valid contract
A contract that complies with all the essentials of a contract and is binding and enforceable on all parties

Definition of 'Void Contract'
A formal agreement that is illegitimate and unenforceable from the moment it is created. A void contract could be considered void for a number of reasons. Common causes of a void contract are contract terms that are illegal or become illegal due to changes in law; one party to the contract lacks the capacity to enter into a contract because he is a minor or mentally incapacitated; and it is legal but declared null by the courts because it violates a fundamental principle. void contract Definition
A contract that meets any of the following criteria:
(1) it is illegal from the moment it is made; (2) it is legal but declared null by the courts because it violates a fundamental principle such as fairness, or is contrary to public policy; (3) it becomes void due to changes in law or in government policy; or (4) it has been fully performed.
Lack of capacity to contract (such as arises from being an infant or minor, intoxicated, or insane) automatically makes a contract void. A contract that is void only in one or few parts may be saved by the process of severance. Not to be confused with voidable contract.

Definition of 'Voidable Contract'
A formal agreement between two parties that may be rendered unenforceable for a number of legal reasons. Reasons that can make a contract voidable include failure by one or both parties to disclose a material fact; a mistake, misrepresentation or fraud; undue influence or duress; one party's legal incapacity to enter a contract; one or more terms that are unconscionable; or a breach of contraA contract that has legal effect and force when it is made, but is liable to be subsequently annulled or set aside by the courts through the process of rescission.
Circumstances or features