PAYSSION Payment Gateway Module for WHMCS
- Download and fill in your API Key and Secret Key in the file
- Copy over modules folders to your WHMCS root.
- Login to WHMCS as Administrator
- Go to Setup > Payments > Payment Gateways in the main menu
- Select "All payment gateways" tab and you can find all Payssion's payment methods ending with "via Payssion".
- Click the payment method you'd like to activate, and change it if needed.
- Save changes.