Sullivan & Cromwell apologizes for AI errors in filing

Sullivan & Cromwell apologized for submitting a court filing with about 40 AI-generated errors, including false citations, in a bankruptcy case. The firm admitted review policies were not followed and began an investigation.

Sullivan & Cromwell has issued a public apology after submitting a court filing containing around 40 incorrect citations and other errors caused by AI hallucinations. These mistakes surfaced in a Chapter 15 bankruptcy case involving Prince Group before a New York federal bankruptcy court. The firm acknowledged that its internal AI usage and citation review policies were not properly followed during the document's preparation. The errors, which included fabricated case law and misapplied legal provisions, were identified by opposing counsel and brought to the court's attention. Andrew Dietderich, representing the firm, accepted responsibility and expressed deep regret in a letter to Judge Martin Glenn. Sullivan & Cromwell has begun an internal investigation and is implementing corrective measures to prevent similar AI-related mistakes in future filings. The incident underscores the need for stronger AI validation protocols in the legal sector.