1999) defines an affidavit as a "written statement made on oath before a notary public or other person authorized to administer oaths. The disciplinary policy at Commerce allows only one punishment for "violation of 'no-strike' affidavit": removal.A written statement that someone makes after promising officially to tell the truth. An affidavit can be used as proof in a law court. An affidavit is the written equivalent of verballygiven court testimony. An affidavit is a written statement which you swear is true and which may be used as evidence in a court of law. Affidavit definition: A written declaration made under oath before a notary public or other authorized officer. Under penalties of perjury, I declare that I have read the foregoing Affidavit of Heirs and the facts stated therein are true. Affiant (Signature). Name:. A written statement that someone makes after promising officially to tell the truth.