Expert Witness Code of Conduct in Australia

What the Code of Conduct Requires

An expert must give an independent opinion, including material that weakens the instructing party’s case. The expert is not an advocate for that party.

The Federal Court’s Harmonised Expert Witness Code describes the duty as “to assist the Court impartially”. Its Expert Evidence Practice Note attaches the code as Annexure A.

A report must identify the expert’s relevant qualifications and the factual basis of each opinion. Separate observed facts from assumptions supplied by the lawyers. State the reasoning, supporting materials and investigations relied on, including who performed them.

Identify questions outside the expert’s field. State any qualification needed to avoid an incomplete or inaccurate opinion, and explain when insufficient information prevents a concluded opinion. If the opinion changes materially, provide the required supplementary report.

An expert witness withdrawal does not itself discharge outstanding court directions. Compliance with the code does not itself decide whether witness immunity protects a particular act.

These duties let the court test the opinion. For the separate task of organising the evidence and reasoning, see how a financial expert witness report is structured.

Defining an Expert Witness

An expert witness gives opinion evidence based on specialised knowledge acquired through training, study or experience. Their expertise must relate to the particular opinion they give.

Section 79(1) of the Commonwealth Evidence Act 1995 provides an exception to the opinion rule. The opinion must be wholly or substantially based on that specialised knowledge. A professional title alone does not establish the connection.

In Makita (Australia) Pty Ltd v Sprowles (2001) 52 NSWLR 705 at [85], Heydon JA explained the need to expose that connection. The report must explain how the specialised knowledge applies to the facts assumed or observed and produces the opinion.

The High Court discusses that passage in Dasreef Pty Ltd v Hawchar at [37]. It also warns against treating case summaries as a substitute for applying the Evidence Act itself.

For example, a forensic accountant can explain why identified deposits are consistent with a stated accounting treatment. The accountant must identify the records and assumptions supporting that interpretation. Calling every deposit income without explaining transfers or refunds leaves the reasoning open to challenge.

Which Code Applies in Which Court

Use the rules for the actual proceeding, together with any specific orders. Australia has a harmonised code developed through the Council of Chief Justices of Australia and New Zealand’s rules harmonisation work. Each court’s instrument determines how it applies.

Forum	Official Authority	Acknowledgment and Report Requirements
Federal Court	GPN-EXPT (Annexure A) and Federal Court Rules 2011 r 23.13	The signed report acknowledges the code and practice note. GPN-EXPT paragraph 5.2 specifies additional statements and attachments.
NSW civil courts applying the UCPR	Uniform Civil Procedure Rules 2005 Part 31 and Schedule 7	Rule 31.23 requires the expert to read and accept the code. Without the acknowledgment, the report cannot be admitted unless the court orders otherwise.
Federal Circuit and Family Court of Australia, family law proceedings	Family Law Rules 2021 Part 7.1	Rule 7.18 sets the duty. Rule 7.21 requires an affidavit verifying the report and prescribed compliance statements. Rule 7.22 governs its contents.
Supreme Court of Victoria	Supreme Court (General Civil Procedure) Rules 2025, Order 44 and Form 44A	Rule 44.03 requires provision of the code before the report. The signed report must comply with its content requirements, including acknowledgment.
County Court of Victoria	County Court Civil Procedure Rules 2018, Order 44 and Form 44A	The County Court has its own equivalent Form 44A code. Rule 44.03 governs the signed report and provision of the code.
Queensland civil courts applying the UCPR	Uniform Civil Procedure Rules 1999, Chapter 11 Part 5 and Schedule 1C	Rule 429F requires compliance with the code. Rules 429G and 429H govern acknowledgment, admissibility and the signed report.

Retrieve NSW Schedule 7 from the legislation site. The NSW Land and Environment Court’s explanation identifies rule 31.23 and the acknowledgment requirement.

Use the official Family Law Rules, Victorian Supreme Court rules and County Court rules. Queensland publishes its UCPR on its legislation site.

A missing acknowledgment requires attention before tender. NSW rule 31.23(3) and Queensland rule 429G(4) expressly restrict admission unless the court orders otherwise. Other forums have their own compliance requirements and powers. Do not assume that signing another court’s code satisfies them.

