The appellant, a Nigerian national born in 1965, obtained a permanent residence permit on 22 January 2004 based on his marriage to a South African citizen, Ms Vilankulo, on 25 April 2003. He was granted South African citizenship by naturalisation on 13 October 2009. On 13 April 2016, the Minister of Home Affairs notified the appellant of his intention to deprive him and his minor children of their citizenship on grounds that: (1) the appellant had obtained his permanent residence permit by false representation, having concealed that he was still married to Ms Nwafor (whom he married in Nigeria on 1 March 2003) when he married Ms Vilankulo; (2) Ms Vilankulo was a minor at the time of their marriage; and (3) the permanent residence permit was issued under the repealed Aliens Control Act after the Immigration Act had already come into effect. After receiving the appellant's representations, the Director General (acting under delegated authority) decided on 2 August 2016 to deprive the appellant and his family of their citizenship. The appellant launched a review application in the High Court under PAJA. The matter was initially referred to oral evidence by Constantinides AJ, but the parties later agreed to proceed by way of application without witnesses. Potterill J dismissed the review application on 27 June 2019 and subsequently refused leave to appeal.