General Information and Instructions about Ending Your Marriage. Those forms must be notarized and filed with the Washington State Registrar of Vital Statistics to be valid. 6.Children of the marriage. Fill out this form, file it with the court, and get all other parties a copy. Statistics form. □. Step 2: Fill out these forms and make copies. Talk to a lawyer familiar with family law before filing anything with the court. I'm going to walk you through some of the documents you'll need to fill out in a divorce or custody case in Washington State. There are two forms that are required for every divorce, a "Confidential Information Form" and a "Certificate of Dissolution Vital Statistics" form. Serve Your Spouse: Your spouse must be served with the divorce papers.