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Delaware Chancery Sanctions Filing With AI-Generated Fake Citations

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11

Why it matters

A Delaware Court of Chancery decision in Leiske v. Kidd has put attorneys on notice: AI-generated legal briefs containing fabricated citations, invented quotations, and false legal propositions will trigger court sanctions and professional responsibility consequences. The court used the case as a cautionary example after counsel filed an answering brief riddled with hallucinated material, prompting a request for corrective action or sanctions.

The court's directive was unambiguous. Counsel must immediately notify the court upon discovering AI errors in filed documents, submit a corrected version, take full responsibility, and explain both what went wrong and how recurrence will be prevented. The specifics of the underlying dispute remain secondary to the procedural warning the decision now carries.

This Delaware ruling reflects a hardening judicial posture toward AI hallucinations in legal work. Federal appellate courts have already imposed sanctions in similar cases throughout 2026, and major firms have publicly acknowledged citation errors traced to AI assistance. State chancery courts are now applying the same scrutiny. For practitioners, the message is direct: AI-assisted drafting requires verification protocols as rigorous as traditional legal research. Hallucinated citations are no longer treated as careless mistakes—they are potential grounds for discipline and sanctions.

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