Kovacs Investments 724 (Pty) Ltd v Marais

On 29 July 2005, the respondent (seller) and appellant (purchaser) concluded a written agreement for the sale of the commercial section of a building called SANBEL in Bellville, Cape Town for R18 454 041. The purchase price was to be paid through: (a) a deposit of R8 304 319 in two installments, and (b) a balance of R10 149 722 to be secured by way of a loan from a bank by 15 August 2005. The agreement contained two suspensive conditions: (1) clause 4.1 required the purchaser to secure a loan of R10 149 722 by 15 August 2005; and (2) clause 28 required written approval from investors nominated by Interneuron Property (Pty) Ltd by 15 August 2005. The deposit due on 15 August 2005 was not paid timeously, but was eventually paid on 19 August 2005. By 15 August 2005, the appellant had only secured a loan of R9 650 000 from Standard Bank—a shortfall of R499 722. The respondent was informed of this lesser amount before 15 August 2005. On 19 August 2005, the appellant's representative informed the respondent that all suspensive conditions had been fulfilled, which was incorrect. The respondent accepted this representation and the parties proceeded to implement the sale; the appellant took possession on 20 September 2005 and collected rentals. Almost 21 months later, on 10 May 2007, the respondent discovered that the full loan amount had not been secured. The appellant's attorneys argued substantial fulfillment, waiver, or estoppel. On 25 June 2007, the respondent launched motion proceedings seeking a declaration that the agreement was of no force and effect. The appellant issued summons on the same day seeking the opposite, and alternatively claimed SANBEL was a joint venture asset.

• Whether the written agreement of sale had lapsed due to non-fulfillment of the suspensive condition in clause 4.1 (relating to securing a loan for the full amount stipulated)?
• Whether an alleged oral or tacit agreement to accept a loan of a lesser amount constituted a waiver or a variation of the contract?
• Whether such waiver or variation, if oral or tacit, was valid and enforceable given section 2(1) of the Alienation of Land Act 68 of 1981 and the non-variation clause (clause 22.3) in the written agreement?
• Whether the respondent was estopped from denying fulfillment of the suspensive condition based on his conduct in implementing the sale?
• Whether an alleged joint venture agreement existed and entitled the appellant to transfer of the property independently of the sale agreement?

The appeal was dismissed with costs, including costs consequent upon the employment of two counsel. The High Court's order declaring the written agreement of sale to be of no force and effect was upheld. The appellant's counter-application was dismissed.

An agreement to accept performance that differs in quantum from what is stipulated in a written contract for the sale of land constitutes a variation of the contract, not merely a waiver. Such a variation, if not in writing, is invalid and unenforceable for two reasons: (1) it contravenes section 2(1) of the Alienation of Land Act 68 of 1981, which requires alienation of land to be contained in a written deed signed by the parties or their authorized agents; and (2) it contravenes any non-variation clause in the contract requiring variations to be in writing. A waiver suspends enforcement of an obligation temporarily and does not alter the contract, whereas a variation changes the terms of the contract itself. Where a suspensive condition in a sale of land requires a loan of a specific amount to be secured by a specified date, accepting a loan of a lesser amount with no agreement on how the deficit will be met constitutes a variation (substituting one loan amount for another), not substantial or substituted performance. Such variation must comply with the writing requirements of the Alienation of Land Act and any contractual non-variation clause. If these requirements are not met, the agreement lapses upon non-fulfillment of the suspensive condition.

The court observed that a shortfall of almost R500,000 (approximately R499,722) cannot be dismissed as insignificant or insubstantial or 'slight', even if it represents a small portion of the total purchase price. The court noted the principle that contracts should be interpreted so as to keep them in force rather than allowing them to lapse (favor contractus), referencing Van Jaarsveld v Coetzee, but distinguished that case on the facts. The court commented on the difference between substantial/substituted performance (where there is full performance in a different manner, which may be proved by extrinsic evidence and does not require writing) and variation (where the quantum or nature of the obligation is altered). The court referenced the principle that 'oral variation masquerading as or in the guise of a waiver remains what it truly is'—a variation—citing Van As v Du Preez. The court noted that in cases of substantial performance, there had been full performance of the obligation, albeit in a different manner from that stipulated, whereas in the present case there was incomplete performance with no agreement on when and how the deficit would be secured or paid. The court also made passing comments on the joint venture claim, noting that if the appellant itself allowed the sale agreement to lapse, it is difficult to understand how it could still rely on the alleged joint venture for transfer of the property, especially when the appellant's own pleadings showed the joint venture was to be structured through the sale agreement.

This case is significant in South African contract law, particularly in relation to the sale of immovable property. It establishes important distinctions between waiver and variation of contractual terms. The judgment clarifies that accepting performance that differs in quantum (rather than merely in manner) from what was stipulated in a written agreement constitutes a variation, not a waiver. Such variations of contracts for the sale of land must comply with section 2(1) of the Alienation of Land Act 68 of 1981 (requiring written agreements) and any non-variation clauses in the contract itself. The case reinforces the principle that 'oral variation masquerading as or in the guise of a waiver remains what it truly is'—a variation. It also demonstrates the courts' commitment to upholding the formalities required for alienation of land and enforcing non-variation clauses (following SA Sentrale Ko-op Graanmaatskappy Bpk v Shifren and Brisley v Drotsky). The judgment provides guidance on when performance will be considered 'substantial' or 'substituted' performance (where there is a different manner of full performance) versus when it constitutes an impermissible variation (where there is incomplete performance with altered obligations).