Yes: Florida law requires you to register a Fictitious Name with the Florida Department of State when doing business under any name other than your own exact legal name. This requires submission of a form with a $50 fee, and advertising once in the county in which you will be doing business. You can file the forms with the Department of State's website, "Sunbiz", the main menu of which will direct you to the online form section. The legal notices section of local papers will charge small fees for the required publication. Good luck with your new venture.