A Michigan court has sanctioned an attorney who cited fake legal cases that were generated by artificial intelligence, according to the Detroit Free Press.
The details are straightforward but striking: a practicing lawyer turned to an AI tool while preparing legal arguments, and the tool produced citations to court cases that do not actually exist. Those fabricated cases made their way into the attorney's filing, and the court responded with sanctions — a formal penalty for conduct that falls short of professional standards.
This kind of error has a name in the AI world: a "hallucination." Large language models, the technology behind popular chatbots, are designed to produce text that sounds authoritative and plausible. But they do not verify facts, and they can invent realistic-looking citations — complete with case names, court references, and quotations — that have no basis in reality. To a busy lawyer who does not double-check, the output can look entirely legitimate.
The Detroit Free Press frames this as part of a growing pattern. Courts across the country have increasingly confronted lawyers who lean on AI tools without verifying the results, and judges have shown little patience for fabricated citations, regardless of whether the lawyer intended to deceive. Attorneys are held responsible for the accuracy of what they file.
Why it matters: as AI tools spread into high-stakes professional work, this case is a clear warning that the technology's confident-sounding output cannot be trusted blindly — and that the human professionals using it remain on the hook for getting the facts right.