Anti Contest Clause is a clause intended to keep a person from doing something or not doing something. It is also called no-contest clause in terrorem clause, noncontest clause, terrorem clause, and forfeiture clause. In a will, a no-contest clause is intended to keep beneficiaries of the will from challenging its terms. Such clauses usually state that if a beneficiary challenges the will and loses, that beneficiary will receive nothing under the will. Such clause is unenforceable under some states' laws.