The appellants were trustees of three investment trusts that had invested large sums, on behalf of numerous individual investors, in a business operated by the Halgryn Family Trust through high-interest revolving loans. During the six months preceding the sequestration of the Halgryn Family Trust, substantial repayments with interest were made to the appellant trusts. After sequestration, the trustees of the insolvent estate sued to recover these repayments as voidable preferences under section 29(1) of the Insolvency Act 24 of 1936. The appellant trusts challenged the constitutionality of section 29(1), particularly the onus it places on a creditor to prove that the disposition was made in the ordinary course of business and without intent to prefer.