State and lifecycle
Refunds, holds, segregation, reconciliation.
5 hands-on lessons in this topic. Read each one free, then practice it on a real double-entry ledger in the lab.
- Lesson 5
The refund
Why 'just delete the transaction' is the most expensive mistake.
- Lesson 6
Authorization holds and the reservation pattern
Why a 'wallet balance' is actually three different numbers.
- Lesson 7
Merchant float (holding money you do not own)
The pattern that separates licensed fintechs from illegal ones.
- Lesson 8
End-of-day reconciliation
Your books and the provider's books will drift. That is normal.
- Lesson 9
A purchase is three ledger events
Auth, capture, and settle each touch your books differently.