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Citation Safe

AI Hallucination Sanctions — UK

2 sanctioned cases on record in UK where an attorney filed briefs, motions, or other pleadings containing AI-fabricated citations. Every entry below traces to a real, publicly reported court ruling. Data pulled daily from the underlying dockets and reporter databases — last update within 24 hours.

At a glance — UK

Total cases
2
Date range
2025-05-12 — 2025-05-13
With monetary penalty
2 of 2
Distinct outcomes
2

Outcome breakdown

How courts in UK have responded when a filing contained fabricated citations.

  • Application For Extension Of Time Refused; Appeal Struck Out As Abuse Of Process; Indemnity Costs Of £24,727.20 Ordered; Permission To Appeal Denied1
  • General Civil Restraint Order (gcro) Granted For 3 Years; Case Referred To Attorney General; Costs Awarded To Applicants.1

AI tool implicated

Filings in this jurisdiction most often cite the tool as “Implied” (the ruling describes an AI-generated brief but does not name a product).

  • Google Search (Allegedly)1
  • Implied1

What this means if you practice in UK

Across 2 documented sanctions in UK, the most common judicial response is Application For Extension Of Time Refused; Appeal Struck Out As Abuse Of Process; Indemnity Costs Of £24,727.20 Ordered; Permission To Appeal Denied (1 of 2). Of the 2 cases, 2 carried an explicit monetary penalty in the ruling text.

The rulings in this jurisdiction are consistent with the pattern Citation Safe tracks nationally: when a court identifies a fabricated citation, the sanction almost always follows within days, not weeks. The attorney of record — not the AI — is on the hook. Rule 11 (federal), state analogs, and inherent authority all support monetary sanctions, disgorgement, adverse-costs orders, and bar referrals independent of the tool that produced the citation.

Practical implication: any brief that reaches a docket in UK needs a citation-existence check before filing. Existence is Layer 1 — the case has to be real. Layer 2 is quote accuracy (any quoted language must actually appear in the opinion). Layer 3 is propositional support (the opinion must actually stand for what you cite it for). Every documented sanction below failed at Layer 1 or Layer 2 — the kind of failure that is trivially catchable before filing and catastrophically visible after.

Sample penalty language from this jurisdiction: “100000 GBP”; “24727 GBP”.

All documented sanctions in UK

Comparable jurisdictions

Other courts on the Citation Safe sanctions database with a similar volume of AI-hallucination rulings on record.

Weeks with a UK ruling

Frequently asked questions

How many attorneys have been sanctioned in UK for AI-fabricated citations?
2 on record as of the latest daily update. The number is a floor, not a ceiling — only rulings where the court explicitly identified the fabricated citations on the docket are counted. Private reprimands, off-record admonishments, and pre-filing catches do not appear.
What is the most common outcome in UK?
Application For Extension Of Time Refused; Appeal Struck Out As Abuse Of Process; Indemnity Costs Of £24,727.20 Ordered; Permission To Appeal Denied is the most common recorded outcome (1 of 2 rulings with a coded outcome). Courts vary widely in how they label the same underlying disposition — a “warning” in one docket may functionally equal an “admonishment” or “order to show cause” in another.
Which AI tools appear most often in UK sanctions?
Google Search (Allegedly) appears most often (1 rulings). Named tools are the exception rather than the rule — most sanctioned briefs are simply described as “AI-generated” in the ruling text.
Where does this data come from?
Citation Safe ingests published sanctions rulings from public court dockets and reporter databases (federal PACER, state court publishers, appellate reporters). Rulings are extracted, coded for outcome and tool attribution, and republished with attribution to the source court. See /methodology for the full ingest pipeline.
How do I make sure I never appear on this list?
Run every brief through a Layer 1 + Layer 2 citation check before filing. Layer 1 confirms the case exists in a primary source; Layer 2 confirms any quoted language actually appears in the opinion. Both are deterministic checks — not AI second-opinions. Citation Safe offers a free 3-check trial or the Opposition Check $49 flat rate for one-off audits of the other side’s brief.

Verify your own brief before UK makes it 3 on this list.

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Informational only. Not legal advice. Data derived from public court records; corrections at /contact.