Washington Letters of Administration With Oath is a legal document issued by a court in the state of Washington in order to appoint a person to be the administrator of an estate of a deceased person. This document is required when the deceased did not have a will and there are no heirs or beneficiaries. It grants the administrator legal authority to manage the estate, including paying debts, distributing assets, and filing tax returns. The administrator takes an oath to faithfully administer the estate in accordance with applicable laws. There are two types of Washington Letters of Administration With Oath: general and special letters. General letters are typically issued if the estate is small or if there are no known heirs. Special letters are issued when the estate is large or when there are known heirs.