The respondents (sellers/developers) sold an erf in a township development to the applicants (purchasers) in terms of a written deed of sale concluded on 26 March 2007. Clause 17 of the deed warranted that the erf would be provided with electricity, water and sewerage services. The purchasers later alleged that no such services had been installed and, after giving notice, purported to cancel the contract and launched motion proceedings seeking relief based on a valid cancellation. The sellers opposed the application, contending that their obligation to install the services was subject to a tacit term that the purchasers first had to indicate where on the large erf the services were to be installed, which they had failed to do despite repeated requests.