Is it possible to register a trading name for an existing business? Sole traders and partnerships You can trade under your own name, or you can choose another name for your business. You don’t need to register your name.   You must include your name and business name (if you have one) on official paperwork, for example invoices and letters.   Sole trader names must not:   include ‘limited’, ‘Ltd’, ‘limited liability partnership’, ‘LLP’, ‘public limited company’ or ‘plc’ be offensive be the same as an existing trade mark   Your name also can’t contain a ‘sensitive’ word or expression, or [...]