Acting Victorian Premier Ben Carroll has taken a veiled swipe at his former colleague and ex-treasurer Tim Pallas after documents revealed he spent almost $73,000 on a 16-day trip to Europe just two months before retiring.

Documents released on Friday revealed Mr Pallas and his chief of staff billed taxpayers $72,683 for the trip to Britain, France, Spain and Italy from September 29 to October 14. He resigned on December 16.