Zuma walked into a police station in the eastern city of Pietermaritzburg, where he is on trial for corruption, to open a criminal case against advocating Billy Downer for allegedly leaking his medical records.
Zuma stepped briskly out of his vehicle and up to the building’s entrance surrounded by security personnel, according to AFP reporters at the scene.
He was accompanied by one of his daughters and waved to people queueing outside the building as he walked past.
A small crowd of supporters gathered on the street, singing and dancing in Zuma-print t-shirts.
Aged 79, Zuma was released from prison due to ill health two months into a 15-month jail sentence for refusing to collaborate with a graft probe into his 2009-18 presidency. He was hospitalized from prison and underwent surgery for an undisclosed ailment.