The register's court was established by the Pennsylvania Constitution of 1790. Made up of the register of wills and judges of the court of common pleas, the court heard appeals of decisions made by the register of wills. Typical cases concerned the validity of wills or the appointment of administrators. The Pennsylvania Constitution of 1874 abolished the register's court, transferring the court's jurisdiction to the orphans' court.
In most cases, the papers relating to the docket entries indexed here can be found in the Wills and Administrations file of the decedent.