Field Notes · 17 February 2026
What belongs in a management letter — and what does not
Clarifying the difference between an auditor’s opinion on the financial statements and the separate management letter that records control observations.
Clients sometimes worry that every control observation will appear in the auditor’s report. In a clean opinion engagement, the report addresses whether the financial statements present fairly. Control findings usually travel in a separate management letter.
The opinion letter
The opinion is brief by design. It names the statements audited, the framework (for example Japanese GAAP), the auditor’s responsibilities, and the conclusion. It is not a catalogue of every conversation we had about purchase approvals.
The management letter
Here we describe observations that deserve management attention: a bank reconciliation that sat unsigned for two months, a single employee who both records and releases wire transfers, or inventory adjustments posted without dual review. We rate urgency and suggest a practical response — not a hundred-page policy rewrite.
Using the letter well
Share it with the board or audit committee as a working document. Track which items you accept, which you mitigate differently, and which you decline with rationale. Next year’s auditors will ask what changed. A dated response file is stronger evidence than memory.