Colleen Makhubele is no longer a member of the Congress of the People (Cope).
Cope announced on Monday that two prominent leaders had "terminated their own contracts" by joining the South African Rainbow Alliance (SARA).
Posters depicting Makhubele's image were on street poles on Sunday, urging residents to register to vote for the "birth of a new nation".
Documents seen by News24 have Makhubele listed as the executive president.
In a press briefing, Cope also announced that Ofentse Moalusi is no longer a member of the party.
"A councillor in Johannesburg municipality has her name on the posters and on the [street] polls, and in the media circulation, as a member of SARA. As such, she has terminated her own membership of the Congress.
"Another councillor in Tshwane… the person calling himself the chairperson of SARA and therefore has taken membership of SARA, meaning that there is the termination of membership on the councillor of Tshwane," the party announced.
It said correspondence to this effect was on the way to the "former comrades" because they had "terminated their own membership since they joined SARA".
SARA is the amalgamation of minority parties, formally called the "Super Pact".
According to information on Makhubele's X account, the "arrangement is founded by the African Amalgamated Restorative Movement, the Independent Citizen Movement, Cope, the National Freedom Party and churches".
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