1. Notification to a legal practitioner of an intention to serve summons does not amount to service in terms of court rules - summons must be served by the Sheriff in accordance with the rules. 2. Service by affixing, while an acceptable mode of service, presents inherent difficulty in establishing that a litigant was actually aware of the service and chose to ignore it. 3. Wilful default requires more than negligence or carelessness - it implies intentional transgression, meaning conscious disregard of an obligation. Where summons are served only by affixing and not personally, it cannot be held affirmatively that the litigant received and intentionally ignored the summons, thus wilful default cannot be established. 4. Where there is a background agreement between parties, potential claims for unjust enrichment, and issues of legality and enforceability requiring full trial, a court should not deny a litigant the opportunity to present their case at the interlocutory stage when prospects of success are being considered.