The High Court of England and Wales has issued a stern warning to lawyers regarding the misuse of artificial intelligence (AI) in their work, specifically stating that generative AI tools like ChatGPT are not reliable for conducting legal research.
Key Points from the Judgment
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Verification Required: Judge Victoria Sharp emphasized that lawyers must verify the accuracy of any information produced by AI tools through authoritative sources before using it in court documents or filings.
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Risks of AI: "These tools can produce false information that appears coherent and plausible," Judge Sharp noted, highlighting that they are not capable of conducting reliable legal research.
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Recent Cases: The ruling follows two recent cases where:
- A lawyer submitted a filing with 45 citations, 18 of which did not exist.
- An attorney cited five non-existent cases in a court document.
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Professional Obligations: Lawyers who fail to comply with their professional obligations risk facing severe sanctions, including:
- Public admonition
- Cost imposition
- Contempt proceedings
- Referral to law enforcement
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Duties of Lawyers: Judge Sharp stated, "Lawyers have professional duties which require them to take reasonable care when preparing documents for filing." Relying on unverified AI-generated information without verification can lead to a failure of these duties.
Implications for Law Firms
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Understanding AI Limitations: The ruling underscores the risks associated with relying on AI in law firms’ work processes. While AI can assist with tasks such as document review and contract analysis, its limitations must be understood.
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Expert Opinion: David Gilroy QC from One Essex Court Chambers remarked that while AI can assist with certain tasks, it should not be relied upon as a primary source for legal research. He noted, "There is no guarantee that any output from an AI system will accurately reflect what was input into it."
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Need for Policies: Gilroy pointed out that many law firms lack adequate safeguards against the misuse of AI by individual staff members. He stressed the importance of developing robust policies governing the use of AI within organizations and ensuring compliance among staff.
Conclusion
Judge Sharp’s warning serves as a crucial reminder for lawyers to exercise caution when using artificial intelligence in legal work processes. It is essential for legal professionals to verify the accuracy of any information produced by AI tools through authoritative sources before incorporating it into court documents or filings.

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