Restatement (Second) of Contracts

A contract is a promise or a set of promises for the breach of which the law gives a remedy, or the performance of which the law in some way recognizes as a duty.

An offer is the manifestation of willingness to enter into a bargain, so made as to justify another person in understanding that his assent to that bargain is invited and will conclude it.

(1) Except as stated in Subsection (2), the formation of a contract requires a bargain in which there is a manifestation of mutual assent to the exchange and a consideration. (2) Whether or not there is a bargain a contract may be formed under special rules applicable to formal contracts or under the rules stated in §§82-94.

A manifestation of willingness to enter into a bargain is not an offer if the person to whom it is addressed knows or has reason to know that the person making it does not intend to conclude a bargain until he has made a further manifestation of assent.

(1) An offer may invite or require acceptance to be made by an affirmative answer in words, or by performing or refraining from performing a specified act, or may empower the offeree to make a selection of terms in his acceptance. (2) Unless otherwise indicated by the language or the circumstances, an offer invites acceptance in any manner and by any medium reasonable in the circumstances.

(1) Even though a manifestation of intention is intended to be understood as an offer, it cannot be accepted so as to form a contract unless the terms of the contract are reasonably certain. (2) The terms of a contract are reasonably certain if they provide a basis for determining the existence of a breach and for giving an appropriate remedy. (3) The fact that one or more terms of a proposed bargain are left open or uncertain may show that a manifestation of intention is not intended to be understood as an offer or as an acceptance.

(1) The terms of a contract may be reasonably certain even though it empowers one or both parties to make a selection of terms in the course of performance. (2) Part performance under an agreement may remove uncertainty and establish that a contract enforceable as a bargain has been formed. (3) Action in reliance on an agreement may make a contractual remedy appropriate even though uncertainty is not removed.

(1) Where an offer invites an offeree to accept by rendering a performance and does not invite a promissory acceptance, an option contract is created when the offeree tenders or begins the invited performance or tenders a beginning of it. (2) The offeror's duty of performance under any option contract so created is conditional on completion or tender of the invited performance in accordance with the terms of the offer.

(1) A counter-offer is an offer made by an offeree to his offeror relating to the same matter as the original offer and proposing a substituted bargain differing from that proposed by the original offer. (2) An offeree's power of acceptance is terminated by his making of a counter-offer, unless the offeror has manifested a contrary intention or unless the counter-offer manifests a contrary intention of the offeree.

An offeree's power of acceptance is terminated when the offeree receives from the offeror a manifestation of an intention not to enter into the proposed contract.

An offeree's power of acceptance is terminated when the offeror takes definite action inconsistent with an intention to enter into the proposed contract and the offeree acquires reliable information to that effect.

(1) Where an offer invites an offeree to accept by rendering a performance and does not invite a promissory acceptance, an option contract is created when the offeree tenders or begins the invited performance or tenders a beginning of it. (2) The offeror's duty of performance under any option contract so created is conditional on completion or tender of the invited performance in accordance with the terms of the offer.

(1) Where an offer invites an offeree to accept by rendering a performance, no notification is necessary to make such an acceptance effective unless the offer requests such a notification. (2) If an offeree who accepts by rendering a performance has reason to know that the offeror has no adequate means of learning of the performance with reasonable promptness and certainty, the contractual duty of the offeror is discharged unless (a) the offeree exercises reasonable diligence to notify the offeror of acceptance, or (b) the offeror learns of the performance within a reasonable time, or (c) the offer indicates that notification of acceptance is not required.

Except as stated in §69 or where the offer manifests a contrary intention, it is essential to an acceptance by promise either that the offeree exercise reasonable diligence to notify the offeror of acceptance or that the offeror receive the acceptance seasonably.

A reply to an offer which purports to accept it but is conditional on the offeror's assent to terms additional to or different from those offered is not an acceptance but is a counter-offer.