Ill. Admin. Code tit. 14, § 166.30 – Filing Location

a) All documents required to be filed with the Secretary of State pursuant to the UPA shall be filed with the Department.
b) Documents submitted for filing in Springfield, the Department's headquarters, shall be filed at the following address:
Department of Business Services
Uniform Partnership Act Section
Room 357, Howlett Building
Springfield, Illinois 62756
c) Documents submitted by mail for filing should be sent to the Department's Springfield office.