Expert Reports: UK vs US vs Canada vs EU Differences

Last updated: 5 October 2026

Photo: United Nations - Mr Kasman

Expert reports jurisdictions vary in important procedural and substantive ways. While the underlying purpose of country expert evidence is similar across jurisdictions — providing the tribunal with specialised knowledge to assess an asylum claim — the formal requirements, the weighting given to expert opinion, and the typical structure of reports differ significantly between the UK, US, Canada, and EU Member States. Furthermore, an expert who has prepared a report appropriate for one jurisdiction may need substantial adjustments to meet the standards of another. As a result, practitioners and experts must understand these differences before commissioning or preparing reports. This article compares the four jurisdictions and identifies the key practical differences.[1]

See related: expert report contents.

United Kingdom: CPR 35 and Upper Tribunal Practice

In the UK, country expert evidence is governed by Civil Procedure Rules Part 35 and Practice Direction 35, as applied in immigration proceedings. The leading Upper Tribunal authority is MN and KY (Iran) [2014] UKUT 1, which sets out criteria for assessing expert evidence: qualifications, independence, methodology, currency, specificity, and reasoned conclusions. Furthermore, UK expert reports must include a signed statement of truth and must acknowledge the expert's duty to the court. As a result, UK reports are typically structured with formal procedural sections (instructions, qualifications, duty to court) followed by substantive analysis. Therefore, UK practitioners expect a 30-80 page report with extensive sourcing.[2]

Specific UK practice points

UK practice emphasises several specific points. First, country guidance cases (CG cases) are binding — experts must engage with them and explain agreement or disagreement. Second, the Home Office's Country Policy and Information Notes (CPINs) are key evidence — experts should address these directly. Third, sur place evidence is increasingly important and should be addressed where relevant. Fourth, experts may be cross-examined at hearing — and so should be prepared to defend their methodology in oral evidence. Furthermore, the Upper Tribunal has issued guidance on country expert evidence that is mandatory reading. As a result, UK expert practice is procedurally rigorous and substantively demanding.[3]

United States: Daubert and BIA Practice

US asylum proceedings before the immigration courts and the Board of Immigration Appeals (BIA) follow a different framework. Federal Rule of Evidence 702, as interpreted in Daubert v Merrell Dow Pharmaceuticals (1993), governs expert testimony — requiring that expert evidence rest on reliable principles and methods. Furthermore, immigration judges have substantial discretion in receiving expert evidence. As a result, US country expert reports are often shorter than UK ones (10-30 pages typically) and may take the form of written declarations submitted under penalty of perjury. Therefore, US experts typically write more focused, less procedurally formal reports.[4]

Specific US practice points

US practice differs in several respects. First, BIA precedential decisions on country conditions function similarly to UK CG cases but are less rigid. Second, the Department of State Country Reports on Human Rights Practices are heavily weighted — experts must engage with them. Third, in-person testimony is more common than in the UK, and experts may be called to testify at the master calendar or merits hearing. Fourth, "country conditions" testimony from a non-expert (e.g., an applicant's family member living abroad) may be received as evidence — unlike in the UK. Furthermore, the role of "consultant declarations" (where a country expert advises but does not testify) is recognised. As a result, US practice has more flexibility but also less procedural protection.[5]

Canada: Mohan and White Burgess

Canadian expert evidence in immigration proceedings is governed by the Immigration and Refugee Board Rules and the common-law expert evidence framework. The Supreme Court of Canada's decisions in R v Mohan [1994] 2 SCR 9 and White Burgess Langille Inman v Abbott and Haliburton Co [2015] 2 SCR 182 establish the criteria: relevance, necessity, qualification, and absence of an exclusionary rule. Furthermore, the IRB maintains National Documentation Packages (NDPs) for each country — essentially a curated country evidence library. As a result, Canadian experts must engage with the NDP for the relevant country. Therefore, the Canadian system has both a procedural framework and a robust country evidence base built in.[6]

Specific Canadian practice points

Canadian practice has distinctive features. First, the IRB's Refugee Protection Division (RPD) and Refugee Appeal Division (RAD) operate differently — and expert evidence may carry different weight in each. Second, Designated Countries of Origin (DCOs) — historically — created presumptions against claims, though the DCO regime was struck down as unconstitutional in 2019. Third, the Federal Court conducts judicial review of IRB decisions, applying reasonableness review. Furthermore, Canadian decision-makers often expect a more focused report addressing specific questions, with strong sourcing. As a result, Canadian expert practice combines common-law rigor with institutional country evidence resources.[7]

European Union: Member State Variation and EUAA Guidance

The EU's asylum system operates through national procedures in 27 Member States, with shared standards under the Common European Asylum System (CEAS) and the new EU Pact on Migration and Asylum (2024). Furthermore, the European Union Agency for Asylum (EUAA, formerly EASO) produces Country of Origin Information (COI) reports that Member States use. As a result, expert reports in EU Member States vary widely in format and weight — German courts often expect detailed expert opinions (Gutachten), French courts emphasise the OFPRA process, while Italian courts may rely heavily on country evidence over individualised expert assessment. Therefore, EU practice is fragmented but increasingly informed by EUAA standardisation.[8]

Substantive Differences in Risk Assessment

Beyond procedural differences, substantive standards for risk assessment vary. The UK uses "reasonable degree of likelihood" or "real risk" — below balance of probabilities. The US uses "reasonable possibility" — interpreted broadly in Cardoza-Fonseca (1987) as potentially as low as 10%. Canada uses "reasonable chance" — similar to UK standard. The EU uses "real risk" for subsidiary protection and "well-founded fear" for refugee status — applying the QD framework. Furthermore, the threshold for Article 15(c) QD (indiscriminate violence) has been clarified in Elgafaji and subsequent cases. As a result, the legal threshold differs slightly across jurisdictions, but all are below balance of probabilities. Therefore, experts should be prepared to articulate risk in the language appropriate to the jurisdiction.[9]

"Although the substantive legal standards for refugee protection are broadly aligned internationally, procedural rules on expert evidence vary significantly between jurisdictions. A high-quality report in one jurisdiction may need recalibration for another."Comparative Asylum Practice Working Group, 2024 Report

Cross-Border Use of Reports

Reports prepared for one jurisdiction can sometimes be used in another with modifications. For example, a UK country expert report may be useful in a Canadian or US case — with an updated cover page and statement adapting to that jurisdiction's procedural rules. Furthermore, the substantive country analysis often translates well across jurisdictions because the country conditions are the same. As a result, where a client has cases in multiple jurisdictions or is moving between countries, a single core report may serve as the foundation for multiple submissions. Therefore, cross-jurisdictional report sharing is a practical efficiency where the expert's underlying analysis is robust.[10]

Conclusion: Know the Jurisdiction Before Commissioning

Expert reports jurisdictions differ significantly in procedural and substantive expectations. UK practice is procedurally rigorous; US practice is more flexible; Canadian practice combines rigor with institutional evidence resources; EU practice varies by Member State. Furthermore, the substantive standards are broadly aligned but expressed in different language. As a result, practitioners should identify the jurisdiction first and brief experts accordingly. Therefore, no expert should be commissioned without clarity on where the report will be filed and what standards apply there.