The plaintiff, Hwange Coal Gasification Company, a coal and coke producer, entered into a contract with the defendant, Philcool Investments (Pvt) Ltd, a haulage transport company, on 14 September 2017 for the transport of plaintiff's products to clients in Zambia. On 21 September 2017, the parties entered into a tripartite fuel supply agreement with Headbolls Investments (Pvt) Ltd, where plaintiff would make advance fuel payments to Headbolls for defendant's use, with defendant standing as surety. By January 2018, plaintiff had advanced USD117,000 for fuel which Headbolls failed to deliver. Plaintiff also made advance transport payments of USD25,917.50 for undelivered loads and identified twelve loads of coke valued at USD104,400 that defendant failed to deliver to clients. On 5 June 2018, defendant executed an acknowledgment of debt for the total amount of USD247,317.50, undertaking to pay "as quickly as possible." Despite this acknowledgment, defendant failed to pay. The plaintiff sued for the amount owed plus interest and costs. Defendant filed a special plea raising two grounds: (1) that plaintiff was improperly cited as "Hwange Coal Gasification Company" omitting "(Pvt) Ltd," rendering the summons a nullity; and (2) that the debt should be expressed in RTGS dollars pursuant to Statutory Instrument 33 of 2019, not US dollars.