Register of Wills office have records dating back to 1800 when Adams County was formed, before that the county was a part of York County. Register of Wills office is a resource for genealogical information. Responsibilities are Jurisdiction over the Probate of Wills, Granting of Letters after a person dies. Letters of Administration are issued, if there is no Will. The Register is an agent for the Commonwealth of Pennsylvania’s, Department of Revenue and collects Inheritance Tax for the State.