For scheduled reversals, yes; for anything else, it drafts and a person approves. An AI agent can run accrual auto-reversals at depth 3 on the first day of the next period. An unplanned reversal is a correction, drafted at depth 2 and approved by someone who neither posted the original nor asked for the reversal.
Why is a reversal not just "undo"?
In accounting, nothing is deleted. A wrong journal is corrected by posting an equal and opposite entry, so both the mistake and its correction stay visible. That is the point: anyone reviewing the ledger can see what happened, when, and who fixed it. The structure of the entries themselves is covered in what a journal entry is.
So a reversal is a new journal, with the same risks as any other. It can be used to correct an error. It can also be used to remove an entry that was right, or to reverse an entry in one period and quietly repost it in another, moving profit between months. That is why reversals deserve the same scrutiny as original postings, and sometimes more.
Which reversals can the agent make, and which does it draft?
| Reversal type | Example | Agent | Approver |
|---|---|---|---|
| Scheduled auto-reversal | Month-end accrual reversing on day one of the next period | Depth 3, as set when the accrual was approved | None, the original approval covers it |
| Reversal of the agent's own error found before review | A journal it posted with a wrong cost centre, caught by its own check the same day | Depth 2: drafts reversal and reposting | Management accountant |
| Correction of a person's journal | A reclassification someone posted to the wrong account | Depth 2: drafts | Approver independent of the original poster |
| Reversal in a closed period | Any | Refused: the period is locked | Controller reopens if needed, then a person decides |
| Reversal of a top-side or consolidation entry | Any | Depth 2: drafts | Group financial controller |
Note the second row. Even when the agent finds its own mistake, it drafts the fix rather than reversing silently. A trail that shows "posted, reversed, reposted" all by the agent, with no person involved, is exactly the pattern auditors would question.
Which step keeps the separation of duties?
Approval of every unscheduled reversal by someone independent of the original. If the person who posted a journal can also reverse it without review, they can post an entry for a review, then remove it afterwards. If the person who asked for a reversal can approve it, a disagreement about an entry becomes one person's decision.
The agent is recorded as the preparer of the reversal. The approver's name sits next to it, along with the reason. The journal entry support template works for reversals too: what is reversed, why, and what evidence shows it was wrong.
An illustrative example
Take a logistics company two days after month end. The agent runs the scheduled reversals of 38 accruals, all set up with auto-reversal when approved. It then finds that a journal posted by a finance assistant moved 60,000 of fuel costs to the wrong depot's cost centre.
It drafts a reversal of the original and a corrected reposting, attaching the fuel card data that shows which depot used the fuel. The management accountant, who did not post the original, approves both, and the agent posts them.
The same week, a regional manager asks the agent to reverse an accrual of 25,000 for consultancy work posted in the prior month, saying the work "isn't really done yet". The period is closed. The agent refuses the reversal, records the request, and passes it to the financial controller, who decides the accrual was correct and leaves it in place.
What controls make it safe?
- Auto-reversal set at approval. The agent only runs reversals already authorised.
- Every unscheduled reversal drafted. Including the agent's own corrections.
- Independent approver. Not the original poster, not the requester.
- Closed periods are locked. Requests are refused and recorded.
- Reversal and reposting linked. So reviewers see the pair together.
Reversing a journal changes the record of a transaction. Reversing a payment tries to recover money, which is far harder and has its own rules, covered in whether an AI agent can reverse a payment. Posting rules in general are in whether an AI agent can post journal entries, with the drafting approach in how to draft journal entries for a person to post. The wider finance controls are in AI agents for finance: books you can audit.
Questions people ask
Can the agent spot reversals that look suspicious?
Yes. Reversals soon after a review, reversals followed by reposting in a different period, and reversals of round amounts by senior staff are patterns it can report to the controller.
What if an auto-reversal should not happen?
For example, when an invoice for the accrued cost will never come. The accountant changes the accrual before period end; the agent does not decide to skip a scheduled reversal.
Should reversals carry a different journal type?
It helps. A separate type makes reversals easy to list and review, and lets the ledger apply different approval rules to them.