After our recent update, in October 2015, we made it mandatory to update your billing information before launching any email verification jobs.
Therefore, even if you have been using our services for a while now, you will receive this message to update your billing information. Once you finish doing this, it should let you launch email verification jobs as normal.
1) Login to your account. If you don't have one, please sign up for an account.
2) Click on "My Account" on top right corner where your gravatar or profile picture is.
3) Click on "Personal" tab and update your information there.
4) Once you fill out all required fields...click on "Save Changes" button.
5) Done! You are now ready to start launching jobs again.
Stuck still? Learn how to update your personal details.