Follow these steps to obtain a tracking URL for an ad:
Click the “AdChoices” logo in the ad. If the ad is coming from one of our networks, you'll be routed to a Google Support page. If not, then the creative is not coming from Google.
From the Google Support page, copy and paste the entire URL from the address bar (omnibox).
Send this URL over with your consult and our internal AdSense team will be able to identify the ad.