Today, I am at a client and performing a PCI Audit. “What,” you may say, “is a PCI Audit”? The PCI Security Audit Procedures are designed for use by assessors conducting onsite reviews for merchants and service providers required to validate compliance with Payment Card Industry (PCI) Data Security Standard (DSS) requirements. This helps ensure that any vendor you are doing business with and accepts payment via charge card complies with a set of guidelines that protects your personal information. This audit reviews Internet security, who has internet access, how charge card numbers and CVCs are stored, what happens your charge card data after it is processed and how data is destroyed, when necessary. Vendors with a storefront should have a badge proving they have passed a PCI Audit. It is a quarterly requirement and merchants are insisting on it more than ever.
Some content from https://www.pcisecuritystandards.org/pdfs/pci_audit_procedures_v1-1.pdf.