To establish 'good and sufficient cause' for rescission of a default judgment under Rule 27(2) of the High Court Rules, 2021, an applicant must satisfy three cumulative but interrelated requirements: (1) provide a reasonable explanation for the default; (2) demonstrate that the application is brought bona fide; and (3) establish a bona fide defence on the merits with some prospect of success. These factors must be assessed holistically and cumulatively, with strength in one factor potentially compensating for weakness in another. Default caused by legal practitioner negligence and inadvertence, rather than wilful or deliberate conduct by the litigant, can constitute a reasonable explanation, particularly where the applicant acted promptly upon discovering the judgment. Where an applicant demonstrates good faith and a strong, triable defence on the merits, any imperfections in the explanation for default may be excused. The court's broad discretion should be exercised to favour resolution of genuine disputes on their merits over technical finality, unless the default was wilful (i.e., a conscious decision with full knowledge of service and risks).