LACO6221 / LAW OF CONTRACT – COMPLETE IN-DEPTH STUDY GUIDE
Chapters 1–13 (Units 1–5)
Test Date: 4 May 2026
This guide is now significantly expanded with:
•
•
•
•
•
•
•
•
•
Full explanations of every concept (why it exists, policy reasons, historical context).
Simplified breakdowns for quick understanding.
Multiple real-world and exam-style examples.
Key cases with facts + ratio decidendi + outcome + why it is testable.
Every possible distinction lecturers love to test.
Common pitfalls / misinterpretations and how to avoid them.
Exact past-question style from your lecture slides.
Cross-references to CPA, Constitution, and good faith.
Revision tips and self-test questions at the end of each chapter.
Mastery strategy for 4 May
1. Read the full explanation once.
2. Cover it and explain it aloud in your own words (use the simplified version as a
checklist).
3. Do the examples as hypotheticals.
4. Memorise every requirements list, distinction table, and case ratio.
5. Redo all past questions from your slides at the end of each chapter. Print this,
highlight requirements/cases, and make Anki flashcards for definitions + ratios.
CHAPTER 1: THE NATURE AND BASIS OF CONTRACT (Unit 1, Theme
1 – Parts 1 & 2)
1.1 What is a contract? (Full definition + policy)
A contract is an agreement between two or more parties that is intended to create
legally enforceable personal rights and obligations.
•
•
•
It is voluntary (parties choose to bind themselves).
It creates only personal rights (in personam) – you can sue the other party, but not
the whole world.
Contrast with real rights (in rem) – e.g. ownership of property.
Why does the law enforce contracts?
•
•
•
Sanctity of contract (pacta sunt servanda) → promotes certainty, reliance, and
economic activity.
Freedom of contract → parties know their own interests best.
But limited by good faith, public policy, and fairness (Constitution s 8 horizontal
application).
Simplified: Contract = serious agreement + legal intention to be bound. No legal intention →
not a contract.
Examples
•
•
•
You and your friend agree to split rent on a flat → contract (commercial intention).
You promise to take your friend to dinner → usually not a contract (social/family
arrangement – no legal intention).
Marriage / partnership / employment / suretyship → these are more than ordinary
contracts because they create status or fiduciary duties in addition to personal
obligations.
Testable distinction (appears every year)
•
•
Ordinary contract → only personal rights/obligations.
Contracts that are MORE than ordinary → marriage, partnership, agency,
employment, suretyship (create extra duties).
1.2 Requirements for a valid contract (the 5 pillars – know cold)
Every valid contract needs ALL of the following (missing even one = no contract or defective
contract):
1.
2.
3.
4.
5.
Consensus (true meeting of minds – actual or apparent agreement).
Contractual capacity (parties must be legally able to bind themselves).
Legality (purpose and performance must not be illegal or against public policy).
Possibility + certainty (performance must be possible and terms clear enough).
Formalities (only if required by law or the parties – e.g. writing for land sales).
Explanation of each
•
•
•
Consensus protects autonomy.
Capacity protects vulnerable parties (minors, mentally impaired).
Legality protects society.
•
•
Possibility/certainty prevents vague or impossible promises.
Formalities give evidence and prevent fraud.
Consequence if missing
•
•
•
•
•
No consensus → no contract at all (or voidable).
No capacity → void or voidable at the option of the incapacitated party.
Illegality → void ab initio.
Impossibility/uncertainty → no contract.
Missing formalities → usually invalid or unenforceable.
1.3 Contract vs other areas of law
•
•
•
Law of obligations: contract is one source (others = delict, unjustified enrichment,
statute). Contract is the only voluntary source.
Law of property: contract creates the obligation to transfer ownership; it does not
transfer ownership itself (that requires delivery + intention).
Law of delict: if a contract is induced by fraud, you may have both contractual and
delictual remedies.
1.4 Historical development (brief but testable)
Roman law → Roman-Dutch law (causa required) → English influence (consideration) →
modern SA law follows causa (not consideration).
1.5 The dual basis of contract (the MOST important theory section – tested annually)
South African law uses both subjective and objective approaches:
•
•
Subjective (Will Theory): actual mental consensus is required. If parties are not ad
idem (of one mind), no contract.
Objective (Declaration Theory): what a reasonable person would think from the
words and conduct matters. Protects reliance.
Reconciliation (Sonap Petroleum v Pappadogianis 1992)
•
•
•
Courts look at objective appearance first.
