Regulation Tracker / United States (state)

Al-Hamim v. Star Hearthstone, LLC, 2024 COA 128 (Colo. Ct. App. 26 Dec 2024)

Colorado Court of Appeals · Colorado

last revised 2024-12-26last verified 2026-09-041 versioncountry page →

Judgment (guidance)In forceVerification duty

map categories:Sanctions for AI misuse Duty to verify AI output Disclosure of AI use in filings

The Colorado Court of Appeals published Al-Hamim to address AI hallucinations in appellate briefing. It held that fictitious AI-generated citations violate C.A.R. 28(a)(7)(B), exercised discretion not to sanction the self-represented appellant, and warned that future AI-hallucinated filings may result in sanctions.

Applies to: lawyers, litigants
Effective: See version history
Current version: 2024 COA 128 · 26 Dec 2024
Last verified: 04 Sept 2026
Official text: www.coloradojudicial.gov/system/files/opinions-2024-12/24CA0190-PD.pdf

What the document requires

Submitting a brief containing AI-generated fictitious citations violates C.A.R. 28(a)(7)(B)
The division declined to sanction the self-represented litigant but stated it will not look kindly on similar infractions in the future
First Colorado appellate treatment of the appropriate sanction for generative AI hallucinations

Version history

Version	Date	What changed	Source
2024 COA 128current	2024-12-26	Published opinion	official

Related court incidents on the record

Salloum v. Department of Transportation, No. 25CA1748 (Colo. App.)2026-08-27 Warning
Al-Hamim v. Star Hearthstone, LLC, 2024 COA 1282024-12-26 Warning

Sources

Al-Hamim v. Star Hearthstone, LLC (PDF)

Cite this record

SafeLegalAI Legal AI Regulation Tracker, "Al-Hamim v. Star Hearthstone, LLC, 2024 COA 128 (Colo. Ct. App. 26 Dec 2024)" (Colorado Court of Appeals, 2024 COA 128, 2024-12-26), safelegalai.com/regulation/us-state/us-co-al-hamim-star-hearthstone (accessed 2026-09-04). Data: CC BY 4.0.