What U.S. retail stores do NOT use Certegy?

While specific information about all U.S. retail stores that do not use Certegy is not readily available, many smaller retailers and independent shops often opt for different payment processing systems. Major retailers like Walmart, Target, and many department stores typically utilize various payment verification services, including Certegy. However, some regional chains and local businesses may choose alternatives based on their specific needs and preferences. It's best to check with individual retailers for their payment processing methods.