Create and download forms for. Complete Sponsor's Personal Information Fill in the sponsor's full name, date of birth, and contact information.Illinois Affidavit Templates. Use our Affidavit template to swear to the truthfulness of a statement or fact. 30 The joint sponsor must sign a separate Affidavit of Support, Form I-864. How to fill out the Sample Affidavit of Support Notarized Document? 1. Enter the sponsor's name and relationship to the student. 2.