Service is mandatory so I'm not sure why your sister did not have her spouse served? Another adult or a process server can serve and her spouse would not have to do anything.
If her spouse is still living in CA and your sister knows where he lives, we may be able to help. However, she would have to be sure that he would not 'respond' and that they do not have any issues (like children or property) that have to be resolved since she would not be able to come to CA for a court appearance.
Answered on Dec 17th, 2013 at 12:45 AM