This database tracks legal decisions1
I.e., all documents where the use of AI, whether established or merely alleged, is addressed in more than a passing reference by the court or tribunal.
Notably, this does not cover mere allegations of hallucinations, but only cases where the court or tribunal has explicitly found (or implied) that a party relied on hallucinated content or material.
in cases where generative AI produced hallucinated content – typically fake citations, but also other types of AI-generated arguments. It does not track the (necessarily wider) universe of all fake citations or use of AI in court filings.
While seeking to be exhaustive (497 cases identified so far), it is a work in progress and will expand as new examples emerge. This database has been featured in news media, and indeed in several decisions dealing with hallucinated material.2
Examples of media coverage include:
- M. Hiltzik, AI 'hallucinations' are a growing problem for the legal profession (LA Times, 22 May 2025)
- E. Volokh, "AI Hallucination Cases," from Courts All Over the World (Volokh Conspiracy, 18 May 2025)
- J-.M. Manach, "Il génère des plaidoiries par IA, et en recense 160 ayant « halluciné » depuis 2023" (Next, 1 July 2025)
- J. Koebler & J. Roscoe, "18 Lawyers Caught Using AI Explain Why They Did It (404 Media, 30 September 2025)
If you know of a case that should be included, feel free to contact me.3 (Readers may also be interested in this project regarding AI use in academic papers.)
Based on this database, I have developped an automated reference checker that also detects hallucinations: PelAIkan. Check the Reports
in the database for examples, and reach out to me if for a demo !
For weekly takes on cases like these, and what they mean for legal practice, subscribe to Artificial Authority.
| Case | Court / Jurisdiction | Date ▼ | Party Using AI | AI Tool ⓘ | Nature of Hallucination | Outcome / Sanction | Monetary Penalty | Details | Reports |
|---|---|---|---|---|---|---|---|---|---|
| Kettering Adventist Healthcare v. Sandra Collier, et al. | S.D. Ohio (USA) | 2 January 2026 | Lawyer | Implied |
Fabricated
Case Law
(4)
False Quotes
Case Law
(1)
Misrepresented
Case Law
(4)
|
Show Cause Order | — | ||
| Source: Robert Freund | |||||||||
| Johnson v. Digital Federal Credit Union | N.D. Texas (USA) | 30 December 2025 | Pro Se Litigant | Implied |
Fabricated
Case Law
(1)
|
— | |||
| M.T. Real Estate Investment Inc. v. Servis One, Inc., et al. | D. Nevada (USA) | 30 December 2025 | Lawyer | Unidentified |
Fabricated
Case Law
(4),
Doctrinal Work
(1)
|
Briefs Struck; Adverse Costs Order; Bar Referral | — | — | |
| Ng v. AmGuard Insurance Company, et al. | S.D. New York (USA) | 29 December 2025 | Pro Se Litigant | Implied |
Fabricated
Case Law
(1)
|
Court warned the pro se plaintiff that future filings containing nonexistent citations may result in sanctions (striking filings, filing restrictions, monetary penalties, or dismissal) and instructed parties to disclose and verify any use of generative AI per local rules. | — | ||
| In re S.A., D.H., and B.M., Minors | CA Illinois (USA) | 29 December 2025 | Lawyer | Implied |
False Quotes
Case Law
(4)
|
Warning | — | — | |
| Rachel Jones v. Experian Information Solutions, Inc. | E.D. Michigan (USA) | 29 December 2025 | Pro Se Litigant | Implied |
Misrepresented
Case Law
(1)
|
Warning | — | — | |
| Cherleatha B. v. Frank Bisignano | D. South Carolina (USA) | 29 December 2025 | Pro Se Litigant | Implied |
Fabricated
