Business Services Contact Form
To download business forms, please visit the Publications section.
To search for companies formed or registered in Illinois, please visit the Corporate/LLC Search/Certificate of Good Standing section.
To search for limited partnerships and limited liability partnerships formed or registered in Illinois, please visit the LP/LLLP/LLP Database/Certificate of Existence section.
To search for marks registered in Illinois, please visit the Trademark/Servicemark Search section. For more information about trademarks and servicemarks, e-mail TM/SM@ILSOS.NET.
- Chicago Business Information Line 312-793-3380
- Springfield Business Information Line 217-782-6961
- Polish Business Information Line 312-793-4938
- Spanish Business Information Line 312-793-2365
- For certified copies and copy requests for corporations, please call 217-782-6875.
- For certified copies and copy requests for LLCs, LPs and LLPs, please call 217-524-8008.
To inquire about the status of a registration, please include the type of business form and date submitted.