📄Contracts Unit 2 – Contract Formation – Offer and Acceptance

Contract formation hinges on offer and acceptance. An offer is a proposal to enter into a contract, while acceptance is an unequivocal assent to the terms. Both require clear communication, intention to be legally bound, and compliance with specific rules. Offers can be express or implied, bilateral or unilateral. They must be clear, definite, and communicated to the offeree. Acceptance must mirror the offer's terms, be timely, and follow prescribed methods. Special cases like auctions and preliminary agreements have unique rules.

Key Concepts

  • Offer a proposal to enter into a contract, creating the power of acceptance in the offeree
  • Acceptance an unequivocal assent to the terms of an offer, creating a binding contract
  • Consideration something of value exchanged by both parties, necessary for a contract to be enforceable
  • Meeting of the minds both parties must have a common understanding of the essential terms of the contract
  • Intention to create legal relations parties must intend to be legally bound by the agreement
  • Invitation to treat a mere declaration of willingness to enter into negotiations, not an offer (advertisements, price quotations)
  • Counter-offer a response to an offer that changes the terms, effectively rejecting the original offer and making a new offer

Elements of a Valid Offer

  • Communication the offer must be communicated to the offeree
  • Clear and definite terms the offer must be sufficiently clear and definite for a contract to be formed
    • Essential terms (price, subject matter, parties) must be included or determinable
  • Intention to be bound the offeror must intend to be legally bound upon acceptance
  • Addressed to a specific person or group offers cannot be made to the world at large (with some exceptions)
  • Differentiated from an invitation to treat must be distinguished from a mere invitation to negotiate or submit offers
  • Revocable until accepted offers are generally revocable until accepted, unless they are option contracts or firm offers under the UCC
  • Lapse after a reasonable time offers lapse if not accepted within a reasonable time, depending on the circumstances

Types of Offers

  • Express offers clearly stated orally or in writing
  • Implied offers inferred from the conduct of the parties or the circumstances
  • Bilateral offers propose a promise for a promise, requiring a return promise to accept (typical in most contracts)
  • Unilateral offers propose a promise for an act, requiring performance to accept (rewards, contests)
    • Generally cannot be revoked once performance has begun
  • Option contracts irrevocable offers, usually supported by separate consideration (option to purchase real estate)
  • Firm offers under the UCC irrevocable offers by merchants, in a signed writing, for up to 3 months (sale of goods)
  • Tenders offers to multiple parties, with acceptance by the highest bidder or most suitable candidate (construction contracts)

Communication of Offers

  • Effective upon receipt offers are effective only when received by the offeree, not when sent by the offeror
  • Means of communication any means of communication can be used (oral, written, electronic), as long as it is reasonable under the circumstances
  • Prescribed method if the offeror prescribes a specific method of acceptance, the offer can only be accepted by that method
  • Indirect communication offers can be communicated through an authorized third party (brokers, agents)
  • Rejected if not properly communicated offers are considered rejected if not communicated through a proper means
  • Death of offeror or offeree an offer is terminated upon the death of either party before acceptance
  • Incapacity of offeror an offer is void if the offeror lacks contractual capacity (minors, mentally ill)

Termination of Offers

  • Revocation by the offeror before acceptance, unless it is an irrevocable offer
    • Effective upon receipt by the offeree
  • Rejection by the offeree, either expressly or by making a counter-offer
  • Lapse of time after a reasonable time, depending on the circumstances
  • Death or incapacity of either party before acceptance
  • Destruction of subject matter if the subject matter of the contract is destroyed before acceptance
  • Supervening illegality if the contract becomes illegal before acceptance (change in law)
  • Failure of a condition if the offer is conditional and the condition is not satisfied

Elements of Acceptance

  • Unequivocal assent to the terms of the offer, without any changes or conditions
  • Communicated to the offeror acceptance must be communicated to be effective, with some exceptions
  • Intention to be bound the offeree must intend to be legally bound by the contract
  • Compliance with the method of acceptance if the offer prescribes a specific method, it must be followed
  • Timeliness acceptance must occur before the offer lapses or is terminated
  • By a person with contractual capacity minors and mentally ill persons generally cannot enter into contracts
  • Mirror image rule acceptance must mirror the terms of the offer (UCC 2-207 is an exception for sale of goods)

Methods of Acceptance

  • Express acceptance clearly stated orally or in writing
  • Implied acceptance inferred from the conduct of the offeree (performing the requested act)
  • Silence generally not acceptance, unless the parties have a prior course of dealing or the offeree takes the benefit of the offer
  • Performance of the requested act in unilateral contracts, performance constitutes acceptance
  • Acceptance by post the mailbox rule, acceptance is effective upon dispatch (with some exceptions)
    • Does not apply to instantaneous means of communication (phone, email)
  • Acceptance by electronic means follows the same rules as other forms of acceptance (receipt, dispatch)
  • Acceptance by conduct any act that indicates assent to the terms of the offer (shipping goods)

Special Cases and Exceptions

  • Battle of the forms (UCC 2-207) for sale of goods, additional or different terms in the acceptance become part of the contract unless they materially alter the offer
  • Auctions with reserve seller is not obligated to accept the highest bid
    • Auctions without reserve seller must accept the highest bid
  • Tenders offers to multiple parties, acceptance by the most suitable candidate
  • Preliminary agreements parties may agree to be bound by a preliminary agreement, with further terms to be negotiated
  • Agreements to agree generally not enforceable, as the terms are too indefinite
  • Mistake, misrepresentation, duress, undue influence, and unconscionability may make a contract voidable
  • Statute of Frauds certain types of contracts must be in writing to be enforceable (sale of land, contracts lasting more than one year)


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AP® and SAT® are trademarks registered by the College Board, which is not affiliated with, and does not endorse this website.