Английский язык для юристов. Предпринимательское право - стр. 14

A counteroffer is a response to an offer in which the terms of the original offer are changed. No agreement is reached unless the counteroffer is accepted by the original offerer.

In contracts for the sale of goods, as long as there is a definite expression of acceptance, a contract will result even though an acceptance has different or additional terms. If both parties are not merchants, the different or additional terms are treated as proposals for amendment to the contract. If the parties are both merchants, however, the different or additional terms become part of the contract unless (a) they make an important difference, (b) the offerer objects, or (c) the offerer limits acceptance to its terms.

Acceptance may result from the conduct of the offeree. Actions and gestures may indicate the offeree's willingness to enter into a binding agreement.

As a general rule, silence is not an acceptance. If, however, both parties agree that silence on the part of the offeree will signal acceptance, then such an acceptance is valid.

Another exception to the general rule occurs when the offeree has allowed silence to act as acceptance. The offerer cannot force the offeree into a contract by saying silence will mean acceptance. The offeree, however, can force the offerer into a contract if the offerer established the silence condition.

A rejection comes about when an offeree expresses or implies refusal to accept an offer. Rejection terminates an offer and all negotiations associated with it. Further negotiations could commence with a new offer by either party or a renewal of the original offer by the offerer. Rejection is usually achieved when communicated by the offeree.

A revocation is the calling back of the offer by the offerer. With the exception of an option contract and a firm offer, an offer may be revoked anytime before it has been accepted. The offerer has this right, despite what might appear to be a emphasis moral obligation to continue the offer. An offer may be revoked by communication, automatic revocation, passage of time, death or insanity of the offerer, destruction of the subject matter, or the subsequent illegality of the contract.

An offer may be revoked by the offerer communicating that intention to the offeree before the offer has been accepted. Revocation is ineffective if the acceptance has already been communicated, as by mailing the acceptance in response to a mailed offer. Direct communication of revocation is not required if the offeree knows about the offer's withdrawal by other means.