A CONTRACT - a legally enforceable agreement between two or more parties
There must be an agreement made as a result of an offer & unequivocal acceptance of that offer
Either the contract must be under seal or there must be consideration
There must be an intention to create legal relations
Both parties must have the capacity to contract
There must be genuine consent to the terms by all parties to the contract
The terms of the contract must be legal & capable of performance
A void contract is not a contract at all
Its an agreement without legal effect
Usually for a minor for supply of goods other than necessity
Where the law allows one of the parties to withdraw if they wish
Remains valid until/unless innocent party chooses to terminate it
Usually for a minor
Or if induced by undue influence/mispresentation
A valid contract that cannot be enforced by courts due to lack of legal evidence ie. Written evidence
If deemed unenforceable then either party cannot compel other side to do so
The first essential of a valid contract
An offer exists where the offeror undertakes to be contractually bound if the offeree makes a proper acceptance. It
is a definite promise to be bound on certain specific terms.
The terms of an offer must be clear, certain & complete
It cannot be vague
 The offer must be communicated to the other party
 Can be communicated to a person, group or public at large
 The offer must be made by written, spoken or inferred by conduct
 Letter, phone, fax, or any means which is appropriate & reasonable in circumstances
 The offer must be intended as such before a contract can arise
 If it is not with a view to create legal relations
An offer is NOT: The answer to a question or supply of information
 Invitation to treat
 An invitation to another person to make an offer
 An invitation to treat cannot be accepted
 To advertise goods or display goods
 Statement of intention
 If a person states they intend to perform some act & they don’t
 Ie. Father states his son will be beneficiary to estate doesn’t form a contract
 An option
 The right to buy / sell something at a specified price
 By revocation before valid acceptance
 The offeror can revoke / withdraw at any time, even within specified time frame
 Lapse of time
 Will terminate at the end of a specified time
 If no time, then what is considered reasonable time
 Rejection or counter offer
 If outright rejection is communicated
 A rejected offer cannot subsequently be accepted
 Failure of express or implied condition
 Death of offeror or offeree
Acceptance may be oral, written or implied by conduct
 Dispatching goods in response to offer
 Carbolic smokeball, by using the smokeball
Acceptance must be clear & unqualified & must match offer exactly
 Acceptance must be communicated to & received by offeror
 Otherwise no enforceable contract exists
 Acceptance must be communicated by the offeree, or by someone with their authority, to the offeror
 The offeror may expressly or impliedly stipulate the method of acceptance
 Unless offeror states this is only method of acceptance they may accept other forms of acceptance as long as
offeror suffers no disadvantage
 Offeree / agent must communicate acceptance to offeror / agent EXCEPT: Where performance of an act or the conduct of a person is deemed to constitute acceptance.
 A ‘unilateral contract’ may be established whereby offer includes a term providing that complete
performance or conduct by the offeree will constitute complete acceptance. No need for advance notice
of acceptance.
 Where acceptance is made by post
 An offer effect if & when it is received. Acceptance by letter takes effect when it is posted.
Consideration is required for all enforceable contracts, except deeds under seal.
Some right, interest, profit or benefit accruing to the one party or some forbearance, detriment, loss or
responsibility given, suffered or undertaken by the other.
 Consideration can consist of doing something, refraining from doing something or making a promise in return for
the other party doing any of the above.
 If there is no consideration the agreement is unenforceable unless it is under seal or unless the principle of
promissory estoppel applies.
Consideration must be of some value but need not be adequate
 Anything of value which contributes to the bargain made is recognised in law as good consideration. It can
money, land, goods, services or any undertaking which confers a benefit on one party or represents a loss
to the other
Existing Legal obligation
 Performance of an existing legal obligation imposed by statute is no consideration for a promise. However,
of some extra service is given then that is sufficient consideration
Consideration mist be provided by the promise
 Consideration is the price of a promise, so a person can only enforce a promise if they themselves provided
the promise ie. Consideration must move from the promisee
Past Consideration – consideration must not have been provided prior to the agreement
 Is any act which has already been performed before a promise in return is given & is not sufficient to enforce
the promise
 Past consideration will support bills of exchange (cheques) since most of these are issued to pay existing
 Past consideration supports a later promise to pay for something done at the promisors request ie. That
consideration provided in the past will be good consideration when it was understood at the time there
would be payment in the future
Consideration must be given to enforce the waiving of a contractual obligation
Payment of part of a debt is not good consideration for a promise to write off the balance of a debt
 If a party to a contract waives existing right which it has under the contract,it is not legally bound by such a
waiver unless it has received consideration for it. This is because the waiver leads to a new agreement
which must be accompanied by consideration to make it enforceable.
 If the creditor accepts payment of a lesser sum in full settlement before the due date, the payment
discharges the whole debt
 If the creditor accepts anything different to which already entitled
 Ie. Goods instead of cash, even though the value of the goods may be less than the cash value
 If the creditor accepts part payment in full settlement from a third party. The creditor will have received
consideration from whom they had no previous claim
 If a group of creditors arrange that they will each accept part payment in full settlement. This will be binding
among themselves.
 If it can be enforced under PROMISSORY ESTOPPEL
An equitable exception to pinnels case
Equity mitigates the hardship that could be caused to person who relies on a promise that debt will not be enforced
in full.
Under the principle, where a person makes a promise, unsupported by consideration, to waive a debt or other
obligation, and where the promisee acts on this promise, the promisor is estopped (prevented) from retracting the
However, the principle prohibits promisors from insisting on their strict legal rights when it would be unjust to allow
them to do so.
 If the circumstances give rise to the promise to accept less change, then the promisors right to insist on full
payment can be revived
 It only applies to a promise of waiver which is voluntary
o It does not apply to a promise under threat “take €x or nothing !!”
 It is a shield not a sword, ie a defense, cannot be grounds for cause of action
The law upholds agreements, not only because of the consideration involved, but also because the parties intended
to create legal relations. Otherwise, there is no binding contract.
What matters is not whether the parties intended in their minds to be bound by what agreed to do, but the
inferences that a reasonable person would draw from their words, conduct or circumstances of negotiations
An express statement by the parties of their intention to create / not to create legal relations is conclusive
 “subject to contract” “agreement in principle” “provisional agreement” mean parties do not intend to be
legally bound prior to signing of a contract.
Where no express statement exists then courts have 3 principles:COMMERCIAL AGREEMENT
Presumed that both parties DID INTEND to create legal relations
The assumption that a commercial agreement is legally binding needs to expressly DENIED
An agreement between friends, family, husband & wife etc… normally presumed NOT TO create legal relations,
subject to contrary intention ( words, actions…)
Procedural agreements between trade unions & employers relating to a contract of employment are not usually
legally binding, despite their elaborate & very legal content. If the court finds that the parties intended to create
legal relations through such collective agreements it will hold the contract enforceable.