The recall of some power or authority that has been granted.
Revocation by the act of a party is intentional and voluntary, such as when a person cancels a power of attorney that he has given or a will that he has written. The revocation of a will takes place when a testator makes a later will containing terms that are inconsistent with the terms of an earlier will, or when the testator destroys the former will.
A revocation by operation of law or constructive revocation occurs without regard to the intention of the parties. A power of attorney, therefore, is ordinarily revoked automatically by operation of law upon the death of the principal.