Understanding Contract Law Terms and Consideration
Contract law fundamentals require valid consideration to form a legally binding agreement. Consideration represents the exchange of something valuable between parties, making it a crucial element in contract law UK.
The doctrine of consideration follows several key principles that determine its validity. First, consideration must be sufficient but need not be adequate, as established in Thomas v Thomas. This means the value exchanged doesn't need to be equal, but must have some legal value.
Definition: Consideration is something of value given by both parties that induces them to enter into the agreement.
Past consideration is not valid under contract law UK. This principle was demonstrated in Re McArdle, where work already completed before a promise was made could not serve as consideration. However, the implied assumpsit doctrine provides an exception when there was an implied understanding of future payment.
Example: If someone promises to pay for services already rendered, this would be past consideration and invalid. However, if there was an implied understanding of payment when the service was requested, it may be enforceable.
Consideration must move from the promisee, as established in Tweddle v Atkinson. Additionally, performing an existing duty generally cannot serve as consideration unless there is some extra benefit or element involved, as seen in Williams v Roffey Bros.