If she actually filed the petition for dissolution with the court, she will have to return for the court dates. (It is allowable to serve the other party first and then file, so just because you may have received papers does not necessarily mean there is an open case; check the state court website for superior court domestic cases under your name to be sure: http://dw.courts.wa.gov/index.cfm?fa=home.superiorSearch &terms=accept&flashform=0) If she hasn't filed, you can start the case. You will have to find a way to track her down in order to get her served, but if you can locate her, the court can compel her to return with the child until there is a parenting plan in place. If there has been no court involvement in your family in Washington, you should open the case soon while this is still considered the child's home state, because only the home state will have full jurisdiction. (There are rules about determining a home state, but a general rule of thumb is where the child has resided for the majority of the past 6 months.)
Answered on Oct 19th, 2012 at 9:28 PM