/nʌˈlɪti ˈækʃən/ – Phrase
Definition: kiện đòi công nhận vô hiệu.
A more throughout explanation: A nullity action is a legal proceeding initiated to challenge the validity or legality of a contract, marriage, or other legal document. The purpose of a nullity action is to have the document declared null and void, as if it never existed, due to some defect or violation of law.
Example: In the case of Smith v. Jones, the plaintiff filed a nullity action seeking to have the contract declared void due to lack of capacity to enter into a legally binding agreement.