Forms Library

Application for Delinquent Property Tax Sale Registration: By Illinois State Statutes, all buyers must register with the Lake County Treasurer’s office 10 business days prior to the tax sale.
Application for Reduction Mobile Home Tax: Application for Reduction Mobile Home Tax
Automatic Withdrawal Apply/Change/Cancellation Form: This form should be completed in order to have real estate tax payments automatically withdrawn from your bank account; Make changes to an existing account; or to Cancel the program altogether.
Mobile Home Registration: Mobile Home Registration
Property Tax Relief For Military Personnel: Please read form carefully to see if you qualify
Senior Designee (Request for Duplicate Delinquent Property Tax Notice): In Accordance with the Illinois State Statutes, Chapter 35 ILCS 200/15-170, anyone receiving the Senior Citizen Homestead Exemption may designate another person to receive a duplicate copy of any delinquent real estate tax notice.
Request for Taxpayer Identification Number and Certification (PDF): Federal Form W9 Request for Taxpayer Identification Number and Certification.