"RCW 26.09.020
Petition — Dissolution of marriage or domestic partnership, legal separation, or for a declaration concerning validity of marriage or domestic partnership — Contents — Parties — Certificate.
(1) A
petition in a proceeding for dissolution of marriage or domestic partnership, legal separation, or for a declaration concerning the validity of a marriage or domestic partnership
shall allege:
(a) The
last known state of residence of each party, and if a party's last known state of residence is Washington, the last known county of residence;
(b) The date and place of the marriage or, for domestic partnerships, the date of registration, and place of residence when the domestic partnership was registered;
(c) If the parties are separated the date on which the separation occurred;
(d) The names and ages of any child dependent upon either or both spouses or either or both domestic partners and
whether the wife or domestic partner
is pregnant;
..."
RCW 26.09.020: Petition ? Dissolution of marriage or domestic partnership, legal separation, or for a declaration concerning validity of marriage or domestic partnership ? Contents ? Parties ? Certificate.