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Assurance Reporting: Principles and Practice

Guidance on preparing and presenting internal audit assurance reports aligned with the IIA Standards.

Assurance Reporting: Principles and Practice

Guidance on preparing and presenting internal audit assurance reports aligned with the IIA Standards.

Reporting principles

  • Convince with evidence. Conclusions rest on sufficient, reliable evidence.
  • Focus on risk and control, not activity. Report what matters to objectives.
  • Be balanced. Report both strengths and deficiencies.
  • Be actionable. Each finding includes a recommendation, an owner and a target date.
  • Be timely. Reporting soon after fieldwork preserves value.

Report structure

  1. Objective and scope
  2. Overall opinion — a clear assurance rating
  3. Key findings — condition, criteria, cause, effect, recommendation
  4. Management response — agreed actions and dates
  5. Appendices — methodology and limitations

Communicating to the board

  • Lead with the assurance opinion
  • Highlight risks not addressed
  • Track open recommendations across reporting cycles
  • Avoid technical jargon that obscures the message

An assurance report's value is measured by the action it prompts.

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