(c) when it has been posted by registered or certi ed mail to his last known residential or business address in the Republic and an acknowledgment of the posting thereof is produced;
(c) xa lithunyelwe kuye ngeposi yerejista okanye iposi eqinisekisiweyo kwidilesi yakhe yokugqibela eyaziwayo yendawo yokuhlala elapha yeli leRiphabliki kuze kuboniswe isiqinisekiso seposi;