 The courts have exercised an equitable discretion to refuse a claim for specific performance, usually on the grounds of impossibility, undue hardship or in claims for the enforcement of personal services.An order for specific performance is enforced in keeping with the ordinary rules of procedure.The cases of "Benson v SA Mutual Life", "Santos v Igesund" and "Haynes v King William's Town Municipality" set out guidelines to be taken into consideration where the court is asked to grant specific performance.