In law, a transaction or action which is voidable is valid, but may be annulled by one of the parties to the transaction. Voidable is usually used in distinction to void ab initio (or void from the outset) and unenforceable.The act of invalidating the contract by the party exercising its rights to anul the voidable contract is usually referred to either as voiding the contract (in the United States and Canada) or avoiding the contract (in the United Kingdom, Australia and other common law countries).Generally speaking, one party will have the right to elect whether to annul the transaction or to affirm it. The avoiding of a voidable transaction amounts to the rescinding it, or exercising a power of rescission, and as such is subject to the general law in that regard.The right to rescind can be lost. In common law there are generally said to be four "bars" to rescission, any one of which will cause the agreement to no longer be considered voidable.
delayIn English law, see Long v L