An affidavit (/ˌæfɪˈdeɪvɪt/ ⓘ AF-ih-DAY-vit; Medieval Latin for "he has declared under oath") is a written statement voluntarily made by an affiant or deponent under an oath or affirmation which is administered by a person who is authorized to do so by law. Such a statement is witnessed as to the authenticity of the affiant's signature by a taker of oaths, such as a notary public or commissioner of oaths. An affidavit is a type of verified statement or showing, or containing a verification, meaning it is made under oath on penalty of perjury. It serves as evidence for its veracity and is required in court proceedings.