Rules & Licenses
Nassau Assumed Names Start With Clerk Forms
Nassau sole proprietors and partners using an assumed name should check County Clerk forms and public records before filing.
Published June 23, 2026 · Last verified June 23, 2026
A Nassau County business-name check belongs near the start of a small-business setup. Business certificates on file in Nassau are available for public review at no charge. A formal search can also be requested for a fee. The clerk’s forms page includes a Certificate of Business for a sole proprietorship or individual using an assumed name, also called a DBA certificate.
It also has partner forms and forms to amend or discontinue a certificate. Before using a name publicly, check county records and the state corporation database.
Keep the exact assumed name, county and state search results, matching individual or partner form, filing date, and filed certificate together. Use the amendment or discontinuance form when the business record changes or ends.