Seamless Integration Automatically capture credit card payments with Authorize.Net when a form is submitted. Product and Services Setup and sell simple products or services in just minutes with one time credit card payments. Recurring Payments Setup and configure Authorize.Net Automated Recurring Billing subscriptions. WordPress Posts Configure your form to both create a post and accept a payment. The post is only created if the payment is approved. User Registration Configure your form so that users created with the User Registration Add-On are only created after payment is approved. System Requirements The Gravity Forms Authorize.Net Add-On requires Gravity Forms v1.6.2+, WordPress v3.3+ and a valid SSL Certificate installed and configured on your WordPress site.