B2 Transaction types

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Lesson B2: Purchase to batch close: each type's messages, processing code, amount fields, PIN rule and how it is undone.

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The opening of the lesson

Why it matters

A purchase, a refund, a cash withdrawal and a balance inquiry may all start with the same card, but they are different transactions:

  • different messages;
  • a different processing code;
  • different amount fields;
  • different PIN rules;
  • a different way of being undone.

Most acquirer and network certification test plans are organised by transaction type.

In the full lesson

  1. The concept
  2. In the real world
  3. Common mistakes
  4. What to test

What module B2 covers →

The rest of the lesson opens with a supporter pass, which you can try free for 7 days.
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