Google
changes their AdSense policies every once in a while. They say that
it’s done in an attempt to protect the interests of their advertisers.
The last update was on October 20, 2014 but they don’t highlight the
changes unless it’s a critical update.
But you can always subscribe to the official Google AdSense blog or follow AdSense on Google+ to get updates whenever it happens.
This blog post was first published in August 2012 and around that time I received an email from the AdSense team that ad serving has been disabled to one of my website.
What’s
interesting was that it was an obsolete website that I stopped caring
about. But the problem was… I haven’t disabled AdSense on that website
even though it was not in use.