Courts Increasingly Expect Lawyers to Fact-Check Opponents' Citations and Report AI Hallucinations
Judges in recent cases have admonished opposing counsel for failing to alert the court when their opponents cite non-existent or fabricated cases, particularly those generated by AI. This expectation challenges the traditional legal practice where attorneys focus primarily on their own arguments rather than verifying all opposing citations. The trend reflects growing judicial concern about maintaining the integrity of court proceedings as AI-generated legal briefs become more common.
A recent appellate case in New York (Landberg v. City of N.Y.) illustrates a shift in judicial expectations regarding attorney responsibilities. Presiding Justice Hector LaSalle expressed frustration that opposing counsel failed to flag multiple fabricated case citations in their opponent's brief, questioning why they didn't bring these errors to the court's attention. The judge emphasized that courts rely heavily on the bar's integrity and professionalism. Similar expectations have emerged in at least three trial court cases, according to legal analysis. While attorneys traditionally focused verification efforts on citations critical to their own arguments, judges now appear to expect broader fact-checking of opponent briefs, even for tangential points. This creates a practical dilemma for lawyers: verifying all citations requires time and expense, yet failing to do so may invite judicial criticism and potential bar discipline.
What's missing
The article does not provide information about whether any bar associations or judicial conferences have issued formal guidance or ethics opinions on this emerging expectation, nor does it clarify whether this represents a binding obligation or merely judicial preference.
What different sources said
- ReasonRight
Obligation to Cite-Check the Cases Cited by the Other Side and Report Errors to Court
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