An affidavit is the written equivalent of verballygiven court testimony. An affidavit is more than just a legal document; it's a sworn statement that holds significant weight in the eyes of the law.An affidavit is a written statement made under oath or affirmation. It's used as evidence in legal proceedings. Contractors wanting to bid on items included in a particular letting must submit the properly completed. In 3a-d, check the boxes of the documents you are attaching to this form as evidence of your income, assets, and debts. If you select 3d, enter the names of the. A written declaration upon oath made before an authorized official.