21 Pa. Stat. § 700
Whenever, heretofore or hereafter, mortgages have been or shall be duly executed and delivered to the Commonwealth of Pennsylvania, or to any officer of the Commonwealth, for its use, and have been or shall be recorded in any county or counties of the State, the Attorney General, or other officer or officers of the Commonwealth having custody thereof, shall, upon payment in full of said mortgage or mortgages, or the bonds, notes, or other writings obligatory which said mortgages were given to secure, surrender and deliver the same to the mortgagor or obligor therein, or a duly authorized agent; and the Attorney General, upon payment of the proper costs and charges, together with accrued interest, shall acknowledge satisfaction of said mortgage upon the record thereof, and cause the same to be satisfied of record, either acting by himself or through a person duly authorized by his letter of attorney to act for him.
21 P.S. § 700