Case Law
(1)
|
Warning | — | — | |
| Allen v. Amazon | N.D. Texas (USA) | 23 December 2025 | Pro Se Litigant | Unidentified |
Fabricated
Case Law
(1)
False Quotes
Case Law
(1)
|
Warning | — | — | |
|
Amazon alleged that Allen's undisclosed use of AI produced non-existent case citations and hallucinated quotations; the court declined to sanction, warned Allen and required future compliance with local AI-disclosure rule. |
|||||||||
| Matter of: KE System Services, Inc. | GAO (USA) | 22 December 2025 | Pro Se Litigant | Implied |
Fabricated
Case Law
(2)
False Quotes
Case Law
(1)
|
— | — | ||
| Smith v. Clarence Smith et al. | N.D. New York (USA) | 22 December 2025 | Pro Se Litigant | Implied |
Fabricated
Case Law
(3)
Misrepresented
Case Law
(2)
|
Warning | — | ||
| Billups v. Louisville Municipal School District | N.D. Mississippi (USA) | 19 December 2025 | Lawyer | Grok |
Fabricated
Case Law
(1)
Misrepresented
Case Law
(3)
|
Counsel DQ'd; monetary sanction; obligatory audit of all past filings | — | ||
|
The court also identified five other cases in which the same firm or attorney confessed having misused AI. This despite the attorneys attending CLE training |
|||||||||
| Disability Rights Mississippi v. Palmer Home for Children | N.D Mississippi (USA) | 19 December 2025 | Lawyer | Implied |
Fabricated
Case Law
(3)
False Quotes
Case Law
(5)
|
Monetary sanction; CLE requirement; notification to bar and other courts; attorney withdrawal. | 20883 USD | ||
| Fantini v. WestRock Services, LLC | D. New Jersey (USA) | 19 December 2025 | Pro Se Litigant | Implied |
Fabricated
Case Law
(1)
|
Warning | — | ||
| Robert Lafayette v. Alex Abrami et al | Vermont SC (USA) | 18 December 2025 | Pro Se Litigant | Implied |
Fabricated
Case Law
(1)
False Quotes
Case Law
(1)
Misrepresented
Case Law
(1)
|
Adverse Costs Order; Pre-Filing Injunction | 7361 USD | — | |
|
Order to show cause is here. |
|||||||||
| JPMorgan Chase Bank, N.A. v. Christina Buenzli | CA California (USA) | 18 December 2025 | Pro Se Litigant | Implied |
Fabricated
Case Law
(6)
False Quotes
Case Law
(3)
|
— | — | ||
| Gerou v. George, Whitten, and United States | E.D. Wisconsin (USA) | 18 December 2025 | Pro Se Litigant | Implied |
Fabricated
Case Law
(3)
False Quotes
Case Law
(1)
Misrepresented
Case Law
(3)
|
Warning | — | — | |
| Edward Starski v. Chandler Holderness | CA Appeals (USA) | 18 December 2025 | Pro Se Litigant | Implied |
Fabricated
Case Law
(1)
False Quotes
Case Law
(1)
|
Warning | — | — | |
| Angelica E. Cruz et al. v. United States of America | C.D. California (USA) | 16 December 2025 | Lawyer | Implied |
Fabricated
Case Law
(1)
|
Order to Show Cause | — | — | |
| In re Ricardo Andres Romeu | CA Texas (USA) | 16 December 2025 | Pro Se Litigant | Implied |
Fabricated
Case Law
(1)
|
Warning | — | — | |
| Taylor v. Prince George’s County, Maryland | D. Maryland (USA) | 16 December 2025 | Lawyer | Implied |
False Quotes
Case Law
(1)
Misrepresented
Case Law
(2)
|
— | |||
| Dorsey v. Jones | Delaware C. Ch. (USA) | 16 December 2025 | Lawyer | Implied |
Fabricated
Case Law
(1)
False Quotes
Case Law
(1)
|
Order to certify future filings re: AI | — | — | |
| Liza Gardner v. Sean Combs, et al. | D. New Jersey (USA) | 15 December 2025 | Lawyer | Unidentified |
Fabricated
Case Law
(1)
|
Monetary fine; Bar Referral; Order to serve order to Client | 6000 USD | — | |
|
Counsel had already been sanctioned in different case, and professed having gone through CLE on generative AI. |
|||||||||
