F1 The payment ecosystem

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Lesson F1: Cardholder, merchant, acquirer, network and issuer: who does what, and who earns what.

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The opening of the lesson

Why it matters

Every field in a payment message exists because one party needs to tell another something. Once you know the parties and what each one wants, ISO 8583 stops being a list of numbers and becomes a conversation:

the issuer wants to know how the card was read;
the acquirer wants to be paid;
the network wants to route the message and settle it.

In the full lesson

The concept
In the real world
Common mistakes
What to test

What module F1 covers →

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