Sullivan & Cromwell Submitted Fake AI Citations to a Federal Court. One of the Most Prestigious Law Firms in the World. Zero Humans Verified the Output.
Sullivan and Cromwell, one of the oldest and most prestigious law firms in the world, submitted court documents containing AI-generated hallucinations to a New York federal judge. Fabricated case citations. Non-existent legal sources. They filed an emergency letter begging the judge not to sanction them.
This is not a solo practitioner in San Diego. This is not a small firm cutting corners. Sullivan and Cromwell advised on the Panama Canal. They handled the Enron collapse. They are one of the five most elite law firms on the planet. And they submitted fake citations to a federal court because nobody verified what the AI produced before it got filed.
A database of AI hallucinations in legal filings, maintained by HEC Paris and Sciences Po, now contains over 1,300 documented instances in legal decisions. 1,300. That database launched one year ago.
The Brigandi case was $110,000 in sanctions for a San Diego solo. Sullivan and Cromwell is facing a federal court's displeasure and a reputational catastrophe. The firm is different. The failure mode is identical. AI produced the output. No human verified it. It went to court.
The question is not whether this is happening at your firm. It is whether anyone is checking.
Why this matters to youNo jargon — just what it means▸
Lawyers are supposed to double-check their work — especially the famous, expensive ones. So here's a jolt: one of the most elite law firms on the planet, Sullivan & Cromwell — the firm that handled the Enron collapse — filed documents in federal court that cited court cases that don't exist. An AI invented them, the lawyers didn't catch it, and it went to a judge. They had to send an emergency letter begging not to be punished.
Why it matters: this isn't some corner-cutting outfit. If a top firm let an AI make up fake facts and slip them into a courtroom unchecked, the problem isn't one careless lawyer. A running tally already counts over 1,300 cases of AI-faked legal filings — and that list is barely a year old.
So how does it touch you? Picture your court case, your custody fight, your dispute resting on documents nobody bothered to verify — full of cases the AI simply dreamed up. The machine sounds confident and authoritative whether it's right or completely fabricating. The only thing standing between you and that confident nonsense is a human who actually checks. Here, even the best didn't.
