For some unlucky reasons (mostly due to the invalid click activity), your adsense account would be disabled by Google. Although Google strongly emphasize that they have sophisticated tracking programs, as well as human monitoring, to track for the invalid clicks, they often make mistakes and charge some innocent Adsense publishers, and take away their rights of participating this program in the rest of his or her life time. I must admit that this is definitely unfair.
If you receive that email, I am sure you are very frustrated. The first thing to do is to read carefully on why Google charge you and take away your Adsense account. You should also think twice on whether you have committed those issues. Then, prepare all the evidence that in favor to you and make an appeal to Google. Then, pray that Google will give you back the Adsense account, and most importantly, the earning accumulated inside. However, chances (though really low) are there that you may get back your adsense account. Fill in the form below for making such appeal:
First choose a new computer to start a new blog/ site, and then apply it with Google Adsense. Make sure that the IP address is completely different with those you have used to login your Google and Adsense accounts. I believe that Google will approve you if your site is clean and have enough content. Then, use that computer only (or other new computers with new and different IPs) to login your Adsense account. Never login your adsense account with the one you previously used, because that will let Google know this new Adsense account has correlation with the previous invalid click activity and disable your account.
Hope it helps, and earn more from Adsense program!