• Termination by revocation: In contract law, the withdrawal of an offer by an offeror; unless the offer is irrevocable, it can be revoked at any time prior to acceptance without liability.
• Termination by rejection: If an offeree rejects the offer, the rejection immediately terminates the offer. A counter offers is a rejection; it terminates the offer
• Termination by expiration: When an offer specifies a time limit for acceptance, if no time is specified there is a reasonable time period to accept.
• Termination by operation of law: Qualifies if there is a lapse of time, destruction of the subject matter, death or incompetence of a party, legality issues.