Search 1,395 source-linked cases involving fabricated citations and other AI-generated legal errors.
837 judge-case associations across 551 judges and 164 courts.
Source: Damien Charlotin
Case screener
AI-related case
Fabricated: Case Law | Defendants cited 'Parrelli v. Temple Beth El of Great Neck, 304 A.D.2d 788, 789 [2d Dept 2003]' in support; court and plaintiff's counsel found no such case and the citation pointed to unrelated material.
Judges: Devin P. Cohen
AI-related case
Fabricated: Case Law | Plaintiff cited 'Knakmuhs v. Minneapolis Pub. Sch., 990 F. Supp. 2d 1035 (D. Minn. 2014)'; court was unable to locate that case and found the citation incorrect/non-existent. || Misrepresented: Case Law | Plaintiff's citation corresponded to Cooper v. Tokyo Elec. Power Co., 990 F. Supp. 2d 1035 (S.D. Cal. 2013), not the case plaintiff named. || Misrepresented: Case Law | Plaintiff cited Powell v. Nat'l Bd. of Med. Exam'rs, 364 F.3d 79 (2d Cir. 2004) as supporting declaratory relief; court noted Powell did not address or grant declaratory relief and was mischaracterized.
Judges:
AI-related case
Fabricated: Case Law | Appellant cited multiple nonexistent cases in filings; the court found the authorities do not exist and warned that fictitious case law is sanctionable.
Judges: Jeffrey T. Kuntz, Robert M. Gross
AI-related case
Fabricated: Exhibits & Submissions | Respondents submitted an exhibit titled 'Perplexity.AI Answers' containing AI-generated legal authorities and links; the court found some cited authorities irrelevant and appearing to be hallucinated and noted counsel's admission of using Perplexity.AI.
Judges:
AI-related case
Petitioner’s opening brief contained at least 15 fabricated case citations and at least nine purported quotations that do not exist in Oregon case law; counsel acknowledged reliance on unverified search-engine results and some use of AI for an outline. Court capped sanctions at $10,000, required a replacement brief limited to accurately described authorities, and required certification that no generative AI was used to draft the brief and that cited authorities were verified.
Judges: Scott A Shorr
AI-related case
See description and story here.
Judges: Kathleen Kerrigan
AI-related case
Fabricated: Case Law | Plaintiffs cited a non-existent case "Allen v. Bayshore Mall" in support of leave to amend; Court could not locate the opinion and noted possible AI-generated fabrication, warning counsel of potential Rule 11 sanctions.
Judges:
AI-related case
Fabricated: Case Law | Plaintiffs filed motions containing inaccurate or nonexistent case citations; Magistrate Judge Schwartz warned Plaintiffs about filing motions that contain inaccurate or nonexistent case citations. || Misrepresented: Case Law | Plaintiffs inaccurately represented Magistrate Judge Schwartz's prior order by stating she 'already acknowledged conflict risk by denying severance without prejudice,' which the court found to be an inaccurate statement of that order.
Judges: Eric F. Melgren
AI-related case
Fabricated: Case Law | Appellant relied on multiple non-existent, AI-hallucinated cases to support claims; the court rejected those authorities as not real and found no support in actual case law.
Judges:
AI-related case
Fabricated: Case Law | Appellants cited State v. Johnson, 194 Wn.2d 704, 451 P.3d 1082 (2019), which the court could not locate and treated as a likely fabricated citation. || Misrepresented: Case Law | Richmonds cited Osborn v. Mason County for a proposition about mandatory plumbing inspections, but the case concerns a duty to warn and does not contain the stated plumbing/inspection holding; court held the citation does not support the proposition. || False Quotes: Case Law | Richmonds quoted language attributed to Bailey v. Town of Forks that does not appear in that opinion; court noted the quoted language is not in Bailey. || False Quotes: Case Law | Richmonds attributed a municipal-immunity-related quotation to Phillips v. King County that the court found does not appear in that case. || Fabricated: Case Law | Appellants cited King County v. Vincent (167 Wn.2d 671 (2009)), which the court could not locate and treated as a likely fabricated citation. || Fabricated: Case Law | Appellants cited Carlyle v. Dep't of Soc. & Health Servs., 155 Wn. App. 895, 231 P.3d 218 (2010), which the court could not locate and treated as a likely fabricated citation.
Judges: Robert E. Lawrence-Berrey