Case-Law Citation Verification: A Checklist for Lawyers in England and Wales

Case-law citation verification means proving four things about every authority in a skeleton argument, pleading or advice. The case exists and is the one you meant. Any quotation matches the judgment. The case is still good law. And the paragraph you rely on actually supports the proposition you cite it for. For solicitors and barristers in England and Wales, this is part of the duty not to mislead the court.

This guide covers England and Wales. Scotland and Northern Ireland have their own courts, procedural rules and professional regulators, so check the position there separately.

Why does citation verification matter in England and Wales?

The key judgment is the Divisional Court's decision in R (Ayinde) v London Borough of Haringey [2025] EWHC 1383 (Admin), heard with Al-Haroun v Qatar National Bank. In Ayinde, the defendant's solicitors could not find five of the cases cited in the grounds for judicial review, and searches showed they did not exist (paragraphs 39 to 40). In Al-Haroun, a schedule of 45 citations put before the court found that in 18 instances the case did not exist, and many real cases did not contain the quoted words or support the propositions (paragraph 74).

The court's guidance applies to every lawyer who cites authority:

• Freely available generative AI tools "are not capable of conducting reliable legal research." They may cite sources that do not exist or quote passages that do not appear in a genuine source (paragraph 6).
• Lawyers who use AI for research have "a professional duty therefore to check the accuracy of such research by reference to authoritative sources," before using it to advise clients or before a court (paragraph 7).
• The duty also rests on lawyers who rely on the work of others who have used AI (paragraph 8).
• A lawyer is not entitled to rely on a lay client for the accuracy of citations or quotations in documents the lawyer puts before the court (paragraph 81).

The court listed its powers where lawyers breach their duties: public admonition, costs orders, wasted costs orders, striking out a case, referral to a regulator, contempt proceedings and referral to the police (paragraph 23). Placing false citations before the court is likely to breach regulatory requirements and make a referral to the regulator appropriate (paragraph 29). Save in exceptional circumstances, admonishment alone is unlikely to be enough (paragraph 31).

Professional rules set the baseline. The SRA Code of Conduct for Solicitors, RELs, RFLs and RSLs says you do not mislead or attempt to mislead the court (paragraph 1.4), you only make submissions which are "properly arguable" (2.4), and you draw the court's attention to relevant cases and statutory provisions of which you are aware and which are likely to have a material effect on the outcome (2.7). Where you supervise others, "you remain accountable for the work carried out through them" (3.5). For barristers, the BSB Handbook says you must not knowingly or recklessly mislead or attempt to mislead the court (rC3.1), must take reasonable steps to ensure the court has before it all relevant decisions and legislative provisions (rC3.4), and must not draft a document containing a contention you do not consider properly arguable (rC9.2.b).

Which sources count as authoritative?

Ayinde names them: the Government's database of legislation, the National Archives database of court judgments, the official Law Reports published by the Incorporated Council of Law Reporting, and the databases of reputable legal publishers (paragraph 7).

In practice:

• Find Case Law from The National Archives describes itself as "the official and free source for judgments and decisions from courts and tribunals in England and Wales." Its coverage for most courts starts in the early 2000s, and not every decision is written down, so a missing judgment is a prompt to search further, not proof it is fake.
• legislation.gov.uk holds the statutory text. Check the version in force at the date that matters for your case.
• For the form of report to cite, the Practice Direction (Citation of Authorities) 2012 applies "throughout the Senior Courts of England and Wales, including the Crown Court, in county courts and in magistrates' courts." If a judgment is reported in the Official Law Reports (A.C., Q.B., Ch., Fam.), "that report must be cited." Otherwise cite the W.L.R. or All ER, then an authoritative specialist series, then other reports. An unreported case "should not usually be cited unless it contains a relevant statement of legal principle not found in reported authority."

The Practice Direction also puts a verification duty on the advocate: a report presented to the court must be legible, and the advocate must be "satisfied that it has not been reproduced in a garbled form from the data source" (paragraph 13).

What should you verify for each authority?

Run two passes. The first confirms identity and source. The second tests legal weight, currency and fit.

A neutral citation gives you the year, the court and the judgment number. Find Case Law's guide to reading judgments gives the example "[2024] UKSC 15" as a Supreme Court case from 2024, number 15. If a neutral citation, court and year do not line up with the judgment you open, stop and find out why.

How do you confirm you have the right case?

Start with the neutral citation or the court reference number. Open the judgment and compare the court, date, judges and parties. Then check:

• Same parties, different judgment. One dispute can produce a first-instance judgment, a permission decision, an appeal and a costs ruling. Make sure you cite the one that decides your point.
• Report versus transcript. Reports can differ from each other and from the transcript. Where one report is fuller or reports conflict, the 2012 Practice Direction lets you depart from its order if you briefly explain why and give the alternative references (paragraph 11). Record which version you used.
• Headnotes. A headnote is the reporter's summary, not the court's words. Quote the judgment.

In Ayinde, the court noted the barrister could have checked her cases by searching the National Archives' caselaw website (paragraph 67).

Does the judgment actually support the proposition?

Find the quoted words or the cited paragraph. Read the whole passage, then the conclusion. Ask:

1. Is this part of the ratio, or obiter, a dissent, or a summary of counsel's argument?
2. What issue was the court deciding at that point?
3. Are there limiting facts or qualifications nearby?
4. In an appellate court with several judgments, which reasoning commands a majority?
5. Does the order match your characterisation?

