The appellant was a bookmaker operating a registered VAT enterprise. From September 1991 to June-July 1996, he overpaid R1,432,038.83 in VAT. The overpayment arose because he included 'take-back' winnings (winnings received from other bookmakers when he placed covering bets with them) in his output tax calculations. This was done in accordance with VAT Guide 404 issued by SARS. However, prior to the 1996 amendment inserting s 8(13A), the Value-Added Tax Act 89 of 1991 did not actually require take-back winnings to be included in output tax calculations - this was a legislative lacuna. The appellant used a 'netting off' method of calculation (deducting take-back winnings from winnings paid to punters when calculating input tax, rather than adding them to output tax), though the result was the same as the method in the Guide. He claimed a refund of R1,417,018.99. The Commissioner limited the refund to R336,259.93 (six months' overpayment) on the basis that payment was made according to a generally prevailing practice, invoking the limitation in s 44(3).