It has been stated that it seems that a judgment has been erroneously granted if there existed at the time of its issue a fact of which the judge was unaware of which would have precluded the granting of the judgment and which would have induced the judge (if aware of it) not to grant the judgment. Judgments have been rescinded on the ground of a mistaken belief on the part of the court that the defendant knew of the hearing when in fact this was not the case.
Acting justice of appeal Dlodlo in South African Revenue Services v Mhlongo (JA 115/2013) [2015] ZALAC 3 (12 March 2015) at para 5 with footnotes omitted.