The Illinois Generic Bill of Sale is a legally binding agreement that documents the transfer of different kinds of items from one party, usually known as the seller or the transferor, to another, called the buyer or the transferee. This document must contain all of the important information pertinent to the deal. The State of Illinois does not provide any government-issued templates you can use to record the sale of the items you own.
No, the State of Illinois does not require a notarized Bill of Sale but if you want to add an extra layer of security to your deal, you may include sections for witnesses' signatures and/or a notary public's certification. This can save any potential trouble which might occur should the seller or buyer contest the transaction at a later point in time.