Zandills Shoe Manufacturers Ltd was indebted to NBS Bank Ltd (later BOE Bank Ltd) under two mortgage bond agreements secured by immovable property. The respondent bound himself as surety and co‑principal debtor for the company’s debts. The company was liquidated. BOE Bank proved its claim in the liquidation in terms of s 44(4) read with s 89(2) of the Insolvency Act, electing to rely solely on its security, which was valued at R800 000 and abandoned to it by the liquidators. After realisation of the security, a shortfall remained. BOE Bank then sued the respondent as surety for the shortfall. The High Court dismissed the claim, holding that the election under s 89(2) extinguished the balance of the debt and released the surety. BOE Bank appealed to the Supreme Court of Appeal.