Verify statements for legal matters and business transactions using our Illinois general affidavit form template. Use this form to swear under oath in writing to facts that you personally know.Instructions▾. In 1, enter your name and the date you served the occupants. In 2, check the box that states how you delivered the Demand or Notice. (Sample – Do not complete this form – Complete on Company Letterhead). The person requesting this notarial act must personally appear before the notary and sign the document in the presence of the notary. Illinois Legal Aid Online provides a guided interview called an Easy Form that will help you fill out the forms. Sample - Affidavit of Heirship (Sample 1) (Sample 2).