AA Mutual Insurance Association Limited (AAM) was a registered insurer conducting both short term and compulsory third party insurance business. In June 1986, an order was granted liquidating the short term business only. The first five respondents were appointed as liquidators. After appointment, the liquidators discovered that AAM had overpaid its provisional income tax in respect of the 1984 and 1985 years of assessment, resulting in a credit of approximately R4.5 million in AAM's account as at 11 December 1987. The Commissioner brought this credit into account when assessing AAM to tax for the 1991 and 1992 tax years in relation to income earned by the liquidators in respect of the short term business in liquidation. The liquidators claimed the credit was due to them for distribution among creditors of the short term business, while the Commissioner contended the credit had been expunged by debits passed in respect of AAM's income tax liability during 1991 and 1992.