If the other party reasonably relied on that appearance, the contract stands unless
the mistaken party proves a reasonable (iustus) error.
This balances autonomy with commercial certainty.
Simplified:
•
•
•
Will theory = what you actually meant.
Declaration theory = what it looked like you meant.
SA = both: appearance + reasonable reliance wins unless your mistake was
reasonable.
Policy reasons
•
•
Pure will theory would make contracts too easy to escape.
Pure declaration theory would force people into contracts they never intended.
1.6 Cornerstones of the law of contract
•
Freedom of contract.
•
•
•
Sanctity of contract.
Good faith (uberrimae fidei in some contracts).
Constitutional values (fairness, equality, dignity) now limit freedom.
1.7 External influences
•
•
Constitution: indirect horizontal application (s 8(2)) – public policy now includes
constitutional values.
Consumer Protection Act 68 of 2008 (CPA): applies to consumer contracts; strikes
down unfair terms, gives cooling-off rights, protects against misleading conduct.
Past questions from your slides (memorise answers)
•
•
•
•
•
•
Why is the Law of Contract one of the most important branches of law?
Real right vs personal right vs personality right?
Name three contracts that are MORE than ordinary contracts.
What is needed for an agreement to become a contract?
Explain horizontal vs vertical application of the Constitution.
Indirect vs direct application?
Self-test
Write a 2-paragraph answer explaining the dual basis and apply it to a scenario where Party
A thinks he is buying a car but signs a lease.
CHAPTER 2: OFFER AND ACCEPTANCE (Unit 2, Theme 1)
2.1 Formation process
Contract formed when a valid offer is met by a valid acceptance that corresponds exactly
(mirror image rule).
2.2 The Offer – requirements & termination
An offer must be:
•
•
•
Firm (clear intention to be bound on acceptance).
Complete (all essential terms present).
Clear and certain (reasonable person must understand).
Distinctions (highly testable)
•
•
•
Offer vs invitation to treat (invitation to negotiate):
o Advertisements, price lists, shop displays = usually invitations to treat.
o Exception: unilateral contracts (Carlill v Carbolic Smoke Ball – reward or “use
our product and if you get flu we pay £100”).
Auctions: bid = offer; hammer fall = acceptance.
Tenders: tender = offer; acceptance by letter of award.
Termination of offer (must list all 6)
1.
2.
3.
4.
5.
6.
Rejection (express or implied).
Counter-offer (destroys original offer).
Death or incapacity of offeror/offeree.
Effluxion of time (if stated or reasonable time passes).
Revocation (must reach offeree before acceptance).
Acceptance (offer lapses).
2.3 Acceptance
Requirements:
•
•
•
•
By the offeree only.
Unqualified (must exactly match the offer).
Conscious and deliberate.
In the prescribed manner (if any).
When does acceptance take effect? (the moment of contract formation – tested every
year)
•
•
•
General rule: Information / Reception theory – acceptance must reach the offeror (or
his agent).
Exception: Expedition / Postal theory – if post is a reasonable or contemplated
method, acceptance is effective when posted (even if letter is lost).
Electronic transactions (ECTA): reception theory unless parties agree otherwise.
Criticism of postal rule: unfair to offeror; outdated in digital age.
Key cases
•
•
Carlill v Carbolic Smoke Ball – unilateral offer; acceptance by performance.
Bloom v American Swiss Watch – reward offer; acceptance by performing the act.
2.4 Breaking off negotiations
No general duty to negotiate in good faith, but pre-contractual liability possible under delict or
enrichment if one party induces reasonable reliance and then withdraws unfairly.
2.5 Pacta de contrahendo
•
•
Option contract: irrevocable offer + some consideration or unilateral declaration.
Right of pre-emption (preference contract): right to be offered the property first.
Self-test example
A advertises a car for R150 000. B emails “I accept”. A then says “sorry, sold”. Is there a
contract? (No – advertisement was invitation to treat; B’s email was the offer.)
CHAPTER 3: ABSENCE OF CONSENSUS – MISTAKE (Unit
2, Themes 2 & 3)
Classification table (memorise this table – lecturers draw it)
Type of
Mistake
Description
Effect on Contract
Approach Used
Unilateral
One party mistaken
May be voidable if
iustus error
Objective + iustus error
Mutual
Each party has different
understanding
No consensus → no
contract
Objective test
Common
Both parties share the
same mistake
Usually void if
material
Objective (but
rectification possible)
Material vs non-material mistake
•
•
Material (goes to the root) → can vitiate consensus.
