Superb Motors Inc. et al. v. Anthony Deo et al.
E.D. New York · Apr 30, 2026
- Jurisdiction
- federal
- Court
- E.D. New York
- Record ID
- superb-motors-inc-et-al-v-anthony-deo-et-al-2026-04-30
- Observed outcome
- The court imposed a $1,500 monetary sanction on attorney Harry R. Thomasson, payable to the Court Registry.
- Known monetary consequence
- $1,500
Why this matter warrants attention
The court sanctioned attorney Harry R. Thomasson $1,500 for violating Federal Rule of Civil Procedure 11 by submitting legal briefs containing fabricated, AI-generated case citations. The court rejected the attorney's defense that malware caused the errors, emphasizing that attorneys must personally verify the existence and validity of all cited legal authorities.
The court reasoned that Rule 11 requires attorneys to conduct a reasonable inquiry into the validity of legal contentions. It found that presenting AI-generated hallucinations as valid case law constitutes subjective bad faith and that an attorney's duty to verify citations is non-delegable, regardless of alleged computer malware or pro se status.
This case reinforces that attorneys remain strictly liable for the accuracy of their filings, even when appearing pro se. It clarifies that blaming technical issues like malware does not excuse the failure to verify AI-generated research, establishing a clear precedent for Rule 11 enforcement in the E.D.N.Y.
Failure modes and consequences
- Fake Citations
- Contract
- Trial
- Monetary
- AI attribution
- Explicitly Recorded
- Recorded tool
- generative artificial intelligence
- Known monetary consequence
- $1,500
- Procedural posture
- The court issued a sua sponte Order to Show Cause regarding Rule 11 sanctions following the identification of fabricated citations in a pro se defendant's opposition brief. The court subsequently issued a Memorandum and Order imposing monetary sanctions.
Damien Charlotin case archive
Publisher document archive. The recorded document is hosted in the upstream publisher archive.
Open underlying sourceA recorded source link is not a substitute for checking the underlying order, filing, opinion, or disciplinary record.
What this record does—and does not—establish
The court identified the use of generative AI.
The record summarizes the outcome described in the linked public source. The recorded document is hosted in the upstream publisher archive. This page is not a substitute for the complete docket, subsequent history, or jurisdiction-specific advice.
Latest evidence review: Primary Document Verified (high confidence).
Controls suggested by the public record
- Implement mandatory manual verification of all case citations, regardless of the research tool used.
- Maintain a documented record of citation verification steps taken prior to filing any legal submission.
- Avoid reliance on automated research tools that do not provide verifiable links to primary legal sources.
- Ensure that all legal staff are trained on the risks of AI-generated hallucinations and the requirements of Rule 11.