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Lawyer Sanctioned $1,000 After AI-Generated Brief Contained Fabricated Citations
A federal court sanctioned a plaintiff's attorney $1,000 after discovering that an AI-generated legal brief contained misquoted precedent. The attorney had used the Claude platform to draft and then correct the filing without final human review of the citations.
May 19, 8:47 AM·1m read1 source
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A federal court sanctioned a plaintiff's attorney $1,000 after an AI-generated brief was found to contain fabricated quotations and mischaracterized legal precedent. The attorney stated that he used the Claude platform to generate the brief. A human law clerk reviewed the initial draft and identified several hallucinated quotations.
The attorney then asked Claude to correct the errors, but the platform produced additional fabricated material that was filed without further review.
The court acknowledged the attorney's candor and the steps taken to prevent recurrence. It noted that the attorney had committed to having a human with a law degree verify every citation and quotation before future filings. The court stated that Rule 11 requires attorneys to confirm the existence and validity of legal authorities they rely upon.
It added that ignorance of AI risks is no longer an excuse when those risks are known.
“How [plaintiff's lawyer] then could have blindly and solely trusted Claude to remedy the brief is difficult to fathom.”
