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Imagine paying for something online—and getting charged twice for the same item. That’s one of the worst things that can happen in a payment system. It’s frustrating for customers, bad for business, and can damage trust. That’s why one of the core goals when designing any payment system is to make sure every payment is processed exactly once — not zero times, and definitely not twice. Let’s break this down in a simple way.

Apr 22, 2025 - 10:36
 0

Imagine paying for something online—and getting charged twice for the same item. That’s one of the worst things that can happen in a payment system. It’s frustrating for customers, bad for business, and can damage trust.

That’s why one of the core goals when designing any payment system is to make sure every payment is processed exactly once — not zero times, and definitely not twice.

Let’s break this down in a simple way.

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