This post is also available in: nlNederlands (Dutch)

You’ve probably seen them before, the urls with in them. Probably you wondered what they were, and were a bit suspicious. One place where they show up regularly are your Google Adsense stats, in the list of sites accompanied by this warning:

Your ads have recently appeared on websites you haven't authorized. To avoid lost revenue, make sure to authorize any sites where you display ads by visiting your account settings.

adsense unauthorized sites warning

Now, what is that? What to do with those unauthorised sites?

Well, every page that is crawled by the Google spider is cached and serves as a back-up in case the original page is unavailable. If you click on the “Cached” link, you will see
the web page as it looked when Google’s spider indexed it. The cached content is the content Google uses to see if the page is relevant for your search.

Another one that comes up regularly is This is not coming from cached pages, but, yes, you guessed it right, from pages translated through Google’s translation pages.

Google used to serve these pages straight from an ip-address, but, most probably because of ease-of-maintenance considerations, they now changed this to a domainname:
So, the most important question: can you trust these sites? Yes you can!