Yesterday I got an alert in my Adsense account with the message that “you’ve rejected ad requests, which will result in lost revenue”, it scares any one- it turns out that some other Adsense publishers also getting this alert according to Google Adsense known issues page, this page confirms no action is required on our part as Google is fixing them, this alert will likely to disappear in a couple of days with the fix in place, if not that means your ad unit(s) may have experiencing with rejected ad requests for which you can find the fix in Adsense Help Center, you may need to sign into your Adsense account to access it.
When you click on see details link in the alert you’ll be shown below information
“Rejected ad requests
The errors listed below will result in blank ads being displayed on affected pages starting August 15, 2012. Please make sure that you fix these errors before then.
The following ad units have made ad requests with incorrect site information. This occurs when the URL of the server from which the ad unit has been served differs from the URL of the actual page where the ad will be displayed. Learn how to fix these errors.
Rejected requests
Ad unit Incorrect sites “
Why some publishers are getting rejected ad requests alerts?
Some accounts incorrectly notified about rejected ad requests
Details: We recently changed the way our system surfaces alerts related to rejected ad requests. This has resulted in some publishers seeing an alert in their AdSense accounts about needing to fix rejected ad requests, though no action is required on their part.
We’re quickly working to fix this so that only publishers who need to take action will see the alert. We hope to have this resolved in the next couple of days, and we’ll update the known issues page when the update is live. If you are concerned about this alert, please check your account after that, and if you still see the notice, follow the instructions in the Help Center to resolve the issue. Note that the vast majority (over 90%) of publishers now seeing this notification will not see it after the fix. If the instructions in the Help Center don’t seem to apply to you, you are probably one of the publishers who should not be seeing this alert notification.Thank you for your patience as we resolve this issue with our notification system.
Currently “learn how to fix these errors” link in alert info in my account is taking back to Adsense page instead of help page, so we’re assuming Google removed the help link which I don’t need to take action, may be the case with other affected Adsense publishers also.
Wait for couple of day for Google to fix this, we’ll update this post once Google removed this alert or updates info on known issues page.