When applied to promises, agreements or contracts, the term denotes that such agreements have no legal effect. The law disapproves of such conduct because it is immoral or contrary to public policy. Unlawful does not necessarily imply criminality, although the term is sufficiently broad to include it.

Termination of employment against the will of an employee; the end of an action or claim before a judgment has been delivered, often during the very early stages.

Used to describe a situation where an employer dismisses an employee in breach of employment law, which may give rise to legal proceedings for reinstatement and/or compensation for dismissal.