The simplest type of agreement is an agreement that requires a violation of the law. A gang of thieves may agree to steal a valuable painting and distribute the product evenly. However, if a party does not receive a fair share in the agreement, it cannot sue the others if it does not fulfill the contract, since the contract is considered legally void. A non-contractual definition would be an agreement without legal value. Legally, an agreement not concluded means that the contract or agreement is no longer applicable.3 min read 4. A countervailable contract involves a contract in which the agreement of one of the parties is not free, while an agreement not concluded refers to an agreement that does not fulfil the essential elements of a contract in force.