Probate and estate matters are governed by state law. The federal government may tax an estate, but it does not handle will contests or, for example, guardianships. Pennsylvania does not have a probate court, per se. Rather, it has Orphans' Court.
We are one of two states to have an Orphans' Court, so the term may sound unfamiliar or even antiquated. The first step to understanding what the court does, though, is to understand that the term "orphan" has a broader definition than the one we are used to, the one in novels by Charles Dickens. Orphans in this case are people who lack protection; the Orphans' Court steps in to protect the rights, both personal and property, of Pennsylvanians who cannot handle their affairs on their own. Minors, incapacitated individuals, decedents, nonprofits and trusts are all included in the court's jurisdiction.