21 Pa. Stat. § 733
It shall be lawful for any person or persons, natural or artificial, holding lands encumbered by a mortgage, judgment, recognizance, or other security, after the same shall become due and payable, his or their agent, attorney, or terre tenant, to tender to the owner or owners of such mortgage, judgment, recognizance, or other security, the full sum of money due thereon, including interest and any other charges due, and, upon such tender, to require the owner or owners to assign and transfer to such person or persons as the owner of the encumbered property may name, such mortgage, judgment, recognizance, or other security. Such assignment shall create no personal liability on the part of the assignor, by way of implied warranty, or otherwise, and any such assignment shall be without recourse.
21 P.S. § 733