Writing a Clear Expert Report: A Guide for Official Experts
Structure, independence and evidence: how official experts produce reports courts and clients can rely on.
Short answer
A strong expert report answers the specific questions put to the expert, explains the evidence and method used, separates facts from opinion, and stays within the expert's appointed field. Local procedural rules always take precedence over any general template.
A practical structure
- Instructions – who appointed you, the questions asked and the deadline.
- Qualifications – your appointment, field and relevant experience, stated accurately.
- Materials reviewed – documents, inspections and tests, with dates.
- Method – how you examined the evidence and why that method fits.
- Findings – observed facts, kept distinct from interpretation.
- Opinion – reasoned answers to each question, with any limitations.
- Annexes – photographs, calculations and source documents.
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Independence and scope
An expert's duty is usually to the court or decision-maker, not to the party paying the fee. State clearly where a question falls outside your field and avoid commenting on legal conclusions reserved for the judge.
Writing for the reader
Use plain language, define technical terms, number paragraphs and summarise conclusions at the start. Readers should be able to trace every opinion back to evidence.
Frequently asked questions
Can I accept instructions outside my appointed field?
No. Decline or refer the work to an appropriately appointed expert.
Should I state uncertainty?
Yes. Explaining limits and assumptions increases credibility.
Who can see my report?
That depends on the procedure and the appointing authority; treat drafts as confidential.
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