Once a man has been deemed a father, either because of marriage or because he has acknowledged paternity (by agreeing to be on the birth certificate, say, or paying child support), most state courts say he cannot then abandon that child — no matter what a DNA test subsequently reveals. In Pennsylvania and many other states, the only way a nonbiological father can rebut his legal status as father is if he can prove he was tricked into the role — a showing of fraud — and can demonstrate that upon learning the truth, he immediately stopped acting as the child’s father. In 2003, a Pennsylvania appellate court bluntly applauded William Doran — who had been by all accounts a loving father to his 11-year-old son — for cutting off ties with the boy once DNA showed they were not related. The judges found that Doran had been tricked by his former wife into believing he was the father of their son, and he was allowed to abandon all paternal obligations.So if you get tricked in Penn., you have to cut ties as soon as you find out, or else you may end up paying child support to both the biological mother and the biological father.
The article makes this more complicated than it is. We need better laws recognizing DNA tests.