1. For a suretyship to be valid and binding, the surety must actually sign the surety agreement; filling in personal details without signing is insufficient to create suretyship liability. 2. Parties may contractually consent to the jurisdiction of a magistrate's court even where the amount in dispute exceeds the court's normal monetary jurisdiction. 3. In commercial supply disputes, where a delivery is disputed, not signed for, and there is no proof of delivery, yet payment was made, the supplier must credit the customer for that payment when calculating amounts owed for subsequent deliveries. The supplier cannot ignore the disputed delivery simply because it was paid for. 4. Locus standi is established where there is clear evidence of business dealings between parties, including payment plans and acknowledgment of the business relationship by both parties, even where there are questions about corporate identity or trading names.