/əˈtɛstɪd wɪl/ – Phrase
Definition: Văn bản di chúc được chứng thực.
A more thorough explanation: an official document that says what a person wants to be done with their assets after their death that has been signed by a witness (=a person who sees a document being signed and signs it themselves to confirm this)
Example: An attested will must, of course, be in writing.