I already have an adsense account, but I was certainly worried because I heard that adsense must approve my site before I paste code into it. Is this true?, I mean, I already have several sites running adsense, do I have to ask for their authorization each time I set up a new site?
No, you don't. You just have to make sure all the websites were you put your Adsense code are TOS compliant. You should read the Adsense TOS and the Program Policies.
Yes, You don't need it just paste the code in your websites must be match with Google AdSense TOS. - Imran
You're welcome! I'm a very helpful person, LOL! Seriously, this forum is awesome. I like it so much it's becoming addictive!