"Recently, Heartland Payment Systems and RBS WorldPay publicly disclosed unauthorized access to their systems resulting in the compromise of card account information from all major card brands," Visa said in a statement. "Based on compromise event findings, Visa has removed Heartland and RBS WorldPay from its list of PCI DSS compliant service providers … Heartland and RBS WorldPay are actively working on revalidation of PCI DSS compliance using a qualified security assessor. Visa will consider relisting both organizations following their submissions of their PCI DSS reports on compliance." Visa would not comment further. Heartland reportedly is processing on probation, which means it must meet stricter Visa security reviews, and Visa plans to fine its sponsoring banks, according to a published report. Spokespersons for neither Heartland nor RBS were available for comment early March 13.