Litigants’ usage of AI-hallucinated cases, quotes, and citations in briefs and other case filings is becoming increasingly common, based on a Bloomberg Law analysis of court opinions and other judicial orders. In 2025, instances in which lawyers and pro se litigants were caught misusing generative AI have increased sevenfold.
As tech-savvy litigants swiftly adopt artificial intelligence tools, they take on the risk associated with relying on a generative AI chatbot to conduct legal research, often failing to verify hallucinated case law before building their legal briefs. The results of the data analysis bolster the perception that AI misuse is expanding ...