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Posts tagged #card-networks

A mix of technical deep-dives, career reflections, and dispatches from the road.

tag: #card-networks
How a Card Swipe Actually Works: The Four-Party Model and Interchange thumbnail
financeJul 8, 2026· 4 min
How a Card Swipe Actually Works: The Four-Party Model and Interchange
Tap your card and the money looks instant, but four different companies and a fee called interchange are quietly settling up behind the scenes. Here's how that machinery works and why it's suddenly a political fight.
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