I live in Utah. This guys business license, his DBA, has expired and the state and the city said the name was available and that I could use the name, as the owner of this business let the DBA expire for both the city and the state. So can I make this guy stop using this name on his business? I can turn him in for not having a business license right? And if he doesn't stop using the name I can sue him correct? What should I sue him under, what would be my claim?