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Business First Steps

Index of State of Delaware Business Licenses and Registrations

“Doing Business As” Name Registration for Business Fictious Names

Doing Business As (DBA) name registration

“Doing Business As” (or “DBA”) names are registered in the Prothonotary’s office in the county in which you are doing business in the State of Delaware. The registration of Trade, Business and Fictitious Names is required by persons, firms or associations engaging in, prosecuting or transacting any business within the limits of the State of Delaware. Pursuant to Title 6 Del. C. Chapter 31 § 3101 and § 3103 this registration is to be filed in the Office of the Prothonotary of each county in which business is transacted. If you are going to do business in New Castle and/or Kent and/or Sussex Counties, then you MUST register with each respective Prothonotary’s Office.

More Information

Department: Courts

Division: Superior Court


$25.00 per name in each county you wish to register in Delaware

Apply Online (Fillable)

Applicable Laws


Contact the Prothonotary’s Office for each county

Registry of Licenses Search


This search covers most of the frequently requested licenses, certifications, registrations, and filings that the State of Delaware requires. However, this is not a fully exhaustive list of every possible requirement. Please consult with the appropriate state agencies to find out if there are additional requirements you must fulfill.

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