Non-material → contract stands.
Iustus error doctrine (reasonable mistake)
A unilateral mistake will prevent contract formation only if:
1. The mistake was material.
2. The mistake was reasonable (iustus).
3. The other party knew or should have known of the mistake (or cannot rely on
appearance).
Reconciliation of theories (Sonap Petroleum case – leading authority)
Objective appearance creates a prima facie contract, but the mistaken party can escape if
their error was reasonable and the other party cannot claim reasonable reliance.
Rectification
Available for common mistake in recording the agreement. Court rewrites the document to
reflect true intention.
Simplified explanation
If you sign something thinking it is X but it is Y:
•
•
•
•
Was your mistake reasonable?
Did the other party know or should they have known?
If yes → no contract (iustus error).
If no → contract stands (reliance protected).
Key case
Sonap Petroleum v Pappadogianis – classic iustus error application.
Past question style
“A believes he is signing a guarantee but it is actually a suretyship. The bank knew he was
confused. Is there a contract?” → Apply iustus error + reliance.
CHAPTER 4: IMPROPERLY OBTAINED CONSENSUS (Unit
3, Theme 1)
4.1 Overview
Consensus exists but is defective because it was obtained improperly → contract is
voidable (not void).
4.2 Misrepresentation
•
•
•
False statement of fact (not opinion or puff).
Induces the contract (causative).
Can be fraudulent, negligent, or innocent.
Silence as misrepresentation
Only if there is a duty to disclose (e.g. uberrimae fidei contracts, facts that change the
nature of the deal).
Remedies
•
•
Rescission (cancel + restitutio in integrum).
Damages (delictual if fraudulent/negligent).
Distinction from terms: misrepresentation is pre-contractual; terms are part of the contract.
4.3 Duress
Requirements:
•
•
•
•
Threat of unlawful harm.
Imminent.
Reasonable fear (objective + subjective test).
Causative.
Third-party duress also vitiates if the other contracting party knew.
4.4 Undue influence
•
•
Relationship of trust/confidence.
Improper pressure that overpowers the will.
4.5 Commercial bribery
New ground – secret commission that corrupts consent.
CPA influence
Right to fair and honest dealing; misleading conduct = prohibited.
Key distinction (testable)
•
Mistake = no consensus at all.
•
Misrepresentation/duress/undue influence = consensus exists but defective →
voidable.
Remedies summary
Rescission restores parties to pre-contract position + possible damages.
CHAPTER 5: CONTRACTUAL CAPACITY (Unit 3,
Theme 2 & Cont.)
Definition
Ability to incur rights and duties through contracts.
Natural persons
•
•
Major (18+ or emancipated): full capacity.
Minor (under 18): limited capacity. Contracts are voidable at minor’s option unless:
o Necessaries (food, shelter, education, medical).
o Emancipated or assisted by guardian.
o Ratified on reaching majority.
Married persons (in community of property): both spouses must consent for major
transactions.
Insolvents: can contract but estate is controlled.
Prodigals: court-declared, contracts voidable.
Juristic persons
•
•
Companies: full capacity (Companies Act s 20).
Close corporations, trusts: similar.
State: full capacity but special statutory rules.
Consequence
•
•
Lack of capacity → contract void (some cases) or voidable at option of the
incapacitated party.
Minor can choose to enforce or repudiate even if the other party performed.
Example
Minor buys a luxury watch on credit → voidable. Minor buys food → binding as necessaries.
Chapter 6: Formalities
1. The General Rule: Informality
As a general rule in South African law, no formalities are required to create a valid contract.
Parties are free to express their intention in any form they choose — orally, in writing, or through
conduct — provided the other requirements for contractual validity are satisfied.
2. Formalities Prescribed by Law (Statutory Formalities)
The law creates specific exceptions where particular forms are mandatory for a contract to be
valid or enforceable. These requirements exist primarily to promote legal certainty and prevent
fraud.
Key statutory exceptions include:
•
Alienation of Land (Alienation of Land Act 68 of 1981): Any sale, exchange, or donation
of land must be contained in a written deed of alienation and signed by the parties or
their agents acting with written authority. Failure to comply renders the contract void.
•
Suretyship (General Law Amendment Act 50 of 1956): A contract of suretyship must be
in writing and signed by the surety (or on their behalf). The creditor’s signature is not
required.
