Ledger
The ledger is the append-only record of every financial transaction that has ever happened in a syndicate: usage charges, event fees, shortfalls, periodic dues, expense credits, payments, reversals, manual adjustments. Every member has their own slice of the ledger; admins see all of it.
“Append-only” means transactions are never edited or deleted in place. When a charge is wrong, the admin posts a reversal — a credit that cancels the bad debit — and, if needed, a new transaction in the right shape. Both the original and the reversal remain visible forever.
A member’s balance is computed from the ledger on read. It is not a separately stored number, which is why a reversal is visible the moment it is posted.