Also known as a DBA (doing business as), if your entity is using a name for its business that’s different from its entity name, then you are using a fictitious business name, and state law requires that you file a fictitious business name statement in the county you are operating out of that records the name of your business and the name of the entity using that name. It’s also a good idea to do file that even if you don’t want to, because it’s helpful evidence to prove the use of your name from a certain point in time, which helps you to defend or bring trademark infringement claims.