The family law rules above concern family law proceedings. For appointing one expert for the parties, see single expert reports.

How to Find an Expert Witness

Find an expert whose specialised knowledge answers the disputed question. Professional body directories, published decisions and referrals from practitioners who have briefed similar experts can identify candidates.

Before appointment, ask for a curriculum vitae and examples of experience with comparable issues. Search published judgments for judicial comments on the person’s reasoning or independence. Read the context of any criticism, including the question the expert was asked to answer.

Ask the candidate about relationships with the parties, their advisers and relevant businesses. Establish whether the candidate has already advised someone in the dispute. Resolve actual or perceived conflicts before supplying confidential material.

An expert witness service or referral firm can introduce candidates and arrange availability. Ask who selects the expert, whether an introduction fee applies and who contracts with the expert. Assess the individual’s qualifications yourself. A referral does not establish suitability for the opinion required.

For a financial advice dispute, seek experience assessing advice quality for the products and client circumstances in issue. Relevant financial planning qualifications and practical advice experience differ from expertise in tracing bank transactions.

The Australian Securities and Investments Commission (ASIC) publishes the Financial Advisers Register. Check qualifications, work history and authorisation where the candidate provides regulated financial advice. The register covers relevant providers giving personal advice to retail clients. Registration does not establish expert-witness competence, and some specialist witnesses work outside that regulated role.

ASIC’s qualifications standard explains approved qualifications and alternative pathways. The Financial Advice Association Australia’s professional standards apply to its members. Ask how the candidate’s experience supports an opinion on the advice being challenged.

For accounting issues, compare forensic accounting services by the work and expertise your matter requires.

Where Experts Breach the Code

Experts breach their duties when they adopt the client’s position, conceal assumptions or give opinions beyond their specialised knowledge. The consequence can be reduced weight or exclusion, depending on the defect and applicable rules.

A report that assumes disputed facts must identify those assumptions. If an accountant adopts a client’s description of a payment as a loan, the report must show that assumption. The court decides whether the underlying facts are established.

Transaction analysis must be reproducible from the supplied bank records. Identify the source records, included periods and classification method. Explain calculations and the treatment of transfers between accounts so another person can follow the path to the result.

In a hypothetical example, two statements show a $12,000 debit and a matching credit between the same person’s accounts. Counting the credit as new income overstates receipts. The analysis must explain the matching basis and avoid counting the movement twice.

FinTrace saves forensic accountants hours of statement review by supplying a searchable Excel ledger and findings report from large PDF bundles. Findings cite the source PDF filename and page, putting the supporting bank data at hand for the expert’s analysis. The accountant can spend more time interpreting the financial evidence.

Expert Evidence in NCAT and VCAT

NCAT and VCAT have their own expert evidence requirements. A court report needs the relevant tribunal statements before you rely on it there.

The NSW Civil and Administrative Tribunal (NCAT) publishes Procedural Direction 3: Expert Evidence. It applies to evidence-rules proceedings, specified Occupational Division proceedings and Home Building Act claims above $30,000. It also applies when NCAT directs.

Paragraph 19 requires acknowledgment of NCAT’s code, along with the expert’s qualifications, instructions and reasons. It requires disclosure of relevant relationships or conflicts. The direction must be read with Procedural Direction 7 where generative AI is used to prepare an expert report.

In proceedings governed by evidence rules, non-compliance can affect admissibility or weight. Where evidence rules do not apply, the direction treats non-compliance as a question of weight. That distinction prevents importing a court’s exclusion rule into every NCAT matter.

The Victorian Civil and Administrative Tribunal (VCAT) publishes PNVCAT2: Expert Evidence. Its duties resemble court codes, including independence, expertise limits and disclosure of assumptions. Paragraph 13 requires a signed declaration about appropriate inquiries and relevant matters withheld from the Tribunal.

VCAT’s declaration differs from NCAT’s acknowledgment of its code. Adapt a court report to the relevant tribunal requirement and any directions. PNVCAT2 also requires relevant generative-AI disclosures under PNVCAT11. Its 2026 edition replaces the earlier practice note.

