Googles "Allow any site to show ads for my account"

Are there any methods available to track unknown external sites ?

 

In case you allow only particular sites to show your ads the same page will show you a a list of sites that have used your ad code without permission.

That's a great feature, since at least for me it is too easy to forgot to add the sites to the list. 8)

 

Hmm so I can set that to "Only allow certain sites" and google will list somewhere sites that have used my ad code, I could then put those into my allowed list ?