How is paternity established?
ORS has a great site to answer many of your questions regarding paternity. http://www.ors.state.ut.us/ORS_Stage/htm_files/faq.htm There are four basic ways to establish paternity. (1) The parents can sign a Voluntary Declaration of Paternity. (2) The parents can sign a stipulation and get an order. (3) ORS may file an administrative action to determine paternity, OR (4) A parent can file an action with the courts.
The court can legally establish paternity. A judge or other judicial officer may enter an order, which establishes paternity. The county Child Support Enforcement Unit may also establish paternity without going to court. The unmarried parents can also sign an Acknowledgment of Paternity form at the hospital when the child is born without going to court.