"Hello,        
After reviewing our records, we've determined that your AdSense account         
poses a risk of generating invalid activity. Because we have a         
responsibility to protect our AdWords advertisers from inflated costs due         
to invalid activity, we've found it necessary to disable your AdSense         
account. Your outstanding balance and Google's share of the revenue will         
both be fully refunded back to the affected advertisers.         
Please understand that we need to take such steps to maintain the         
effectiveness of Google's advertising system, particularly the         
advertiser-publisher relationship. We understand the inconvenience that         
this may cause you, and we thank you in advance for your understanding and         
cooperation.         
If you have any questions or concerns about the actions we've taken, how         
you can appeal this decision, or invalid activity in general, you can find         
more information by visiting         
http://www.google.com/adsense/support/bin/answer.py?answer=57153.         
Sincerely,         
The Google AdSense Team