A has demanded payment from B of an amount of R50,000 which he believes B is owing. B has checked its records and has paid the amount in the bona fide belief that the amount is owing in terms of their contract. Unbeknown to B, his bookkeeper, C had already paid the amount a week earlier by way of an electronic funds transfer into the account of A. At the time of the second payment A's account was overdrawn in the amount of R30,000 and was therefore in credit of R20,000 after the payment. A has taken R15,000 out of his account to pay his employees their monthly wages. He has also paid R10,000 for a luxury weekend after realising that his account was in credit.

Which statement regarding the requirements for an enrichment action is correct?