zombie credit card loophole

When zombie credit cards attack—a loophole that can reanimate expired cards — Photo by Vitaly Gariev on Pexels

Fix Zombie Credit Cards Loophole

What is the zombie credit card loophole and how can it be stopped? Merchants can prevent terminals from silently approving dead-card transactions by tightening PCI API validation and disabling fallback processing for expired cards. In short, enforce real-time card-status checks, reject offline authorizations, and update firmware to respect expiration dates.