A New York appellate court has ruled that a father must pay a $250 sanction for submitting a custody appeal brief that included fabricated legal citations, allegedly generated by artificial intelligence. This ruling, issued on May 27, 2026, in the case of Matter of Julien v. Arthur (Docket No. 2024-03307), highlights the growing concerns over the use of generative artificial intelligence (GenAI) in legal documents.
The court's decision comes amid increasing scrutiny of how technology is changing the legal landscape, especially as more individuals represent themselves in court without legal counsel. The ruling emphasizes the importance of verifying legal citations and the consequences of failing to do so, even for pro se litigants.
The case involves Kevin A. Julien, the father, and Danielle M. Arthur, the mother, who were never married and share custody of a child born in June 2020. The dispute began when Julien filed for parental access in March 2021, and Arthur subsequently sought sole custody in May 2021. The Family Court granted Arthur sole legal and residential custody in April 2024, leading to Julien's appeal.
Background
Kevin A. Julien and Danielle M. Arthur have been embroiled in a custody battle over their child since shortly after the child's birth. In March 2021, Julien filed a petition for parental access, while Arthur sought sole custody two months later. The Family Court initially granted a temporary order allowing Julien some parental access.
However, the situation escalated when Arthur filed a family offense petition in June 2023, alleging that Julien had failed to return their child after visitation and had assaulted her in the presence of the child. Following a series of hearings, the Family Court ultimately awarded Arthur sole custody, citing Julien's lack of support and incidents of violence.
Julien, representing himself, appealed the Family Court's decision, arguing that the court was biased against him and that its findings were based on false information. However, his appeal took a controversial turn when he submitted a brief that included a citation to a nonexistent legal case, raising questions about the reliability of his sources.
The Ruling
The Appellate Division, Second Department, ruled that Julien's use of GenAI to draft his appellate brief constituted frivolous conduct. The court stated, "The unverified usage of GenAI to draft an appellate brief containing false information constitutes frivolous conduct warranting the imposition of a sanction, even when the offending party is a pro se litigant." Judge Paul Wooten, along with Justices Colleen D. Duffy, Carl J. Landicino, and Susan Quirk, concurred in the decision.
In its opinion, the court noted that Julien's brief contained bracketed language indicating that he had not completed certain sections, suggesting a lack of thoroughness in his submission. The court emphasized the need for all litigants, including those without legal representation, to verify the accuracy of their legal citations.
Impact
This ruling sets a significant precedent regarding the use of AI in legal documents. It underscores the responsibility of litigants to ensure that any information presented to the court is accurate and legitimate. The court's decision serves as a warning to other pro se litigants that they may face similar sanctions for relying on unverified sources.
The ruling could influence how courts handle cases involving AI-generated content in the future. As more individuals turn to technology for assistance in legal matters, the potential for misinformation increases, prompting the need for stricter guidelines and oversight in legal filings.
What's Next
Julien has the option to appeal the ruling, but the court's decision is currently binding. There are no related cases pending that directly address the same issue of AI usage in legal briefs, but the implications of this ruling may encourage further discussions and potential regulations regarding the use of technology in the legal field.