Parties are free to agree on whatever formalities they wish, but at most, commonly required formalities are writing and signature. |
It always depends on the intentions of the parties. |
3 possible scenarios can be distinguished: |
(1) the parties agree that their agreement will not be binding unless and until it is reduced to writing. |
(2) the parties require their contract to be reduced to writing simply to record their agreement. |
(3) the parties may have a contract that is partly verbal and partly in-writing. |
The Parties can impose Formalities for the Following: |
- valid formation (conclusion) of the contract. |
- valid variation (change of the terms after conclusion) of the contract by a non-variation clause. |
- valid waiver of rights (the relinquishing of rights) by a non-waiver clause. |
- valid cancellation (agreement terminating all obligations) of the contract by a non-cancellation clause. |
Variation of a Contract |
Parties can vary a contract informally. Sometimes they prescribe formalities for the variation of the contract. |
A non-variation clause unduly restricts the parties' freedom to change their minds. The parties themselves agreed to the non-variation clause and should be bound by it. |
The Shifren Principle |
Facts: Shifren leased property to SA Sentrale. Clause 11 forbade any cession or sub-letting of the premises without the written consent of Shifren. |
Legal Issue: was it possible impliedly to change clause 11 in the light of the non-variation clause (clause 19?) |
Court Held: |
- non-variation clauses are valid and enforceable in our law. |
- promotes certainty |
- does not limit freedom of contract but gives effect to it because the parties chose to include it in their contract. |
- accordingly, a failure to enforce the non-variation clause would undermine the principle of pacta sunt servanda. |
Limiting the Shifren Principle |
(a) Informal agreement is not a variation |
It may be possible to escape a non-variation clause if the informal conduct is not a variation, but some other type of transaction. For example - cancellation, waiver, pacta de non petendo |
(b) Estoppel |
Estoppel is a defence which may be used to prevent the other party from relying on the non-variation clause. |
However, the defence of estoppel will not succeed where parties have varied their contract by oral agreement. |
(c) Public Policy |
A non-variation clause may be unenforceable if it is against public policy. |
Fraud exists where a party deliberately leads the other party to believe that he will not enforce the written contract. |
Cancellation of a Contract |
Generally, parties can cancel a contract informal. |
The parties can, however, prescribe formalities for the cancellation of the contract, by way of a non-cancellation clause. |
A non-cancellation clause can be informally varied, unless the contract also contains a non-variation clause. |
Impala Distributors v Taunus Chemical Manufacturing Co (Pty) Ltd 1975 (3) SA 273 (T) |
court held: if it wasn't for the non-variation clause the parties would have been free vary the non-cancellation clause informally by dropping the requirement of writing. |
Non-Waiver Clause |
A waiver is a deliberate abandonment, or surrender of an existing legal right by the right holder, acting with full knowledge of that right. Waiver can be express or tacit (by conduct). |
If the conduct amounts to a waiver instead of a variation, the non-variation clause will not apply to it. It is, however, difficult to distinguish between these two concepts. |
The main difference between a waiver and a variation is that: |
- a waiver relates to the rights that have already accrued (ie past obligations), whereas; |
- a variation changes the future obligations of the parties. |