What is Core Ledger?
System of record for balances, postings, and account history at a bank or fintech.
+200 −50 → balance $1,150
The core ledger is…
Write it in your own words in the app.
In real work
Core ledger posting lagged 90 seconds. Pause API payouts until replication catches up.
In the illustration
The stamp head posts +$200 on one line and −$50 on the next; the balance counter rolls from $1,000 to $1,150 and the history stays in the book.
Explain in your finance platform how a card refund posts to the core ledger: the accounts debited and credited, and when the customer sees it.
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