Protection of a business name is established by the registration of that name through the County Clerk's office in the county in which the business is located. County Clerks of this state are authorized to reject any assumed name which is likely to mislead the public, or is so closely similar to other business names as to lead to confusion or deception.
To ensure that the business name you are interested in is not being used by a corporation, limited liability company, incorporation or non-profit organization, which are filed at the State level, please search the STATE OF MICHIGAN BUSINESS ENTITY DATABASE (click here)
To ensure the business name you are interested in is not currently registered at the COUNTY LEVEL, please contact one of our offices via phone or in person. Business names are subject to our approval.
There are two  types of registrations at the county level, 1.) an assumed name and 2.) a co-partnership.
1.) An assumed name consists of one or more parties. It is the more binding of the types, as all parties listed must sign the papers in front of a notary and no changes can be made without the signatures of all parties involved.
2.) A co-partnership is started by two or more parties, but it may be dissolved or changed by the signature of any one or more of the parties.
If doing business in Wayne County, your certificate of conducting business under an assumed name or certificate of co-partnership must be filed with the Wayne County Clerk's Office in person or through the mail. **Please note that the application must be notarized if you are sending the Wayne County Clerk's Office your completed application in the mail. However, staff at any of our locations can notarize your application if you file in person. Make sure to bring your state-issued photo identification (i.e. drivers license or Michigan state I.D. card) when filing in person.**
Wayne County Clerk's Office
201 Coleman A. Young Municipal Center
Detroit, MI 48226
*Please Note: We no longer accept personal checks. All personal checks will be returned. Make money orders payable to the Wayne County Clerk. Two  certified copies of the certificate will be returned to you after filing.
Registration of the business name protects the use of that name (in Wayne County) for five  years. Continued use of a name occurs by renewing registration at five  year intervals.
A person owning, conducting or transacting a business must be at least 18 years of age.
The McNamara Building
477 Michigan & Cass Ave. [Basement] 48226
Hours: 8:00am - 4:30pm
Ph: (800) 829-1040 [For tax ID via phone]
Michigan Dept. of Treasury
Executive Plaza Building
1200 Sixth St. [At Howard St.] 48226
Hours: 8:00am - 4:30pm
Ph: (517) 373-3190 [For tax ID number]
Ph: (800) 487-7000 [For income tax info]
General License Bureau
Consumer Affairs Department
105 City-County Bldg. 48226
Hours: 8:30am - 4:00pm
Ph: (313) 224-3178
Cash, money orders, in-state company checks, cashier and certified checks, debit and credit cards (Master Card, Visa Debit ONLY, American Express)
Corporations are registered with the Michigan Department of Commerce, Corporation and Securities Bureau. Obtain a Michigan Sales Tax Number from the Michigan Department of the Treasury. Business Licenses and/or permits are obtained through the city in which the business is located or through the State of Michigan. Licenses for businesses located in the City of Detroit are obtained in the Coleman A. Young Municipal Center (2 Woodward Avenue, Detroit, MI 48226) in Room 402. They can be reached at (313) 224-3178.
Information on filing an LLC, Incoporations & Corporations please contact:
State of Michigan LARA - Licensing and Regulatory Affairs
2501 Woodlake Circle
Okemos, MI 48864
Ph: (517) 241-6445
State Website (click here)