Create and download forms for. Use this form to swear under oath in writing to facts that you personally know.All forms are ADA accessible, and you can handwrite or type into the PDF form to fill it out. Enter your complete address, telephone number, and email address, if you have one. In the body of the affidavit, include a statement affirming the affiant's identity. InPerson Filing: I can file the affidavit directly at the local courthouse where my case is being heard. Affidavit for Service. Edit, sign, and share illinois affidavit template online. No need to install software, just go to DocHub, and sign up instantly and for free.