Back in June, we reported that Google ramped up testing the allowed sites AdSense feature.
In short, the Allowed Sites feature, enables publishers to specify which sites can display their ads. This way you do not have to worry about a person stealing your ads with your publisher ID on them, and getting your account banned for "invalid clicks."
The new allowed sites feature now seems to be live for all AdSense publishers. Just login to your account and go to https://www.google.com/adsense/publisher-whitelist-view. Here is a screen capture of what the page looks like:
You can allow domains and even subdomains (i.e. if you have a hosted blog on a blogspot.com domain or something similar). Note, if your ad is found on a domain that is now specified in the allowed sites database, then your ads will still show, but impressions and clicks will not be recorded.
Forum discussion at DigitalPoint Forums.
