Sullivan & Cromwell Apologizes for AI-Generated Court Filing Errors

The Wall Street law firm Sullivan & Cromwell issued a formal apology to Chief Judge Martin Glenn of the U.S. Bankruptcy Court for the Southern District of New York after submitting an emergency motion on April 9, 2026, that contained approximately 40 errors. The filing, submitted during Chapter 15 proceedings for the wind-down of Prince Global Holdings Limited, included fabricated quotations, inaccurate citations to cases such as Three Arrows Capital and BYJU’s Alpha, and non-existent legal sources caused by artificial intelligence hallucinations.

Attorneys from rival firm Boies Schiller Flexner LLP, representing objecting debtors and creditors, identified the inaccuracies. Andrew Dietderich, co-head of Sullivan & Cromwell's global restructuring team, admitted in a letter dated April 18 that the firm's internal AI protocols and review processes—which require independent verification of all AI-generated work—were not followed. He took personal responsibility for the failure to ensure the accuracy of the submission.

In response to the incident, the firm filed a corrected version of the motion along with a redline of changes and conducted a review of all filings in the Prince Global Holdings matter. Sullivan & Cromwell is currently performing an internal investigation and evaluating enhancements to its training and review procedures to prevent future occurrences of AI-generated errors in court submissions.