White-label processing refers to the process of one company providing its services or products to another company who then rebrands and sells them under their own brand name. In the context of payment processing, a white-label solution is a payment gateway or processing service that can be rebranded and customized to meet the specific needs of another company, such as a merchant services provider or an online platform that wants to offer payment processing services to its customers under its own brand name. The white-label provider handles the back-end processing, while the client company retains control over the customer-facing aspects of the service, such as branding and user interface.