What this means
Start with the exact decision in front of you.
Accountancy investigations often involve large engagement files, communications and financial records. Preserve source material and identify the exact information request before drafting an explanation or commissioning a retrospective review.
Immediate priorities
Organise the position before responding.
Issue a proportionate preservation instruction
Map document owners, systems and engagement files
Check reporting, insurance and employer obligations
Detailed guidance
The procedure, evidence and possible route from here.
01
Read the notice before searching everything
An initial letter may be an assessment request, formal investigation notice, production requirement or proposed allegation. Identify the body, procedure, respondent, engagement and date range before launching a broad search. Record each requested category, deadline and format. Accountancy matters can span years and multiple systems; an uncontrolled collection creates duplication and confidentiality risk without proving completeness. A scoped preservation and collection plan is more defensible than downloading every available mailbox.
Check who owns and controls engagement files, audit platforms, working papers, client communications, personal devices used for work and archived data. A former employee may not have authority to remove firm records, while a firm should avoid overwriting an individual's contemporaneous work. Identify routine deletion schedules and suspend relevant deletion proportionately. Keep the original source, metadata and chain of custody for material likely to be disputed.
- Define body, regime, respondent and date range
- List systems and lawful custodians
- Pause relevant deletion before collection
02
Preserve context and technical versions
Working papers should be preserved with review notes, sign-offs, version history and links to the evidence available at the time. A clean exported PDF may omit the audit trail necessary to explain who did what. Keep native or system-generated versions where possible and record export methods. Do not insert a retrospective conclusion into a historic file. Later analysis should be separately dated and should identify the standards and information on which it relies.
Technical standards, ethical requirements, firm methodology and regulatory rules may have changed since the engagement. Preserve the version applicable to the conduct, alongside any later material used for remediation. A current standard should not be applied retrospectively without analysis. Create a standards index connecting each proposed breach or allegation to the relevant paragraph, conduct date and respondent role. This turns a large document exercise into a focused evidential review.
- Retain review trails and sign-offs
- Label retrospective analysis clearly
- Index the standards in force at the relevant time
03
Coordinate duties and communications
Check obligations to cooperate with the regulator, report to the professional body, notify insurers, preserve litigation material and maintain client confidentiality. Privilege and confidentiality require careful handling, but neither should be used as an unexplained refusal. Identify the holder and basis, prepare a schedule where appropriate and use secure transfer. If several respondents share counsel or advisers, examine conflicts and information boundaries before exchanging internal accounts.
A first acknowledgement can confirm preservation and timing without giving a hurried technical defence. If the request is unclear, ask targeted questions and propose a realistic timetable supported by search information. Keep a production log recording what was searched, withheld, redacted or later corrected. Public statements and client updates should be controlled because an investigation is not a finding. Use accurate language and consider market or listed-company disclosure through the appropriate specialist route.
- Check cooperation, reporting and insurance duties
- Record privilege and confidentiality decisions
- Maintain a complete production and correction log
Key questions
Keep the analysis tied to this stage.
What information must be produced and by whom
Whether privilege or confidentiality affects handling
Whether urgent regulatory or client risk exists
Advice is provided only by the regulated firm that accepts a matter.
Common questions
Clarifying the route without assuming the outcome.
Should an engagement file be tidied after a regulator writes?
No. Preserve the file as it exists. Any later explanation, chronology or technical analysis should be separately dated and clearly distinguished from contemporaneous working papers.
Can a regulator ask for confidential client information?
The answer depends on its statutory or contractual powers and the applicable rules. Identify the request, privilege holder and confidentiality basis, then address handling through the proper procedure.
Connected guidance
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Official sources
Check the material for this question.
Sources checked 19 September 2026. Rules change, so compare the current notice and linked official material and tell the operator if a citation or summary needs correction.