I live in PA and when I was 18years old I partied a lot and traveled different places and by 19 I had a son, He is 2 years old now I never really knew his father so I couldn't search for him if I wanted to. I am engaged now and my fiancé and I wish for him to be listed as my sons father on the birth certificate... Can I list a father even though its been 2 years already? And What are the steps I need to take to do it?