details or facts about what you will be declaring or affirming.Note: You may need to complete a statutory declaration if you assist a person to make a statutory declaration by providing a language interpretation. The Act contains 2 alternative document formats that you can use: A statutory declaration is a written statement that a person swears, affirms or declares to be true in the presence of an authorised witness, usually a:Ī NSW statutory declaration is made under the Oaths Act 1900.