An Overview of Secure Credit Card Donation Processing & PCI Compliance

PCI Level 1 is the most secure level of PCI compliance and is typically for merchants that process more than 6 million Visa (or MasterCard, etc.) transactions annually. PCI Level 4 — the least stringent security level — is for merchants processing up to 1 million transactions annually. PCIComplianceGuide.org is a resource that provides complete information regarding PCI compliance levels.