Fill in the recipient's name. This page includes forms, fees, and instructions for all domestic business entities, foreign and domestic Registered Agents, and Washington Trademarks.To fill out the money order, you will need to "Pay to" U.S. Department of Homeland Security. Welcome to Washington State Courts. You can file an application to change your legal name in any district court in Washington. The person requesting a name change is called the "petitioner." Filled in all information required on the petition form? Filing Instructions. You must provide identification with your application.