An Illinois Affidavit of Lost Missing or Stolen Check is a legal document used to declare that a check has been lost, stolen, or missing. This document is signed by the maker of the check, the payee, and the bank issuing the check. It serves as proof that the check has been lost, stolen, or missing, and that the maker of the check has taken appropriate action to prevent any potential fraud or misuse of the check. There are two types of Illinois Affidavit of Lost Missing or Stolen Check: a single-party affidavit and a joint-party affidavit. A single-party affidavit is signed by the maker of the check, while a joint-party affidavit is signed by both the maker of the check and the payee. The affidavit must be filled out completely and accurately in order to be considered valid.