WHMCS Payments Payment Gateway Tutorials Reconfigure Stripe™, Stripe ACH, or Stripe SEPA to use a restricted API key instead of a secret key. Stripe will require restricted keys beginning in October 2024. Configure WHMCS to allow users to delete client payment details for their saved credit and debit cards (their stored pay methods). Activate a payment gateway module to begin receiving and processing payments from your customers. Each module has different capabilities. WHMCS can automatically charge your customers for renewals, removing the need to run credit card charges for renewed services manually. Configure the PayPal Payments module. PayPal Payments processes payments, stores client PayPal® details, and enables faster checkout. Duplicate the open-source Bank Transfer and Mail In Payment payment gateway modules and use them for creating your own custom modules. Migrate from one payment gateway to another by activating a new module, deactivating the old module, and performing configuration steps.