A Washington Certificate of Dissolution, Declaration of Invalidity of Marriage, or Legal Separation, are legal documents used to dissolve a marriage in the state of Washington. There are three different types of documents available in Washington, depending on the circumstances of the marriage. The first type is the Washington Certificate of Dissolution. This document is used when couples are mutually deciding to end their marriage and want to file for a divorce. It is the most common form of ending a marriage in Washington, and it requires both parties to agree to the dissolution of the marriage. The second type of document is the Washington Declaration of Invalidity of Marriage. This document is used when the marriage is not legally valid, such as when one or both of the spouses was already married when the marriage took place. This document is used to declare that the marriage is invalid and that it should be dissolved. The third type is the Washington Legal Separation. This document is used when a couple wants to separate but does not want to end the marriage. This document outlines the rights and responsibilities of each spouse, and it may also include provisions for spousal support and child custody. All three of these documents can be obtained from the Washington State Department of Health, and they must be signed by both spouses before they are filed with the court. Once the documents are filed, the court will review them and decide whether the marriage should be dissolved.