Quote only what you need and give the paragraph number. Many practitioners format citations using OSCOLA or the house style a court prefers. Formatting is separate from verification, though. A neatly formatted citation to a case that does not support your point still misleads the court.

How do you check that a case is still good law?

Check two things: the case's own appeal history, and how later courts have treated it. Search the case name and neutral citation for later judgments that follow, distinguish, doubt or overrule it. A citator tool is a good starting point, but read the later judgments that matter. A flag may relate to a different point, and an absence of flags does not mean the proposition is safe.

Check the court hierarchy too. A High Court decision that was later considered by the Court of Appeal or the Supreme Court needs to be read with the later judgment. If the case turns on a statute, check whether the provision has been amended or repealed since.

Record the date of every check. "Good law" without a date and a proposition is not a useful statement.

How should you check AI-assisted research and drafts?

The judiciary's AI guidance for judicial office holders, dated 31 October 2025, says AI tools may "make up fictitious cases, citations or quotes, or refer to legislation, articles or legal texts that do not exist." It calls AI "a poor way of conducting research to find new information you cannot verify independently," and says final material "should always be checked against maintained authoritative legal sources." It also states that "All legal representatives are responsible for the material they put before the court/tribunal and have a professional obligation to ensure it is accurate and appropriate." Judges may ask lawyers to confirm they have independently verified research or citations generated with an AI chatbot.

Use a stop rule. If one AI-assisted citation fails, treat the whole output as unverified:

1. Extract every case, statute, quotation and paragraph reference from the draft.
2. Confirm each authority exists on an authoritative source.
3. Check every quotation word for word against the judgment.
4. Check appeal history and later treatment.
5. Rebuild the argument from verified authorities rather than patching single citations.
6. Record what changed, who checked it and the research cut-off date.

In Ayinde, the solicitor was referred to the SRA in part over the steps he took after the other side's letter made clear the cases could not be found (paragraph 72). When an opponent questions a citation, verify it at once.

Case law citation verification checklist

• Copy each material proposition and its citation into a verification log.
• Locate the judgment on Find Case Law or in the report you will cite, and save the link.
• Match court, judges, date, parties and neutral citation.
• Cite the report the 2012 Practice Direction requires, or note why you depart from it.
• Find each quotation word for word and record the paragraph number.
• Confirm the passage is ratio, not obiter, dissent or argument.
• Check appeal history in the same case.
• Search for later judgments that doubt, distinguish or overrule it.
• Check the statutory text on legislation.gov.uk for later amendments.
• Make sure the court has the relevant decisions before it, including adverse ones you know of (SRA 2.7, BSB rC3.4).
• Check copies in the bundle are legible and not garbled.
• Have a second reviewer check authorities that decide the application or the advice.

What should you do when a citation fails?

Ayinde also warns that a lawyer who places false material before the court is at risk of a wasted costs order (paragraph 30). Fast, candid correction matters: the court listed whether an immediate, full and truthful explanation was given among the factors that shape its response (paragraph 24).

How can teams make citation checks repeatable?

Set a minimum evidence standard and scale review to the stakes. A background note can sample peripheral citations. A skeleton argument for a contested hearing needs full source, quotation and treatment checks on every authority. The responsible lawyer sets the tier, and supervisors should check that juniors and paralegals know the standard.

Keep the log with the work product: proposition, citation, source link, paragraph, history and treatment, reviewer and date. Our litigation readiness plan guide covers the wider controls around a matter, and the guide to evaluating legal AI accuracy shows how to test research tools against the same citation standard. If your team also files in US courts, see the US version of this checklist.

Gotham lets UK legal teams research UK case law and legislation, review contracts at scale and draft in Word, in one workspace, and every answer cites the passage it relies on. To see how that fits your review process, talk to Gotham with one representative research task.

This checklist is general information, not legal advice. Court rules, practice directions and professional obligations vary, so a qualified lawyer should review the authorities in each document put before the court.

Questions about citation verification in England and Wales

What did the High Court decide in Ayinde v Haringey about fake citations?

In R (Ayinde) v London Borough of Haringey [2025] EWHC 1383 (Admin), the Divisional Court said lawyers who use AI for legal research have a professional duty to check its accuracy against authoritative sources before using it. The duty also applies to lawyers who rely on others' work. The court referred lawyers in both cases before it to their regulators.

Which law report should I cite in an English court?

Under the Practice Direction (Citation of Authorities) 2012, if a judgment is reported in the Official Law Reports, that report must be cited. If not, cite the Weekly Law Reports or All England Law Reports, then an authoritative specialist series, then other reports. An unreported case should not usually be cited unless it contains a relevant statement of legal principle not found in reported authority.

Can a solicitor rely on counsel or the client for the accuracy of citations?

Not safely. In Ayinde, the Divisional Court said the duty to check AI research rests on lawyers who rely on the work of others who used it, and that a lawyer is not entitled to rely on a lay client for the accuracy of citations. The court also found a solicitor's response inadequate once fake cases had been flagged.

Do I have to tell the court I used AI?

The judicial AI guidance dated 31 October 2025 says that, provided AI is used responsibly, there is no reason why a legal representative ought to refer to its use, though this depends on context. It also says all legal representatives are responsible for the material they put before the court and have a professional obligation to ensure it is accurate.