All requirements must be met to complete the filing of a Fictitious Business Name. Statement: Owner must sign.A name can be reserved for a period of 60 days. For faster service, name reservations can be submitted online through our enhanced online services. Register a Business, Who Can File, Filing Options, There are options available for you to file your Fictitious Business Name Statement. Choose a Business Name​​ If your business name includes your legal last name, then your work is done. All companies doing business within the City of Los Angeles must register their business with the City and pay business taxes each year. Ready to File Your Los Angeles DBA? Fill out our online order form; We check for name availability. You'll want to choose a business name that reflects your brand identity and doesn't clash with the types of goods and services you offer.