The son of Public Protector Thuli Madonsela crashed her state vehicle in Pretoria, her office said on Thursday.
He crashed into a wall of a home in the early hours of Wednesday morning but escaped serious injury, spokeswoman Kgalalelo Masibi said.
"The Public Protector was not a passenger at the time of the accident. She was asleep at home after returning from an official function in Sandton, Johannesburg the previous night."
Masibi said the son, who was licensed to drive, immediately reported the accident to the Garsfontein police station.
Madonsela said she would allow the law to take its course.
"I will submit myself to internal processes regarding the use of state vehicles in line with my terms and conditions of my employment.
"I have already made contact with the owners of the affected property and agreed to compensate them for the damage," she said. (Sapa)