign?).

My problem is that I'm not 18 yet and so, would there be any problem with them buying from me?

Also, are there any techniques that any of you have picked up from dealing with advertisers? I'm new to advertisers (but I know a bit about ads...just don't have experience yet) and I'm worred that they think of me (sounds like a prom date ) as an un-professional site.

Lastly, how do I go about recieving money from them? Do they send a check and once I get it I prepare everything? How do they know I won't cheat them, how do I know they won't cheat me, etc.?

Thanks in advance for your replies!