You'll definitely need to consult an attorney licensed to practice in Pennsylvania. Often, the requirement is minimal. When I adopted two of my children (their biological father had abandoned them) I was only required to run one ad in the local paper here in Texas to try to locate him. We knew he was living in a different state, but the law only required us to advertise once in the local paper. You might try Googling some search terms along the lines of "Pennsylvania family law divorce notification" if you're doing everything you can to avoid paying a lawyer. Having said that, I've always found that good legal advice may be a little costly on the front end, but it can save you a ton later in mistakes avoided.