Using an Assumed Name
Also called a trade name, ficticious name, or "doing business as" (DBA), an assumed name is a name you are using other than the legal name of the business. If you are a sole proprietorship, your legal name is your own name; if your business is a partnership, LLC or S-Corporation, the legal name under which the business was registered.
Most states required individuals or businesses operating under an assumed name to register the name, and prohibit more than one business using the same name. The Small Business Administration's search tool can direct you to the appropriate agency for your state.