Payment gateways and processors are the systems that move money when you buy something online or in person. Understanding how they work matters because they're where transactions get authorized, where disputes start, and where refunds get stuck. When a payment fails, gets declined, or disappears into limbo, knowing which company handles what part of the process helps you track down your money and fix the problem faster.
These articles explain how different processors handle transactions, what happens when a charge goes wrong, how to dispute a transaction with the right company, and why some refunds take longer than others. You'll learn the difference between your bank, the merchant's bank, and the payment processor itself—and why that matters when you're trying to get your money back.