Accept one-time credit card or eCheck payments directly on your site. Give your customers the option to pay in your site with this Authorize.net WordPress plugin for Formidable Forms.
The Authorize.net Payment Gateway plugin allows you to keep the customer on your site for the checkout process, giving you maximum control over checkout. SSL is required for PCI compliance due to the direct checkout to ensure that your customers' credit card information is secure. If you don't have SSL on your site, ask your host about free SSL through LetsEncrypt.