For condonation of late filing to be granted, the applicant must: (1) provide a proper explanation of the causes of delay and explain each period of delay; (2) not merely set out generalized causes but must relate them to the time-frame of default and demonstrate materiality and effectiveness of steps taken to achieve compliance at the earliest reasonable opportunity; and (3) demonstrate that the court's discretion should be exercised in its favour. The interests of justice test requires consideration of the nature of relief sought, extent and cause of delay, effect on administration of justice and other litigants, reasonableness of explanation, importance of the issue, and prospects of success. An ex parte order against unnamed or unidentified respondents is unenforceable as any court order must be capable of enforcement, particularly because wilful non-compliance will result in contempt proceedings. Enforcement requires identification of the persons against whom the order operates.