Correctional Services spokesman Manelisi Wolela has denied allegations that student leader Mcebo Dla.
One of the two Soweto sisters who have accused the Department of Home Affairs of ruining their lives has been given a new ID number.
Department spokesman Mantshele Tau said Thuli Nkosi, 27, had shared her name, surname and ID number with someone in KwaZulu-Natal.
Thuli lost her ID in 2004 and has been battling to get a new one.
Tau said the department was still investigating how Thuli's sister Thembi, 29, was fraudulently married.
Thembi discovered three weeks ago that she was married to a George Chukwekere.