| Source: Robert Freund | |||||||||
| Sayali Kulkarni & Abhijit Kulkarni v. Merit Systems Protection Board | CA Federal Circuit (USA) | 15 December 2025 | Pro Se Litigant | Implied |
Fabricated
Case Law
(1)
False Quotes
Case Law
(1)
|
Affirmed the Board; granted motions to strike the Kulkarnis' informal reply briefs containing the false citations/quotes | — | ||
| Lexos Media IP, LLC v. Overstock.com, Inc. | D. Kansas (USA) | 15 December 2025 | Lawyer | Unidentified |
Fabricated
Case Law
(2)
Misrepresented
Case Law
(1)
|
Order to Show Cause | — | — | |
| Braica v. Frankowski (Anthony Braica v. Tom Frankowski) | D. Connecticut (USA) | 15 December 2025 | Pro Se Litigant | Implied |
Fabricated
Case Law
(2)
False Quotes
Case Law
(2)
Misrepresented
Case Law
(7)
Outdated Advice
Overturned Case Law
(1)
|
Briefs struck; warning | — | — | |
| Johnson / Estate of Fisher v. City of Annapolis | D. Maryland (USA) | 13 December 2025 | Lawyer | Implied |
Fabricated
Case Law
(1)
Misrepresented
Case Law
(1),
Exhibits or Submissions
(1)
|
(Attorney was dismissed by its client) | — | ||
| Source: Volokh | |||||||||
| Couvrette v. Wisnovsky | Oregon (USA) | 12 December 2025 | Lawyer | Unidentified |
Fabricated
Case Law
(1)
False Quotes
Case Law
(1)
|
Briefs struck; Monetary sanction; Adverse costs order; claims dismissed with prejudice | 15500 USD | ||
|
Order to show cause is here. |
|||||||||
| McLain v. Board of County Commissioners of Sedgwick County, Kansas, et al. | D. Kansas (USA) | 11 December 2025 | Pro Se Litigant | Implied |
Fabricated
Case Law
(1)
Misrepresented
Case Law
(1)
|
Warning | — | ||
| Preston House v. TH Foods, Inc. | D. Nevada (USA) | 11 December 2025 | Pro Se Litigant | Implied |
Fabricated
Case Law
(1)
Misrepresented
Case Law
(1)
|
Admonishment | — | — | |
| Arkansas DHS v. April Ward and Minor Child Respondents | SC Arkansas (USA) | 11 December 2025 | Lawyer | Implied |
Fabricated
Case Law
(1)
False Quotes
Case Law
(1)
Outdated Advice
Repealed Law
(1)
|
Show Cause Order | — | — | |
| Sean Gottlieb v. Adtalem Global Education | N.D. Illinois (USA) | 10 December 2025 | Pro Se Litigant | Implied |
Fabricated
Case Law
(1)
|
Order to Show Cause | — | ||
| Russell v. Mells | CA Florida (USA) | 10 December 2025 | Lawyer | Unidentified |
Fabricated
Case Law
(1)
Misrepresented
Case Law
(1)
|
Bar Referral | — | — | |
|
"Unfortunately, we're finding this problem arising more and more frequently […] When a lawyer cites imaginary legal authorities to our court as if they were law, we are compelled to refer that lawyer to the Bar because of the professional rules of conduct. It doesn't take much moral imagination to understand why. As judges, we rely on attorneys to ethically represent their clients. We expect that representation to be zealous, honest, and competent. Indeed, lawyers owe the courts and their clients a duty to practice with competence and candor. By signing an appellate brief, a lawyer certifies that he or she has read the document and that to the best of the lawyer's knowledge, information, and belief there are "good grounds to support the document." These ethical requirements are not excused simply because a computer program generated a faulty or misleading legal analysis. Nor is it an excuse that the attorney did not intend to mislead the court. "To state the obvious, it is a fundamental duty of attorneys to read the legal authorities they cite in appellate briefs or any other court filings to determine that the authorities stand for the propositions for which they are cited." Obviously, that didn't happen when Ms. McLane filed this answer brief. Instead, counsel "fundamentally abdicated" her duty to the court and her client when she submitted this filing without verifying that the three cases cited in her brief said what she claimed they said. Accordingly, it is our duty to refer this matter to the Florida Bar to proceed as it deems appropriate." |
