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IDOR
Business Registration
Learn more about registration requirements for Illinois businesses.
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Illinois Business Information
Links to information and resources for starting, running, expanding, relocating, or closing a business
SOS
Corporate & Limited Liability Company (LLC) Name Search
Corp and LLC Certificate of Good Standing allows you to search for information regarding corporations, not-for-profit corporations, limited partnerships, limited liability companies and limited liability partnerships, as well as, other business-related information.
IDOR
Verify a Registered Business
Verify an Illinois Business Registration here.
CMS
Become a Vendor & sell to state government
Learn how to do business with the state and sell products and services as a vendor
IDOR
Certificate of Resale
Learn more about Certificate of Resale requirements for Illinois businesses.
SOS
Corporation & Limited Liability Corporation Online Filings
Business Services Home Page allows you to access the areas of Business Services and their forms.
SOS
Locate Registered Business Names
On here twice: Corp and LLC Certificate of Good Standing allows you to search for information regarding corporations, not-for-profit corporations, limited partnerships, limited liability companies and limited liability partnerships, as well as, other business-related information.
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