Washington Paternity and Parentage Resources

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When parents were never married, parentage usually has to be established before a court will set a schedule or an amount of support. In Washington that case is handled by the Superior Court, usually in the Family Law.

Establishing parentage is what gives a father the standing to ask for time with his child, and it is what lets either parent ask the court for support. In many states the same case can settle parentage, the parenting schedule, and child support together.

Official Washington paternity resources

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Washington family law forms (official index) (Washington judicial branch): The official statewide collection of Washington family law forms. When a direct document link stops working, this index is where the current version lives. https://www.courts.wa.gov/forms/?fa=forms.contribute&formID=31

Washington court self-help resources (Washington courts self-help): Official self-help information for people handling their own Washington family case, including instructions and plain-language guides. https://www.courts.wa.gov/newsinfo/?fa=newsinfo.self_help

eFileWA (participating counties) plus county systems (Multiple): Washington has no single statewide rule: each county decides whether and how you can e-file. The official eFileWA portal serves a growing list of courts and is open to people without lawyers, while big counties like King run their own systems. https://efilewa.tylertech.cloud/OfsEfsp/ui/landing

Washington child support guideline resources (courts.wa.gov): Official Washington child support guideline materials, worksheets, or calculators. https://www.courts.wa.gov/forms/?fa=forms.contribute&formID=15

Verified official Washington parentage documents

These official documents are used to establish or contest parentage in Washington.

Petition to Decide Parentage (FL Parentage 301), form FL Parentage 301 (Paternity), official document: https://www.courts.wa.gov/forms/documents/FL%20Parentage%20301%20Petition%20to%20Decide%20Parentage_2025_07.pdf

Official link data for Washington was last verified June 2026. Report anything outdated through our contact page and we will re-check the official source.

Frequently asked questions

Does signing the birth certificate settle everything?

A voluntary acknowledgment can establish parentage, but on its own it does not create a parenting schedule or a support order. Those come from a court case.

Can parentage, custody, and support be handled together?

In many states one case can cover all three. Check the official Washington forms and self-help material above to see how this state organizes it.