|||||||||
| Source: Volokh | |||||||||
| James Fahey v. Wally’s Las Vegas, LLC, et al. | D. Nevada (USA) | 10 December 2025 | Pro Se Litigant | Implied |
Fabricated
Case Law
(1)
False Quotes
Case Law
(1)
Misrepresented
Case Law
(1)
|
Warning | — | ||
| South Side Area School District et. al v. Pennsylvania Human Relations Commission, | Pennsylvania CC (USA) | 10 December 2025 | Lawyer | Implied |
False Quotes
Case Law
(1)
Misrepresented
Case Law
(1)
|
— | — | ||
|
See story here. |
|||||||||
| Sharky’s Sports Bar, et al. v. Village of Mt. Morris, Illinois, et al. | N.D. Illinois (USA) | 10 December 2025 | Lawyer | Implied |
Misrepresented
Case Law
(2)
|
Warning | — | ||
| Christian Dusablon v. Hugh A. Gibbs and Union Logistics, LLC | S.D. New York (USA) | 9 December 2025 | Lawyer | Implied |
Fabricated
Case Law
(1)
|
Warning; Order to Certify validity of future citations | — | ||
| Scott M. Boger v. City of Harrisonburg, Virginia, et al. | W.D. Virginia (USA) | 9 December 2025 | Pro Se Litigant | Implied |
False Quotes
Case Law
(1)
Misrepresented
Case Law
(1)
|
Warning | — | — | |
| Brian Jeffrey Hall Jr. v. Halsted Financial Services, LLC | W.D. Virginia (USA) | 8 December 2025 | Pro Se Litigant | Implied |
Fabricated
Case Law
(1)
|
Warning | — | — | |
| Jodell Dodge v. FirstService Residential Arizona LLC | D. Arizona (USA) | 8 December 2025 | Lawyer | Federally Lawyer |
Fabricated
Case Law
(1)
False Quotes
Case Law
(3)
Misrepresented
Case Law
(2)
|
Bar Referral | — | ||
| Thomas Duncan v. Gridhawk et al. | W.D. Texas (USA) | 6 December 2025 | Pro Se Litigant | Implied |
Fabricated
Case Law
(2)
False Quotes
Case Law
(1)
|
Plaintiff's objections struck | — | — | |
| Associated Builders and Contractors v. Bucks County Community College | CC Pennsylvania (USA) | 5 December 2025 | Lawyer | Unidentified |
Fabricated
Case Law
(1)
|
Brief struck and ignored | — | — | |
| Donnie Yarn and Deshawn Murphy v. Trader Joe's | D. Oregon (USA) | 5 December 2025 | Pro Se Litigant | Implied |
Fabricated
Case Law
(1)
|
Order to Show Cause | — | ||
| Source: Jesse Schaefer | |||||||||
| Shana Jordan, et al. v. Chicago Housing Authority et al. | CC Illinois (USA) | 5 December 2025 | Lawyer | ChatGPT |
Fabricated
Case Law
(2)
False Quotes
Case Law
(1)
Misrepresented
Case Law
(4)
|
Motion partly struck; Monetary sanctions | 59500 USD | — | |
|
(Motion for sanctions available here.) "The court’s focus here is not the misuse of artificial intelligence to conduct unreliable legal research and drafting. It is the inexcusable submission of false authority and factual arguments to the court, the subsequent misrepresentations about the extent of the improper conduct, and the failure to take prompt responsibility for errors once discovered. The obligations on officers of the court at issue here precede by centuries the age of electronic research and artificial intelligence. The failures to meet those obligations do serious damage to the respect for the legal profession, and they merit sanctions. The most serious sanctionable conduct consists of actions