UBS, the UK’s National Health Service, Swiss Federal Railways, and Transport for London all told the FT that the report’s claims about their AI usage were either untrue or misleading. A KPMG spokesperson said the firm removed the report from its websites while conducting its own investigation.

“We expect all our people to follow our guidelines on the responsible use of AI, including human oversight to validate content and verify independent sources,” the spokesperson said.

Last month, EY withdrew a report on loyalty rewards programs that appeared to include fake footnotes and AI hallucinations.

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