Structured Mezzanine Investments (Pty) Ltd (SMI), a bridging financier, approved a R10 million loan facility to FXT Property Trust to fund a sectional title development. As security, the trustees of the Trust, including the appellants Odendal and Jordaan, were required to bind themselves as sureties, register a mortgage bond over property, and furnish an irrevocable guarantee. The appellants signed a deed of suretyship in April 2008. At that time, the final written loan agreement had not yet been signed by all parties, although draft agreements and facility approval letters existed and the material terms were agreed. SMI advanced funds to the Trust, which later defaulted. SMI obtained judgment against the Trust and the sureties. The appellants resisted enforcement of the suretyship, contending it was invalid for non-compliance with s 6 of the General Law Amendment Act 50 of 1956 because the principal debt allegedly did not exist when the suretyship was signed and the loan agreement was insufficiently identified.