A former federal government minister and the head of the department involved in the robodebt debacle will front a royal commission into the unlawful scheme.
Former Liberal MP Michael Keenan, human services minister between 2017 and 2019, and former department secretary Renee Leon will give evidence on Tuesday.
Mr Keenan retired from parliament ahead of the 2019 federal election and Professor Leon was appointed vice-chancellor of Charles Sturt University in 2021.