•
Executory Donations: An executory (future) donation must be in writing and signed by
the donor or an authorised agent. However, an oral donation becomes valid and binding
once completed by delivery.
•
Antenuptial Contracts: Valid between the spouses even if oral, but to bind third
parties, they must be notarially executed and registered in the Deeds Office.
•
Long Leases of Land: Leases longer than ten years must generally be registered
against the title deed to be effective against third parties. Leases over 20 years are
subject to stricter rules.
•
Electronic Contracts (Electronic Communications and Transactions Act – ECTA):
Section 12 of the ECTA provides that data messages can satisfy writing requirements
and electronic signatures can fulfil signature requirements. Important limitation:
ECTA does not apply to the alienation of land or long-term leases (over 20 years).
3. Formalities Stipulated by the Parties (Contractual Formalities)
Parties may themselves agree that their contract will only become binding once certain
formalities (usually reduction to writing and signature) are fulfilled.
•
Intent Inquiry: When parties agree to reduce an oral agreement to writing, the court
asks whether the writing was intended: (a) merely as proof/facilitation (contract valid
immediately upon oral agreement), or (b) as a constitutive requirement for validity (no
contract until signed). Presumption: In case of doubt, the law presumes the writing was
for proof only (the contract is immediately binding).
4. The Shifren Principle (Non-Variation Clauses)
A non-variation clause provides that no variation, addition, or amendment to the contract is
valid unless it is in writing and signed by the parties.
•
Rule: Such clauses are valid and enforceable and not contrary to public policy.
Rationale: Party autonomy (parties may voluntarily limit their own future freedom to
vary the contract orally) and commercial certainty.
•
Entrenchment: For full effectiveness, the non-variation clause must entrench itself —
i.e., it cannot be varied orally either.
•
Non-Cancellation Clauses: A non-variation clause alone does not prevent informal
(oral) consensual cancellation. To require writing for cancellation, the contract must
contain a non-cancellation clause coupled with a non-variation clause.
•
Non-Waiver Clauses: These prevent a party’s “indulgence” (e.g., accepting late
payment on one occasion) from being interpreted as a permanent waiver of rights.
5. Limitations and Exceptions to the Shifren Principle
Courts interpret non-variation clauses restrictively to avoid injustice.
•
Cancellation vs Variation: A non-variation clause generally does not prevent informal
cancellation, as cancellation extinguishes the contract rather than varying its terms.
•
Waiver of Accrued Rights: Waiving a right that has already accrued (e.g., the right to
sue for a specific past breach or accepting one late payment) is generally not regarded
as a variation of the contract and is therefore unaffected by the clause.
•
Public Policy / Abuse of Process: A court may refuse to enforce a non-variation clause
if enforcement would be contrary to public policy or constitute an abuse of legal process
(see Nyandeni Local Municipality v Hlazo).
•
Estoppel: While theoretically possible, estoppel is difficult to establish because it is
usually unreasonable for a party to rely on an oral representation when the written
contract expressly prohibits it.
Chapter 7: Legality
1. The Nature of Legality
A contract is illegal (and therefore invalid) if its conclusion, performance, or object conflicts
with statute, common law, or public policy (boni mores).
2. Public Policy and the Constitution
Since 1994, public policy is primarily determined with reference to Constitutional values,
including the Bill of Rights and the value of Ubuntu.
•
Pacta Sunt Servanda: The principle that agreements must be honoured remains a core
public interest. However, it is no longer regarded as the single most important principle
and must be balanced against values of fairness and justice.
•
Fairness Test (Barkhuizen v Napier): Courts apply a two-stage inquiry when assessing
contractual terms:
1. Is the clause itself manifestly unreasonable?
2. If the clause is reasonable in the abstract, should it nevertheless not be
enforced in the specific circumstances of the case (e.g., where compliance was
prevented)?
•
Application of the Constitution:
o
Indirect application: The Bill of Rights influences private law through the
development of public policy (s 39(2) of the Constitution).
o
Direct application: In exceptional cases (e.g., AB v Pridwin Preparatory School),
the Constitution may apply directly to private contracts where a fundamental
right is directly infringed.
A court will not refuse to enforce a term merely because it appears “unfair” subjectively; it must
be so unfair or unreasonable that it offends public policy.
