EKURHULENI - ANC President Cyril Ramaphosa is campaigning in Daveyton on Saturday.
The door-to-door visit in Ekurhuleni comes a day after the party submitted its candidates' list to the IEC, which was leaked hours later.
And this is a violation of the Protection of Personal Information Act, according to party officials.
They say the IEC must take disciplinary steps against whoever leaked the names.
Ramaphosa says his party remains confident in the Independent Electoral Commission's systems.
He says that the commission is dealing with the matter.