Authorize.net has reported that all issues have been resolved.
More information found here: https://status.authorize.net/

Authorize.net has reported a resolution and are continuing to monitor this to ensure it is resolved.
See more here: https://status.authorize.net/

We are receiving multiple calls reporting Authorize.net and credit card authorizing issues. Authorize.net has confirmed an outage on their Twitter account. They are posting updates on their status page as well.
You can read their postings here:
https://twitter.com/authorizenet
https://status.authorize.net/
We apologize for the inconvenience. We will continue to monitor Authorize.net and continue to update this page.