Revocation is the act of recall or annulment. It is the cancelling of an act, the recalling of a grant or privilege, or the making void of some deed previously existing. A temporary revocation of a grant or privilege is called a suspension.
Contract law
In the law of contracts, revocation is a type of remedy for buyers when the buyer accepts a nonconforming good from the seller. Upon receiving the nonconforming good, the buyer may choose to accept it despite the nonconformity, reject it (although this may not be allowed under the perfect tender rule and whether the Seller still has time to cure), or revoke their acceptance. Under Article 2 of the Uniform Commercial Code, for a buyer to revoke, he must show (1) the goods failed to conform to the contract and (2) it substantially impaired the value of the goods (this is a question of fact). A Proposal/Offer May be revoked at any time, before the communication of its acceptance is complete as against the proposer, but not afterward.
If the buyer knew of the nonconformity at the time of acceptance, he can revoke only if he can show he accepted the goods with the impression...