Incident Tracker / United States (federal)
Obi v. Cook County
·United States District Court for the Northern District of Illinois·US-FEDFineprovisional
On 2026-04-09, U.S. District Court for the Northern District of Illinois struck the motion and imposed a $4,999 sanction for repeated AI-generated fake cases, quotations, and statements of law and fact. A self-represented party submitted a complaint with 13 false quotations and fabricated or nonexistent authorities, including Marshall v. Marshall and Andrade v. Arby Concessions.
- Court
- United States District Court for the Northern District of Illinois
- Date
- 2026-04-09
- Who used the AI
- Litigant in person
- AI tool
- Not identified in the record
- Conduct
- Obi generated each brief using AI; her Rule 59(e) motion and replies contained AI hallucinations, including 13 hallucinated cases, quotes, and statements in the motion, a nonexistent Andrade case, fabricated language from Marshall and from the court’s prior order, and similar violations after at least 17 earlier fake items.
- Outcome
- Fine
- Penalty
- US$5,000
- Regulatory outcome
- No separate regulatory disposition recorded
- Status
- Provisional — written by the court-decisions pipeline, awaiting the editor
- Last checked
- 2026-09-07
Primary sources for this incident
Related regulation records for this incident
No related regulation record has been linked to this incident yet.
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Cite this record
SafeLegalAI Global Legal AI Incident Tracker, “Obi v. Cook County”, safelegalai.com/tracker/ifeoma-delliane-chinedu-obi-v-cook-county-illinois-et-al-1 (accessed 2026-10-07). Data: CC BY 4.0.