Washington State offers specific templates designed to simplify the process for legally domiciled adults. All our forms are free.First name of decedent: Middle: Last: Date of death: Social Security number: 1. I am a resident of the State of Washington, in accordance with RCWB 15.012.(2)(a)-(e). 2. Use our Affidavit of Residency form to verify your home address for official purposes. Download Washington Affidavit of Domicile template, modify and send for signing using BoloForms Signature. All domicile must be established at least one year immediately prior to the first day of the quarter the student is seeking residency.