As we announced last month, we are now requiring all merchants to have both verified and claimed their URLs in order to submit a product feed to Google. If you haven’t yet completed this process, we urge you to do so as soon as possible. If you have, please make sure not to remove the file or metatag you added to your website as part of the verification process. If that file is removed, you will lose your “verified” status and will need to go through the verification and claiming process again.
Posted by Sagar Kamdar, Product Manager, Google Product Search