Illinois Affidavit For Notice By Posting is a document used in the state of Illinois when providing notice of a legal matter to a party who cannot be served in person. This document is typically used in situations such as foreclosure proceedings, eviction proceedings, and other legal matters involving a party who cannot be served in person. The Affidavit outlines the steps taken to provide notice to the party through posting the notice in a public place, such as a town hall, courthouse, or post office. The Affidavit must be signed by the party providing the notice and must include the details of the posting, such as the date, time, and place of the posting. There are two types of Illinois Affidavit For Notice By Posting: a Residential Affidavit and a Commercial Affidavit. The Residential Affidavit is used when providing notice to a residential property owner, while the Commercial Affidavit is used when providing notice to a business or commercial property owner.