In terms of section 26(1) of the Births and Deaths Registration Act as amended 1992

1. a woman after her marriage assumes the surname of the man with whom she concluded such marriage or after having assumed his surname, resumes a surname which she bore at any prior time
2. a married or divorced woman or a widow resumes a surname which she bore at any prior time, and
3. a woman, whether married or divorced, or a widow adds to the surname which she assumed after marriage, any surname which she bore at any prior time.