Our Converge Virtual Merchant tokenization gateway module allows a merchant to support all of their recurring and one time invoice payment. With this module we do not store credit card details locally in WHMCS database. The risk of data theft is eliminated. Here is how it works : User enters their credit card details on your website for the very first time. While making payment a request is sent through secure HTTPS method and token is generated.
https://whmcsglobalservices.co....m/virtual-merchant-c