Who is considered party to a case? Who can become party to a case?

They will add dad if they figure out who he is. On our cases they just put "unknown father" as a party.Grandparents can be added easily if the judge feels that they are a viable option. We filed a motion to intervene after termination. Here it's only 3 months before you can file that motion, but there probably isn't much you can do anyway that early on.