David Orr, Cook County Clerk
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Registering an Assumed Business Name

Step 2
Publish the Legal Notice

After the Clerk’s office returns the Copy of Legal Notice form and registration number to you, a notice of the filing of the certificate must be published in a newspaper that is based and circulates within Cook County within 15 calendar days from the original registration date stamped on the Assumed Business Name Application.

How to publish

  1. You must submit the Legal Notice for publication in a local weekly newspaper that publishes in Cook County. The first date of publication must be no later than 15 calendar days from the original date of application.

  2. Publish the notice once a week for three consecutive weeks.

  3. The newspaper will provide you with a notarized Certificate of Publication with an original clipping of the published legal notice certifying that you have complied with the above requirements. A photocopy of the legal notice is not sufficient; you must return the signed and notarized affidavit with a clipping of the ad attached. Failure to file the proof of publication renders the registration VOID.

  4. Submit proof of publication by presenting that form - along with an original clipping of the published Legal Notice - to the Cook County Clerk's office no later than 50 calendar days from the original date of application for the assumed name.

    • Mail:
      Cook County Clerk David Orr
      Bureau of Vital Records
      Attn: Assumed Name Unit
      P.O. Box 641070
      Chicago, IL 60664-1070
    • Deliver in person:
      • Cook County Clerk's Assumed Name Unit
        50 W. Washington Street
        West Concourse Level, Room CL-25 
        Chicago, IL
      • Bridgeview Courthouse
        Cook County Clerk's office
        10220 S. 76th Ave., Room 238
        Bridgeview, IL 60456
      • Rolling Meadows Courthouse
        Cook County Clerk's office
        2121 Euclid Ave., Room 238
        Rolling Meadows, IL 60008

  5. The Clerk's office will issue you an Assumed Business Name Certificate and record the business name (same-day service for certificate receipt is available at the Clerk's Chicago location).