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What PCI DSS 4.0 requirements 6.4.3 and 11.6.1 ask of your payment page
Two requirements, mandatory since March 2025, target payment-page skimming: know every script, and detect when the page changes. What they mean in practice.
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How to tell if your checkout has been skimmed
A working skimmer gives you no reason to look. The checks you can run yourself in an afternoon, and what to do if you find one.