Online filing for Trade Names and Trademarks has been fully implemented and PDF forms are no longer accepted. Tradename Registration Guidelines.The registration of trade names and marks is not legally required in Arizona, but is an accepted business practice. Log in to access forms. Select the type of form listed below for direct links to TEAS and TEASi forms. The Office of the Secretary of State files the registration of trade names and trademarks in the State of Arizona. Fill Out The Trademark Application. Resources are available for Arizona residents to help inventors and entrepreneurs learn more about protecting their intellectual property. Our comprehensive guide on "Trademark Arizona" will help you understand the ins and outs of securing your brand identity in Arizona.