I got an email from nobody@digitalpoint.com saying: This is to let you know that during a revalidation process of your site, co-op ad network ads were not found on the following page: The url it mentions no longer exists. Any suggestions?
Then you will have to remove page from Google directory http://www.google.com/remove.html or put up a page with that name. Shannon
The co-op validates your site everyday to make sure you are still displaying your ads, if it finds your ads are no longer being displayed it will take your ads out of the network until you revalidate successfully. It randomly checks one of your site pages which are indexed in Google, regardless of whether the page still exists or not.