, PVL3704
ASSIGNMENT 1 SEMESTER 2
2026
DUE 17 AUGUST 2026
Question 1: The Sine Causa Requirement in Enrichment Law
The requirement that enrichment must have been sine causa (without legal cause) is a
foundational element of South African unjustified enrichment law. For a successful enrichment
claim, the plaintiff must establish four general requirements: (a) the defendant must have been
enriched; (b) the plaintiff must have been impoverished; (c) the defendant's enrichment must have
been at the expense of the plaintiff; and (d) the enrichment must have been unjustified (sine causa)
(Kleyn v Viljoen 1976 (2) SA 836 (A) at 840).
The Meaning of Sine Causa
The sine causa requirement means that there must be no legal ground (just cause) for the
defendant's retention of the benefit. The function of enrichment law is to "restore economic
benefits, for the retention of which there is no legal justification, to the person or institution at
whose expense they were obtained" (Kleyn v Viljoen 1976 (2) SA 836 (A) at 840). This principle is
rooted in corrective justice—restoring the position that existed before the enriching fact took
place.
Application in Specific Enrichment Actions
The sine causa requirement manifests differently depending on the specific enrichment remedy:
Condictio Indebiti: This remedy applies where a payment was made indebiti in the widest
sense—where there was no legal or natural obligation to make such payment (First National Bank
(SA) Ltd v East Coast Design (Pty) Ltd 1995 (3) SA 429 (N) at 434). In Watson NO v Shaw NO 1935
NPD 327 at 330, the court held that an ultra vires payment can never be said to have been made
pursuant to a natural obligation. The condictio indebiti finds application where payments were
made under a void contract or where the payments were intended to fulfil obligations but failed to
do so (Kommissaris van Binnelandse Inkomste v Willers 1994 (3) SA 283 (A) at 290).
Condictio Sine Causa: This remedy is traditionally used to effect restitution in a variety of cases
where a person is enriched at the expense of another without legal ground, but no other specific
enrichment action is available (see generally Kleyn v Viljoen 1976 (2) SA 836 (A)). In Standard Bank
of Namibia v Schmidt 1998 (3) SA 400 (A) at 406, the court confirmed that when determining
whether enrichment is sine causa, the crucial question is whether a causa existed between the
parties.
ASSIGNMENT 1 SEMESTER 2
2026
DUE 17 AUGUST 2026
Question 1: The Sine Causa Requirement in Enrichment Law
The requirement that enrichment must have been sine causa (without legal cause) is a
foundational element of South African unjustified enrichment law. For a successful enrichment
claim, the plaintiff must establish four general requirements: (a) the defendant must have been
enriched; (b) the plaintiff must have been impoverished; (c) the defendant's enrichment must have
been at the expense of the plaintiff; and (d) the enrichment must have been unjustified (sine causa)
(Kleyn v Viljoen 1976 (2) SA 836 (A) at 840).
The Meaning of Sine Causa
The sine causa requirement means that there must be no legal ground (just cause) for the
defendant's retention of the benefit. The function of enrichment law is to "restore economic
benefits, for the retention of which there is no legal justification, to the person or institution at
whose expense they were obtained" (Kleyn v Viljoen 1976 (2) SA 836 (A) at 840). This principle is
rooted in corrective justice—restoring the position that existed before the enriching fact took
place.
Application in Specific Enrichment Actions
The sine causa requirement manifests differently depending on the specific enrichment remedy:
Condictio Indebiti: This remedy applies where a payment was made indebiti in the widest
sense—where there was no legal or natural obligation to make such payment (First National Bank
(SA) Ltd v East Coast Design (Pty) Ltd 1995 (3) SA 429 (N) at 434). In Watson NO v Shaw NO 1935
NPD 327 at 330, the court held that an ultra vires payment can never be said to have been made
pursuant to a natural obligation. The condictio indebiti finds application where payments were
made under a void contract or where the payments were intended to fulfil obligations but failed to
do so (Kommissaris van Binnelandse Inkomste v Willers 1994 (3) SA 283 (A) at 290).
Condictio Sine Causa: This remedy is traditionally used to effect restitution in a variety of cases
where a person is enriched at the expense of another without legal ground, but no other specific
enrichment action is available (see generally Kleyn v Viljoen 1976 (2) SA 836 (A)). In Standard Bank
of Namibia v Schmidt 1998 (3) SA 400 (A) at 406, the court confirmed that when determining
whether enrichment is sine causa, the crucial question is whether a causa existed between the
parties.
