First National Bank of Southern Africa Ltd v Karen Eleanore Duvenhage

The respondent (Duvenhage) and her husband hired a farm in KwaZulu-Natal midlands to cultivate cash crops and establish timber plantations. Two forestry permits had been issued permitting afforestation of 288 hectares, expiring on 15 May 1997 and 28 August 1997. SAPPI offered financial assistance for the plantation if the Duvenhages acquired the farm. The farm owner offered to sell the property. Duvenhage approached the appellant bank's Greytown branch manager, Roux, in December 1996 for a loan to purchase the farm. Roux allegedly assured them a loan would be advanced and continued advancing money on overdraft for land preparation. The Duvenhages continued preparing the land through 1996-1997, incurring expenses financed by the overdraft. By January 1998, no loan materialized and Duvenhage discovered Roux had never submitted the loan application. By then the planting season had ended, permits had lapsed, and SAPPI's assistance offer had expired. The venture failed. The bank sued for overdraft repayment; Duvenhage counterclaimed for damages for breach of contract and alternatively in delict based on Roux's negligence.

• Whether the losses suffered by the respondent were causally connected to the bank employee's alleged wrongful and negligent conduct
• Whether factual causation (causa sine qua non) was established between the wrongful conduct and the damages claimed
• The proper approach to determining causation in delictual claims founded on negligence
• Whether expenditure incurred and loss of profit opportunity were caused by the bank's conduct or by other factors

The appeal was upheld with costs. The order of the full court was set aside and substituted with an order dismissing the appeal with costs. The declaratory order that the bank was liable for damages was overturned.

For delictual liability based on negligence to be established, there must be a causal connection between the wrongful and negligent conduct and the loss suffered. Causation requires application of the 'but for' test (causa sine qua non): a hypothetical enquiry into what would probably have happened but for the wrongful conduct. If the loss would have ensued in any event, even absent the wrongful conduct, then the wrongful conduct is not a cause of the loss and no legal liability arises. Where a venture or transaction was independently doomed to fail due to circumstances unrelated to the defendant's conduct (such as impossibility of performance within required timeframes or misunderstanding of legal requirements), the defendant's negligent conduct cannot be said to have caused the losses flowing from that failure. The party claiming damages bears the burden of proving on a balance of probabilities that the losses would not have occurred but for the wrongful conduct.

Nugent JA made several important observations about the structure of delictual enquiry: (1) He noted academic suggestions by J C Knobel that on doctrinal grounds, loss and its causal connection might be the proper starting point for delictual enquiry. (2) He observed that while the three elements of delict are naturally interrelated, each involves a distinct enquiry that can be examined separately in any order with appropriate assumptions about the others. (3) He suggested that in practice it is often useful to consider causation before addressing the more abstract normative questions of wrongfulness and negligence, as claims frequently fail for want of causal connection. (4) He noted that the first element (legal duty/wrongfulness) involves questions of legal policy where 'the hand of history, our ideals of morals and justice, the convenience of administering the rule and our social ideas as to where the loss should fall' interplay. (5) He reminded that the negligence enquiry might not require the defendant to have taken any steps at all, noting this is often overlooked despite being stated in Kruger v Coetzee.

This case is significant in South African delictual law for its emphasis on the importance of establishing factual causation as an essential element of delictual liability. The judgment reinforces that all three elements of a delict (wrongfulness, negligence, and causally-connected loss) must be established, and liability cannot exist without proof of causal connection. The case provides practical guidance that courts should consider examining causation early in the analysis, as claims often fail at this stage, potentially avoiding prolonged litigation on more abstract normative questions of wrongfulness and negligence. It demonstrates the application of the 'but for' test (causa sine qua non) and the requirement for a hypothetical enquiry into what would have happened absent the wrongful conduct. The judgment also illustrates that where a venture was doomed to fail for independent reasons, intervening negligent conduct cannot be said to have caused the ultimate loss.