3. Consequences of Illegality
•
Ex Turpi Causa Rule: “No action arises from a base/illegal cause.” An illegal contract is
void and cannot be enforced by either party. This rule is absolute and cannot be
relaxed.
•
Par Delictum Rule: Where both parties are equally guilty (in pari delicto), the party in
possession of the performance is in the stronger position — the court will not assist the
other party to recover what was given. However, courts may relax this rule in appropriate
cases to achieve simple justice between the parties.
4. Restraint of Trade Agreements
An agreement restraining a person from carrying on a trade, profession, or business in a
particular area or for a particular time.
•
General Rule (Magna Alloys): Restraints of trade are prima facie valid and
enforceable unless the party wishing to escape the restraint (the “restraint denier”)
proves that it is unreasonable and thus contrary to public policy.
•
Onus: Lies on the restraint denier.
•
Basson v Chilwan Reasonableness Test (four-stage inquiry):
1. Does the party seeking to enforce the restraint have a protectable interest (e.g.,
trade secrets, confidential information, or customer goodwill)?
2. Is that interest threatened by the other party’s conduct?
3. Does the protectable interest outweigh the other party’s interest in being
economically active? (Is the restraint wider than reasonably necessary in
duration, geographical area, or scope?)
4. Is there any other aspect of public policy that requires the restraint to be
rejected or maintained?
Chapter 8: Possibility and Certainty
1. Possibility of Performance
The maxim impossibilium nulla obligatio est applies: No obligation arises from an impossible
promise.
•
Objective vs Subjective Impossibility: Only objective impossibility (no one in the
world can perform) voids the contract. Subjective impossibility (performance is merely
difficult or impossible for this particular debtor) does not invalidate the contract.
•
Initial vs Supervening Impossibility:
o
Initial impossibility (exists at the time the contract is concluded) renders the
contract void.
o
Supervening impossibility (arises after conclusion) generally terminates the
obligation. However, if the debtor is at fault for the impossibility, it may
constitute a breach of contract.
2. Certainty of Content
The terms of a contract must be definite or determinable. Vague or uncertain terms may
render the contract void.
•
Favouring Validity: The principle ut res magis valeat quam pereat (“rather that the thing
should be valid than perish”) guides courts to prefer an interpretation that upholds the
contract.
•
Id Certum Est Quod Certum Reddi Potest: Something is certain if it can be made
certain.
Mechanisms that render terms certain:
•
Escalation Clauses: Automatic increases according to a clear formula (e.g., 10%
annual rent increase or CPI-linked).
•
External Standards: Reference to an objective source (e.g., “the price on the supplier’s
latest official price list”).
•
Third-Party Determination: A third party may determine the price or performance,
provided they act reasonably (arbitrio bono viri – as a reasonable person would).
•
One Party’s Discretion: A party may be given discretion to determine the other party’s
performance (e.g., a bank adjusting interest rates), provided it is exercised reasonably.
However, a discretion allowing a party to determine its own performance (condicio si
voluero – “if I wish”) is generally void for uncertainty.
Chapter 9: Parties to Contracts
1. Multiplicity of Parties
While most contracts involve one debtor and one creditor, multiplicity is possible.
•
Simple Joint Liability: Each debtor is liable only for their pro rata (proportionate) share
of the debt.
•
Joint and Several Liability (In Solidum): Each debtor is liable for the entire debt. The
creditor may sue any one (or more) of them for the full amount. (Most common in
practice.)
•
Collective Joint Liability: All debtors must perform together as a single unit (e.g., a
musical quartet performing a concert).
2. Third Parties and Stipulatio Alteri (Contract for the Benefit of a Third Party)
Privity of Contract: Generally, only the parties to the contract acquire rights and incur duties
under it.
•
Stipulatio Alteri: Two parties (the stipulans and promittens) may conclude a contract in
terms of which a third party (beneficiary) is to receive a benefit.
o
The third party acquires no rights until they accept the benefit.
o
Before acceptance, the original parties (stipulans and promittens) may still
cancel or amend the benefit.
o
Once the third party accepts, the benefit cannot be cancelled or varied without
their consent.
3. Agency (Representation)
Concept: An agent performs a juristic act on behalf of a principal.
•
Legal Effect: If the agent acts within the scope of their actual or apparent authority, a
direct contractual relationship is created between the principal and the third party. The
agent “drops out” and has no rights or duties under the contract.
