The respondent (Nedbank Swaziland) sued the appellant (FirstRand Bank) initially as a cessionary of Swaziland Timber Products Limited's claim based on unjust enrichment. The original claim alleged that Swazi Timber operated an account with the respondent, and that a Mr Cawood, an employee of Swazi Timber, fraudulently removed blank signed cheques, made them payable to himself and Diamond Laser Bureau, and deposited them at the appellant's Birnam branch. The proceeds were applied to reduce Cawood's and Diamond Laser's overdrawn accounts with the appellant. Despite a stop payment instruction, Nedcor paid the proceeds to the appellant and debited the respondent's account, which in turn debited Swazi Timber's account. The summons was served on 20 July 2000. After the prescriptive period had elapsed (26 June 2001 and 2 October 2001), the respondent amended its particulars of claim to delete all reference to suing as cessionary and instead alleged that it was suing in its own right. The amended claim alleged that cheques were intercepted in transit between Nedcor and the respondent, preventing the respondent from debiting Swazi Timber's account or dishonouring the cheques. The appellant filed a special plea of prescription, arguing that the amended claim relied on a different debt/right of action that had prescribed.