In accordance with our policy of sunsetting older versions of the AdWords API, we will turn off access to version 12 of the API on Monday, February 23, 2009. Version 13 of the API has been available for over four months now, and supports a number of new features. We hope that you've already taken the opportunity to upgrade your code.
The latest versions of the publicly available official Google client libraries all support version 13 of the API, so if you're using one of those, please check the relevant README file for information on how to switch from version 12 to 13.
As always, if you have any questions about the AdWords API or upgrading to our latest versions, you can check out our Frequently Asked Questions or ask them in our developer forum.
-- AdWords API Team