Giving Evidence: Conclaves, Joint Reports and Hot Tubbing

Expert testimony is opinion evidence within the witness’s specialised knowledge. A fact witness describes what they observed. Expert testimony allows the court to test the report’s facts, reasoning and independence. The expert usually confirms the report and addresses corrections before answering questions, including cross-examination.

Under questioning, answer within the stated expertise. Identify when a question changes an assumption or requires information outside the report. Concede a valid correction and explain its effect on the opinion. The duty to assist the court continues when an answer harms the instructing party’s case.

An expert conclave is a conference between experts to narrow the issues. The Federal Court’s conference guidance explains preparation and the usual absence of lawyers unless the court orders otherwise.

The joint report records agreement, partial agreement and disagreement, with reasons for remaining differences. Experts must exercise independent judgment. A party cannot instruct an expert to avoid agreement to preserve its litigation position. NSW UCPR rules 31.24 and 31.26 govern conferences and joint reports.

Concurrent expert evidence, often called hot tubbing, places experts together to address the same issues under the judge’s direction. They can respond to each other and, when permitted, ask each other questions. Lawyers can test their evidence within the process the judge controls.

Choose Expert Witness Training for Financial Evidence

Financial experts need training that makes them explain their reasoning from source records and practise giving independent evidence. A course must address assumptions and opinion limits as well as presentation under questioning. Compare its exercises with the duties in the applicable court code.

UNSW Unisearch’s expert witness training includes an open, one-day live online course. Its published topics cover report writing, examination and cross-examination, with court procedures for narrowing disagreement. This format suits an individual who needs guided preparation for report and witness-box work.

Unisearch also provides tailored industry workshops, expressly including finance. Those workshops can run online, at its office or at another location. A team can use that format to commission practice around its financial evidence and recurring report problems. Specify source-linked reasoning and joint-report work in the workshop brief, alongside oral questioning.

Chartered Accountants Australia and New Zealand (CA ANZ) has a broader Forensic Accounting Specialisation experienced pathway. It includes a live online course through Macquarie Business School and assessment in a small team. The pathway targets experienced forensic accounting professionals and requires practical experience as well as study before an application for specialist recognition.

Course completion records training. Optional professional recognition has its own conditions. The court still assesses whether the witness has specialised knowledge relevant to the opinion and whether the evidence meets its admissibility requirements.

For a financial team, include an exercise that tests the opinion from written report to oral explanation. The following exercise is fictional, including every filename and page reference.

1. Give the expert a ledger showing $120,000 in credits. In the fictional exercise-statements.pdf, page 4 records $70,000 in customer receipts. Page 5 shows a $20,000 transfer between the same business’s accounts, and page 6 records a disputed $30,000 receipt.
2. Ask for an opinion on customer receipts. An initial $100,000 opinion assumes the disputed payment is a customer receipt and excludes the internal transfer. Require the expert to state that assumption, cite the source pages and explain the arithmetic.
3. Introduce a loan agreement identifying the disputed $30,000 as loan principal. Ask whether that document changes the opinion. On the revised assumption, customer receipts are $70,000, with the borrowing separately classified. The expert must explain the change and any remaining factual dispute.
4. Have another expert disagree because the loan document’s authenticity remains disputed. Draft the joint report to record agreement about the internal transfer and disagreement about the $30,000 classification, with reasons. Each expert must preserve their independent view.
5. Ask the expert to explain the opinion orally and answer a question assuming the loan document is genuine. Assess whether the answer separates the changed assumption from facts the expert can establish and stays within the expert’s financial expertise.

For Federal Court training, assess the exercise against Annexure A of GPN-EXPT. Clauses 2 to 4 address impartiality, report reasoning and material changes of opinion. Clauses 6 and 7 govern court directions and independent participation in conferences. Practise explaining disagreement in a joint report before giving concurrent evidence under Annexure B.

Record the learning objective and completed activities in your own continuing professional development (CPD) record, with evidence of participation and reflection on practice. Accountants can use the accountant CPD requirements guide for their framework. Solicitors can use the legal CPD guide for their jurisdiction’s rules. Select training that lets the expert demonstrate the code’s duties in the financial evidence they actually give.