•
Pre-incorporation Contracts (Companies Act): A person may conclude a contract on
behalf of a company that has not yet been incorporated. Once the company is
incorporated, it must ratify the contract for it to become binding on the company
(subject to the statutory requirements of the Companies Act).
Key Study Tips for These Chapters:
•
Formalities: Distinguish clearly between statutory, contractual, and evidentiary
formalities. Master the Shifren limitations (cancellation, waiver, public policy).
•
Legality: Always link public policy to the Constitution. Know the Basson test and
Barkhuizen two-stage test by heart.
•
Possibility & Certainty: Focus on objective vs subjective and initial vs supervening
impossibility. Remember the mechanisms that cure uncertainty.
•
Parties: Understand privity exceptions (stipulatio alteri) and the consequences of
different forms of joint liability.
Chapter 10: Obligations and Terms
This chapter examines the legal bond created by a contract and the specific rules governing its
"content."
1. The Concept and Nature of an Obligation
An obligation is a legal bond (vinculum juris) between two or more persons. It consists of:
•
A duty on the part of the debtor to perform (give, do, or refrain from doing something).
•
A corresponding personal right (ius in personam) on the part of the creditor to claim
performance.
Unlike real rights (enforceable against the world), personal rights under an obligation are
enforceable only against the specific debtor. Obligations create a personal legal relationship.
2. Classification of Obligations
Civil vs. Natural vs. Moral Obligations:
•
Civil obligations: Fully enforceable by court action.
•
Natural obligations: Valid in law but not enforceable by court action (e.g., a prescribed
debt, a minor’s unassisted contract, or a gambling debt). Performance made cannot be
reclaimed as “unowed,” and they can sometimes be set off against civil debts.
•
Moral obligations: Have no legal significance (e.g., a casual promise to meet for
coffee).
Reciprocal Obligations: Most contracts are reciprocal. Performance by one party is owed in
direct exchange for performance by the other. Example: In a contract of sale, the seller’s duty to
deliver the goods is reciprocal to the buyer’s duty to pay the price. Non-performance by one
party may allow the other to withhold their own performance via the exceptio non adimpleti
contractus.
Simple, Alternative, Facultative, and Generic Obligations:
•
Simple: A specific, fixed performance (e.g., delivery of a particular car with registration
CA 123456).
•
Alternative: The debtor must perform one of two or more specified acts; the choice
usually belongs to the debtor unless otherwise agreed (e.g., delivery of Cow Annabel or
Cow Bluebell). The creditor can claim whichever item is chosen.
•
Facultative: The debtor owes one specific primary performance but has the power to
substitute it with another specified act. Crucial difference: The creditor can only ever
claim the primary performance (unlike alternative obligations).
•
Generic: Performance is defined by reference to a class or genus rather than a specific
item (e.g., “1,000 barrels of grade A oil”). The debtor bears the risk of the genus until
delivery of specific items.
3. The “Triad” of Contractual Terms
Contracts consist of three categories of terms:
•
Essentialia: The minimum terms required to identify the type of contract and give it legal
character. Example: In a sale, the object (thing sold) and the price.
•
Naturalia: Terms automatically included by operation of law (ex lege) unless the parties
expressly or impliedly exclude them. Example: The seller’s warranty against latent
defects in a contract of sale.
•
Incidentalia (or accidentalia): Additional, unique terms agreed by the parties to modify,
supplement, or vary the naturalia or common law rules. Example: A “non-variation”
clause requiring all changes to be in writing.
4. Conditions
Conditions are terms that make the existence, operation, or continuation of the obligation(s)
dependent on an uncertain future event. They introduce contingency and differ from ordinary
terms/obligations (see detailed explanation below).
•
Suspensive Condition: The obligation is suspended (does not become enforceable or
the contract does not come into existence) until the uncertain future event occurs. If the
condition fails, no obligation arises. Example: “I will buy this house if I obtain a bank
loan.”
•
Resolutive Condition: The obligation exists and is immediately enforceable, but it
terminates if the uncertain future event occurs. Example: “I will pay you R5,000 a month
until you find a job.”
Key Distinction from Time Clauses or Ordinary Terms: A time clause (e.g., performance due
on a fixed date) is an ordinary term imposing an obligation, not a true condition. Non-fulfilment
of a suspensive condition prevents the contract from coming into effect, whereas breach of an
ordinary term triggers remedies like specific performance or damages.
Chapter 11: Interpretation of Contracts
Once the terms are identified, courts must determine their meaning.
