The advice from the Office of the Attorney General, Education Division concerning presumption is that before domicile is established, an individual must do everything a resident of Washington is required to do (please see numbers 1-4 below).
To establish domicile in the state of Washington, students must provide documentation showing they meet the following guidelines:
Once the individual is in full compliance with all of Washington's requirements for residency, then s/he, as of that final date of compliance, has established domicile. Once domicile is established, the student is eligible for in-state tuition 12 months from the date of arrival if all legal ties were in place within 30 days. This is because the Washington statute says that domicile must be in existence for one year immediately prior to the first day of the quarter for which the student wants to be classified as a resident.
Examples of other factors that may help students establish proof of domicile include: disposition of property in the former state of residence, relocation of household members, participation in local community organizations, and generally becoming involved in activities that will help prove their intent to make Washington their official place of residence.