Forms on this website are PDFs with fillable fields. Forms should be downloaded to your computer before filling in the fields.What do I need first? You will need a witness to sign this document and their driver's license number. Edit, sign, and share illinois affidavit license online. No need to install software, just go to DocHub, and sign up instantly and for free. Hit the "Get Form" Button on this page. Wait in a petient way for the upload of your Affidavit For Driver'S License Illinois. What is an Affidavit of Identity?