Use this form to swear under oath in writing to facts that you personally know. Verify statements for legal matters and business transactions using our Illinois general affidavit form template.Learn how to fill out an affidavit correctly with this comprehensive guide. Discover the steps, types, and when you might need an affidavit. This document provides a comprehensive overview of the Illinois General Affidavit along with all necessary instructions and a checklist for proper filing. 8. This form must be signed in the presence of a notary public. Notary publics are available at most banks and currency exchanges for a minimal fee. Provide the requested information below. The signer need not sign in the notary's presence but must personally appear before the notary and state that the signature on the document is his or hers.