Legal Question in Family Law in California

Some more information would be helpful to answer your question. If your process server properly served your wife with summons and petition while she was in California, then California has jurisdiction over her. If she has appeared in your divorce action, your server can serve her subsequent pleadings and documents by mail, at the address she listed in her court papers.

If she has not been served at all with the Summons, you could have your process server mail her a Notice and Acknowledgement of Receipt pursuant to Code of Civil Procedure section 415.40. If she refuses to acknowledge, however, you would still have to serve her by hiring a process server in Idaho.