New Google adsense rules

All Adsense publishers are now required to have a Privacy Policy on their sites.

You probably ignored the message, like I did, but it is an important change.

You must have and abide by an appropriate privacy policy that clearly discloses that third parties may be placing and reading cookies on your users’ browser, or using web beacons to collect information, in the course of ads being served on your website. Your privacy policy should also include information about user options for cookie management.
Here's a Privacy Policy Template that you could use.

Also, here's a Privacy Policy Generator, just for this purpose. Nice!