History can't be rewritten after the fact
Your past financial records shouldn’t change just because you changed a rule today.
In UniLedger, new accounting rules, exchange-rate settings, and other configuration changes apply going forward. Documents that have already been posted keep the values and treatment they had at the time.
Posted means fixed
Once a document is posted, later changes to your rules don’t silently recalculate it.
That means an invoice from six months ago won’t suddenly produce a different result because you changed how future documents should be handled.
Reports stay reproducible
Historical reports are only useful if the numbers behind them stay stable.
Because posted documents preserve the rules and values used at the time, you can return to an older period and see the same financial picture instead of a version rewritten by today’s settings.
Change the future without changing the past
You can improve your accounting rules whenever you need to.
The new logic applies to new documents, while existing records remain intact. That lets your system evolve without making your financial history unreliable.
A clear audit trail
Stable historical records make it easier to understand how a number was produced and what rules applied at that moment.
No silent retroactive changes. No mystery when an old report suddenly looks different.