Solicitors instruct dispute accountants in distinct capacities depending on the stage of the case, the forum, and whether the parties require a single independent opinion or adversarial expert evidence. Understanding which role is appropriate, and the duties that attach to each, is essential to effective case management and cost control.
What Is a Dispute Accountant?
A dispute accountant (often called a forensic accountant in legal contexts) is an accountant who specialises in applying accounting, auditing, and financial investigation skills to disputes. Unlike a general auditor, whose primary duty is to the company being audited, a dispute accountant instructed as an expert witness owes an overriding duty to the court under CPR Part 35.3, their opinion must be independent, objective, and based on sufficient data.
Dispute accountants typically hold qualifications such as ACA, FCA, ACCA, or CFA, with additional training in forensic accounting and expert witness report writing. Their work product ranges from preliminary case assessments and document review lists to full CPR Part 35 expert reports, oral evidence, and participation in joint expert meetings.
Expert Witness (Party-Appointed Expert)
The party-appointed expert (PAE) is instructed by one solicitor to provide an independent expert report for use in proceedings. Under Practice Direction 35, the report must state the substance of all material instructions, identify matters of opinion, and set out the range of opinion where there is a material range.
The PAE's primary function is to assist the court on matters within their expertise, not to advocate for the instructing party. In practice, each side instructs its own expert; the court then compares competing reports, directs a joint statement of agreed and disputed issues, and may order a single joint expert if appropriate.
| Role | Instructed by | Duty | Typical output | | --- | --- | --- | --- | | Party-appointed expert | One party's solicitor | Court (CPR 35.3) | Part 35 report, JSM, trial evidence | | Single joint expert | Both parties jointly | Court | One report for both parties | | Shadow expert | One party (advisory) | Instructing party | Advice not for court | | Expert determiner | Contractual appointment | Contract / scheme rules | Binding or advisory determination |
Fraud Investigator and Financial Investigator
Where civil fraud, asset tracing, or undisclosed transactions are alleged, the dispute accountant acts as investigator before or alongside the expert witness role. Investigative work includes analysis of bank statements, general ledgers, related-party transactions, and forensic data analytics to identify suspicious patterns, hidden income, or diversion of assets.
Investigation findings may support Norwich Pharmacal applications, freezing injunctions, and disclosure orders. The investigator's report may remain privileged as litigation advice until the solicitor elects to rely on expert evidence. Careful separation between investigative work and expert witness duties avoids contamination of the expert's independence if the same individual later gives CPR Part 35 evidence.
Shadow Expert and Advisory Accountant
A shadow expert (advisory accountant) is retained by one party to review the opponent's expert report, advise on weaknesses, prepare cross-examination questions, and assist the legal team in understanding financial issues. Shadow experts do not owe a duty to the court and their work is protected by litigation privilege, their reports are not disclosed to the opponent.
Shadow experts are valuable in high-value commercial, shareholder, and M&A disputes where the quantum report is lengthy and technically complex. They attend counsel conferences, contribute to without-prejudice settlement negotiations, and may draft supplemental questions for the joint experts' meeting. They must not be confused with the party-appointed expert: the shadow expert cannot give evidence at trial unless separately instructed as an expert witness.
Single Joint Expert and Expert Determiner
A single joint expert (SJE) is instructed jointly by both parties under CPR 35.7 to provide one report on agreed questions. SJEs reduce cost where the quantum issues are narrow and both parties want an independent figure without full adversarial expert proceedings. The court may appoint an SJE if the parties cannot agree on joint instruction terms.
An expert determiner is appointed under a contractual expert determination clause, common in commercial contracts, construction subcontracts, and partnership agreements, to resolve defined disputes without litigation. The determination may be binding or advisory depending on the contract. ICAEW and RICS run expert determination schemes. The determiner's role is contractual rather than CPR Part 35, though the same financial expertise is required.
Solicitors should select the role at instruction: pre-action advisory and shadow work for strategy; PAE or SJE once proceedings are issued; investigator where fraud or asset tracing is in issue; determiner where the contract mandates it.