Well I’m not trying to evade him actually I’m asking how to prevent a default judgment since he doesn’t know where I live
Your sister knows where you live, correct? Is she the one who informed you of the attempt to serve you? She is no doubt just one California contact who can possibly lead a process server to your out-of-state doorstep.
A process server has tools at his disposal that can assist in locating you but, as adjusterjack noted, if several attempts to serve you fail, the father can request an alternate means of service. Any delay now is, in other words, merely that - a delay. And if a court determines you purposely have kept your child from the dad, this potentially can affect a custody decision.
How old is your child?
I am not by any measure an expert in child support or child custody matters, by the way, but FreeAdvice has as a member a family law attorney who probably can give you some real-life consequences that can come from trying to prevent a parent from contact with their child. I am tagging Ohiogal -
@Ohiogal - so she can provide some insight.