Nedbank (Swaziland) Ltd issued summons against FirstRand Bank Ltd in July 2000 claiming, as cessionary of Swaziland Timber Products Ltd, that FirstRand had been unjustly enriched through the payment of fraudulently altered cheques deposited by third parties. After the prescriptive period had expired, Nedbank amended its particulars of claim to abandon the cession and instead allege that it itself was impoverished because cheques were intercepted in transit and, under a clearing agreement, it bore the loss. FirstRand raised a special plea of prescription, contending that the amended claim relied on a different debt and right of action, and that prescription had therefore not been interrupted by the original summons.