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How to build multi-PSP redundancy that works in production: intelligent payment routing rules, failover testing, and what breaks without them.

Creative briefs, deep dives, and case studies oh my!
Debit card processing moves funds directly from a cardholder’s bank account to a merchant through a sequence of authorization, network routing, and settlement. This guide covers how debit card processing works, what it costs in interchange and network fees, and how routing choices affect what merchants pay.
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Payment compliance spans PCI DSS, PSD2/SCA, and data residency rules that expand every time you add a payment integration. Here’s what’s actually required, who owns each part, and where compliance programs typically break down.
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