On 27 July 2015, the plaintiff and first defendant entered into a credit facility agreement for the sale and delivery of stock feeds on credit. The second defendant bound herself as surety and co-principal debtor for the first defendant's debt. Payment was due within 30 days of invoice date. Between July 2015 and May 2016, the first defendant allegedly took delivery of stock feeds and accumulated debt of US$39,503.66 (later amended to US$39,500.66) which it failed to pay. The plaintiff issued summons on 13 December 2016. The defendants initially denied owing anything and disputed delivery of stock feeds. During trial, defendants admitted liability for US$17,678.66 (for which pink copies of delivery notes were produced), leaving US$21,822.00 in dispute relating to three invoices (302, 307, and 308). For invoices 302 and 307, the plaintiff could not produce pink copies of delivery notes. For invoice 308, a delivery note was produced but defendants challenged its authenticity.