Prevent back-dated entries by locking closed accounting periods.
Go to Administration → Period Locks. The page shows the current lock status (Locked or Open), the locked-up-to date, and a history of past locks.
Click Lock Period and fill in:
| Field | Description |
|---|---|
| Lock Up To | Last date that will be locked (required) |
| Reason | Optional explanation |
Click Lock to confirm. All transactions dated on or before the lock date will be blocked from creation or modification.
Only one lock can be active at a time. To extend the lock, unlock the current one and create a new lock with a later date.
From the active lock card, click Unlock Period and confirm. The lock is removed and transactions in the previously locked period can be modified again.
Unlock operations are recorded in the Audit Trail.
