To enable support for Formidable Pro, first go to Affiliates → Settings → Integrations and check the box that says Formidable Pro.
Second, go to the Settings page for the form you wish to track conversions on and click the AffiliateWP tab. Here, select the fields for the referral description, the amount the referral should be calculated by to enable affiliate tracking, and finally, select the Referral Type from the list (Sale, Opt-In, or Lead).
Once those options are enabled, AffiliateWP will automatically generate a referral each time the customer is referred by an affiliate and submits a form.
Note: Referrals created with Formidable Pro will have a status of Pending, unless a payment gateway add-on accepts payments on the form submission.