An affidavit is a sworn statement of fact that can be used in a variety of legal proceedings, from bankruptcy cases to family and civil litigation matters. An affidavit is a written statement that you swear is true and that may be used as evidence in a court of law.The disciplinary policy at Commerce allows only one punishment for "violation of 'no-strike' affidavit": removal. An affidavit is a written statement made under oath or affirmation. It's used as evidence in legal proceedings. It is a legal document detailing knowledge the person has or facts as they know them to be. An affidavit is a sworn statement that is documented in writing. Affidavits are usually utilized in court proceedings or in negotiations. An affidavit is the written equivalent of verballygiven court testimony. These legal documents are used in conjunction with witness statements or related evidence in a dispute.