1. The Unitary Process of Interpretation
South African law follows a unitary process of interpretation. Courts consider the text (the
actual words used), the context (the factual matrix, surrounding circumstances, and
background), and the purpose of the contract simultaneously from the outset. This has
replaced the older staged approach (where context was only considered if the text was
ambiguous).
2. The Parol Evidence Rule (Integration and Interpretation Rules)
•
Integration Rule: If a written document was intended as the final and complete version
of the agreement (the “whole contract”), extrinsic (“outside”) evidence—such as prior
emails, drafts, or verbal promises—cannot be used to contradict, add to, or vary its
terms.
•
Interpretation Rule: Extrinsic evidence may still be admissible to explain the context or
purpose, but not to prove a party’s hidden subjective intention that contradicts the
written text.
3. Canons of Construction (Tie-Breaker Rules)
When ambiguity remains after applying the unitary process, courts use these interpretive
presumptions:
•
Contra Proferentem: An ambiguous clause is interpreted against the party who drafted
or proposed it (often the stronger party, such as a company or insurer).
•
Ut res magis valeat quam pereat (“rather that the thing should have effect than
perish”): Courts prefer an interpretation that gives the contract legal effect and validity
over one that renders it void or ineffective.
•
Eiusdem generis (“of the same kind”): General words that follow specific words are
limited to things of the same class or genus. Example: “Cats, dogs, and other animals”
would normally mean other household pets, not lions or exotic wildlife.
Chapter 12: Forms of Breach
A breach occurs when a party, without lawful excuse, fails to honour their contractual
obligations. The main forms are:
1. Mora Debitoris (Late Performance by Debtor / Negative Malperformance): The
debtor fails to perform on time when performance is still possible.
o
Requirements: Performance must be due and possible; the delay must be
wrongful.
o
Mora ex re: Automatic if a fixed date or time is stipulated in the contract.
o
Mora ex persona: Arises only after the creditor makes a formal demand
(interpellatio) setting a reasonable deadline.
2. Mora Creditoris (Late Performance by Creditor): The creditor fails to cooperate or
provide the necessary opportunity for the debtor to perform. Example: Hiring a painter
but locking the house and going on holiday, preventing access.
3. Positive Malperformance: The debtor performs on time, but the performance is
defective, incomplete, or does not meet the required standard. Example: A painter
finishes on time but uses the wrong colour or damages the floor; or a builder completes
the house but the roof leaks.
4. Repudiation (Anticipatory Breach): A party manifests an unequivocal intention (by
words or conduct) not to be bound by the contract anymore, before performance is due.
Example: The seller tells the buyer, “I am selling this item to someone else instead,” or
unjustifiably claims the contract is cancelled.
5. Prevention of Performance: A party, through their own fault, makes performance
impossible. Example: Selling a house but deliberately burning it down before transfer.
Chapter 13: Remedies for Breach
Remedies aim to either enforce the contract or undo its effects. The innocent party generally
has an election to uphold (enforce) or cancel (rescind) the contract. This election is usually
final once made.
1. Specific Performance (Primary Remedy)
The court orders the defaulting party to perform exactly as promised (e.g., deliver the car or pay
the money). It is the default remedy unless it would be unjust.
•
In reciprocal contracts, the breaching party may raise the exceptio non adimpleti
contractus (defence of non-performance) if the innocent party has not yet performed
their side.
2. Cancellation (Rescission – Extraordinary Remedy)
Available only if:
•
The breach is material (goes to the root of the contract), or
•
The contract contains a lex commissoria (an express cancellation clause allowing
cancellation for that type of breach).
Upon cancellation, restitution must occur: Both parties return what they received to restore the
pre-contractual position (e.g., buyer returns the car; seller returns the purchase price).
3. Damages (Compensation)
The purpose is to place the innocent party in the position they would have been in had the
contract been properly performed (positive interest or expectation interest). This includes:
•
Expectation losses (lost profits).
•
Reliance losses (wasted expenses incurred in reliance on the contract).
Example: A builder who spent R30,000 on materials (reliance) and would have earned R10,000
profit (expectation) may claim R40,000.
•
Legal Causation / Remoteness: Damages must be either general (naturally flowing
from the breach) or special (foreseeable by both parties at the time of contracting, per
the Hadley v Baxendale principles adapted in SA law).
•
Mitigation Rule: The innocent party must take reasonable steps to minimise their loss;
they cannot allow damages to accumulate unnecessarily.
