The state-owned company is R900 million in arrears with its creditors, who are refusing to supply crucial services until they receive their money.
Post Office CEO Mark Barnes says if they don’t urgently pay creditors, all services will come to a standstill.
“Things are a bit tight at the moment but I anticipate in the next month the sun will come out for the Post Office.”
Barnes says 25 branches had to be closed as they couldn't pay rent any longer.
“The landlords ran out of patience and closed the doors and that impacted on the people who need those services or have postal boxes there.”
The Communication Workers Union (CWU)'s Clyde Mervin says they fear jobs may be at risk.
“Hopefully with the new CEO and the new boss there'll be more accountability."