Google Adsense: Report Invalid clicks from your site

If you have Google Adsense account and suspected invalid attack to your site, you may actually contact Google to reduce the risk to suspended your account.

Such attack normally known as click bombing and the attacker targeted website which come with Google Adsense.

To report to Google, simply fill in the form as below,
https://support.google.com/adsense/bin/request.py?&contact_type=invalid_clicks_contact