Two US lawyers fined for submitting fake court citations from ChatGPT

Law firm also penalised after chatbot invented six legal cases that were then used in an aviation injury claim

pts, invented six cases he referred to in a legal brief in a case against the Colombian airline Avianca.

The judge P Kevin Castel said in a written opinion there was nothing “inherently improper” about using artificial intelligence for assisting in legal work, but lawyers had to ensure their filings were accurate.

“Technological advances are commonplace and there is nothing inherently improper about using a reliable artificial intelligence tool for assistance,” Castel wrote. “But existing rules impose a gatekeeping role on attorneys to ensure the accuracy of their filings.”

The judge said the lawyers and their firm “abandoned their responsibilities when they submitted nonexistent judicial opinions with fake quotes and citations created by the artificial intelligence tool ChatGPT, then continued to stand by the fake opinions after judicial orders called their existence into question.”

Levidow, Levidow & Oberman said in a statement on Thursday that its lawyers “respectfully” disagreed with the court that they had acted in bad faith. “We made a good-faith mistake in failing to believe that a piece of technology could be making up cases out of whole cloth,” it said.

Lawyers for Schwartz told Reuters he declined to comment. LoDuca did not immediately reply to a request from Reuters for comment, and his lawyer said they were reviewing the decision.

ChatGPT had suggested several cases involving aviation mishaps that Schwartz had not been able to find through usual methods used at his law firm. Several of those cases were not real, misidentified judges or involved airlines that did not exist.

Chatbots such as ChatGPT, developed by the US firm OpenAI, can be prone to “hallucinations” or inaccuracies. In one example ChatGPT falsely accused an American law professor of sexual harassment and cited a nonexistent Washington Post report in the process. In February a promotional video for Google’s rival to ChatGPT, Bard, gave an inaccurate answer to a query about the James Webb space telescope, raising concerns that the search company had been too hasty in launching a riposte to OpenAI’s breakthrough.

Chatbots are trained on a vast trove of data taken from the internet, although the sources are not available in many cases. Operating like a predictive text tool, they build a model to predict the likeliest word or sentence to come after a user’s prompt. This means factual errors are possible, but the human-seeming response can sometimes convince users that the answer is correct.


The judge said one of the fake decisions generated by the chatbot had “some traits that are superficially consistent with actual judicial decisions” but that other portions contained “gibberish” and were “nonsensical”.

In a separate written opinion, the judge threw out the underlying aviation claim, saying the statute of limitations had expired.

Reuters and Associated Press contributed to this report

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