21 Pa. Stat. § 625
For the purpose of obtaining with accuracy the precise residence of all mortgagees, assignees, and persons to whom interest is payable on articles of agreement, it shall be the duty of the recorder of deeds in each county, whenever a mortgage, assignment, or agreement given to secure the payment of money, shall be presented to him for record, to refuse the same, unless the said mortgage, assignment, or agreement has attached thereto, and made part of said mortgage, assignment, or agreement, a certificate signed by said mortgagee, assignee, or person entitled to interest, or his, her or their duly authorized attorney or agent, setting forth the precise residence of such mortgagee, assignee, or person entitled to interest; said certificate to be recorded with said mortgage, assignment, or agreement; and therefrom the said recorder shall prepare and deliver, at stated intervals, to the proper Board of Revision of Taxes, or other officials charged with the assessment of State tax, a list of said mortgages, assignments, and agreements, with the names and residences of said mortgagees, assignees, or persons entitled to interest, with the amount and date of said mortgages, assignments, and articles of agreement, with the date of recording and the properties upon which the debts are secured.
21 P.S. § 625