The plaintiff, Rural Electrification Fund, engaged in rural electrification projects and purchased treated poles from the defendant, Lomagundi Poles (Private) Limited. The arrangement was that the plaintiff would pay in advance and the defendant would deliver poles to various sites. In the third quarter of 2011, the defendant began defaulting on deliveries despite receiving advance payment. As at 1 June 2012, the defendant owed US$642,152.75. The defendant's Managing Director, Jasper Makunun'unu, signed an acknowledgement of debt on 1 June 2012, agreeing to pay interest at 17.85% per annum and to execute a Notarial General Covering Bond as security. On 17 July 2012, the defendant executed the bond in the sum of US$670,913.03, registered at the Deeds Office under reference number 2593/2012 on 23 July 2012. The bond hypothecated the defendant's chattels, stock in trade and book debts. The defendant failed to pay as agreed. On 11 December 2012, the plaintiff issued a Certificate of Balance showing the defendant's liability as at 30 September 2012 was US$681,862.00, which included compound interest calculated at 17.85% per annum. The plaintiff issued summons on 8 April 2013. The parties agreed to proceed by way of special case, with the defendant abandoning its plea but seeking to avoid liability on the ground that the interest rate was higher than the prescribed rate.