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Business Online

Basics in Filing a Business Certificate

Anyone who will operate a business in Suffolk County under a name, other than his or her own, must file a Business Certificate with the County Clerk’s Office. Once you have chosen a business name, research that business name to determine if it is available and to insure no one else is using that Business Certificate name by accessing the Suffolk County Clerk’s Online Records website (scroll down and accept the Use and Dissemination Agreement, then place the mouse on Searches to expand menu).

Business Certificate Online Search

  1. Enter the information you are searching by. (Date format 1/14/1999)
  2. Click the Search button.
  3. You may access additional information by clicking on the Business Name.

Corporations Search

Use the NYS Department of State, Division of Corporations, State Records & UCC website at

Note: as of June 2, 2014, corporations are filed electronically with the NYS Department of State; the Suffolk County Clerk’s Office no longer receives a hardcopy.

To order a copy of a corporation that was filed after June 2, 2014, please call the Department of State, Division of Corporations at (518) 473-2492 for assistance.

Note: Under no circumstances will searches be conducted by phone.

Business Certificate processing Hours: Monday – Friday 9:00 am – 4:30 pm.

General Information

Suffolk Better for Business is an online toolkit to better assist you, whether you are just starting your business, in a growth phase, or considering relocation, you may contact them at (631) 853-4800 or

Free counseling is available for new business owners from the following organizations.

New York State Small Business Development Center:

S.C.O.R.E./Small Business Administration (Long Island Locations) (888) 433-3632

Suffolk County Women's Business Enterprise Coalition (631) 853-4738 or

Suffolk County Government

H. Lee Dennison Bldg

100 Veterans Memorial Hwy
P.O. Box 6100
Hauppauge, NY 11788

Riverhead County Center

County Road 51
Riverhead, NY 11901