CardVerifier is a lightweight COM Component that validates credit card numbers. CardVerifier provides the following services: Validation of credit card numbers. Determination of the type of credit card corresponding to a card number. CardVerifier is has been designed for easy and fast integration into Web Servers.

The component has a high performance, multithreaded design that can handle high volumes of concurrent card verification requests. CardVerifier is completely self-containd and does not require any runtimes or DLLs for its operations. Typical uses of CardVerifier include e-commerce applications and scripts.