4. Penalty Clauses
Parties may agree in advance on a fixed “penalty” payable on breach. Governed by the
Conventional Penalties Act. Courts have the power to reduce the penalty if it is out of
proportion to the actual prejudice suffered by the innocent party.
Answers to Your Specific Questions
1. What is the threefold inquiry for the iustus error doctrine?
The iustus error (justifiable/reasonable error) doctrine serves as a corrective to the objective
approach to contract formation (declaration theory). It allows a party (the “contract denier”) to
escape an apparent contract if their mistake prevented true consensus and the mistake is both
material (goes to the heart/essentialia of the contract) and reasonable (iustus).
The classic threefold inquiry (often drawn from case law) is:
1. Was there a misrepresentation (or conduct creating a false impression) as to one
party’s intention?
2. Who made that representation (or created the impression)?
3. Was the other party actually misled by it, and would a reasonable person in the position
of the other party have been misled?
In practice, a material mistake is often considered reasonable where:
•
It was induced by the other party’s misrepresentation;
•
The mistaken party is not at fault (blameless); or
•
The mistaken party did not create a reasonable belief in the mind of the other party that
consensus existed.
The onus lies on the contract denier to prove both materiality and reasonableness. If
successful, the contract is void (no consensus).
2. How does the Consumer Protection Act (CPA) affect freedom of contract?
The common law principle of freedom of contract allows parties to enter agreements on any
terms they choose (including “unfair” ones), provided there is consensus and no illegality. The
CPA (68 of 2008) significantly limits this freedom, particularly in consumer-supplier
relationships, to promote fairness, transparency, and protection for consumers who often have
weaker bargaining power.
Key effects include:
•
Procedural and substantive fairness requirements: Contracts must be in plain
language; certain unfair, unconscionable, or one-sided terms are prohibited or declared
void.
•
Implied warranties and consumer rights: E.g., right to safe, good-quality goods (s 55),
implied warranty of quality (s 56), and strict liability for harm caused by defective goods
(s 61).
•
Restrictions on exemption clauses, cancellation rights, and enforcement processes.
•
Court powers: Courts can review contracts, declare terms unfair, and make equitable
orders (including amending or severing terms).
•
Impact on suppliers: Suppliers face more prescribed formalities, disclosure duties,
and limitations on what they can contract out of. This shifts the balance away from pure
freedom toward social justice and protection against unequal bargaining power.
While the CPA does not abolish freedom of contract entirely, it qualifies it substantially in the
consumer context, making some common-law agreements unenforceable if they contravene
the Act.
3. Explain the difference between a condition and a term (in more depth)
In South African contract law:
•
A term (or stipulation/obligation) is a provision that imposes a contractual duty on a
party to act or refrain from acting in a particular way. Breach of a term gives rise to
ordinary contractual remedies (specific performance, damages, or cancellation if
material or permitted by a lex commissoria).
•
A condition, by contrast, is not an obligation but a contingency or qualification that
makes the existence, operation, or continuation of the contract (or specific obligations)
dependent on an uncertain future event. No action lies to “enforce” a condition itself— it
is either fulfilled or not fulfilled.
Key Practical Differences:
•
Effect of non-fulfilment: If a suspensive condition is not fulfilled, the contract (or the
relevant obligations) never comes into existence. If a resolutive condition is fulfilled,
the contract terminates. Breach of a term, however, leaves the contract intact but
triggers remedies.
•
Nature: Terms create enforceable duties; conditions introduce uncertainty or a “what if”
scenario.
•
Time clauses vs conditions: A fixed performance date is usually a term (breach =
mora), not a condition.
•
Example: “Paint the house by 30 June” = term (breach if not done). “I will paint the
house if it does not rain on 30 June” = suspensive condition affecting the obligation.
Courts carefully distinguish the two because misclassifying a provision can change whether the
contract ever binds the parties or merely gives rise to breach remedies. Parties should draft
clearly to avoid disputes over classification.
This unified guide retains every piece of information from the sources you provided while
organising it coherently. Focus on the distinctions (civil/natural, alternative/facultative,
essentialia/naturalia/incidentalia, forms of breach, and remedies) and the policy tensions
(freedom of contract vs. CPA protections; objective vs. subjective approaches via iustus error).
Review the examples thoroughly—they illustrate application well. Good luck with your test on
May 4th! If you need summaries, flashcards, or practice questions, let me know.