taken after the attorneys had time to consider the consequences of submitting false statements of law and facts to the court, and had time to discover and disclose the full extent of the errors in citations and in factual assertions. [...] Artificial Intelligence is not the cause of bad legal practice. Lawyers performed their obligations well and performed their obligations poorly before Al, before electronic research platforms, before on-line publication of case law, and before the development of the West Key Number System or Shepard’s indexes. Submission of false legal citations and demonstrably false factual claims pose a grave threat to the judicial branch. People are skeptical of institutions, and the legal profession is not exempt. We are duty-bound to attend to the integrity the courts so that close scrutiny reveals a model of honesty, accountability, and truth-seeking. The authority of the courts relies on public confidence that rulings are just and are grounded in the law, not on the whims of judges. “[A] lawyer should further the public’s understanding of and confidence in the rule of law and the justice system because legal institutions in a constitutional democracy depend on popular participation and support to maintain their authority.” (IRPC Preamble, par. 6) Officers of the court cannot become comfortable with careless or deliberate misrepresentation of facts or the law." |
|||||||||
| In re: Nupeutics Natural, Inc.; Gladstone v. Peatross | S.D. California (USA) | 5 December 2025 | Lawyer | Unidentified |
Fabricated
Case Law
(1)
Misrepresented
Case Law
(1),
Legal Norm
(2)
|
Monetary Sanction; CLE; Bar referral | 950 USD | ||
| Mullins v. Duquesne University of the Holy Spirit | W.D. Pennsylvania (USA) | 5 December 2025 | Pro Se Litigant | Implied |
False Quotes
Case Law
(3)
|
Reply struck; Order to disclose AI use | — | ||
| Dalton Gage Hill v. Oklahoma County Criminal Justice Authority et al. | W.D. Oklahoma (USA) | 4 December 2025 | Lawyer | ChatGPT |
Fabricated
Case Law
(1)
|
Costs Order; Mandatory disclosure of AI use in future filings; CLE obligation | — | — | |
|
Underlying report & Recommendations can be found here. |
|||||||||
| Source: Robert Freund | |||||||||
| Black Oak Capital BOCA, LLC v. Paul Evans, LLC, et al. | D. Utah (USA) | 4 December 2025 | Lawyer | Implied |
Fabricated
Case Law
(2)
False Quotes
Case Law
(1)
|
Order for counsel to read cited authorities and file a certification within 30 days | — | — | |
| Jacob Barry Allston v. Ron DeSantis, et al. | M.D. Florida (USA) | 4 December 2025 | Pro Se Litigant | Implied |
Fabricated
Case Law
(1)
False Quotes
Case Law
(2)
|
Warning | — | — | |
| Dorsey v. Ponce, et al. | N.D. Illinois (USA) | 4 December 2025 | Pro Se Litigant | Implied |
Fabricated
Case Law
(4)
|
Warning | — | — | |
| Tiffany Regina Ringer v. Bank of America, N.A. | N.D. Georgia (Atlanta Division) (USA) | 4 December 2025 | Lawyer | Implied |
False Quotes
Case Law
(1),
Legal Norm
(1)
Misrepresented
Case Law
(1)
|
Fine; Ordered to submit statement of training/oversight | 1500 USD | — | |
|
The court found numerous quotation and citation inaccuracies in Defendant's Memorandum. Counsel admitted the errors, denied using AI, and the court concluded the errors were negligent violations of Rule 11. The court recommended sanctions including public identification, a $1,500 payment, and oversight measures; the firm must submit a statement of training/oversight. |
|||||||||
| Source: Robert Freund | |||||||||