From and after the passage of this act, it shall be the duty of the recorders of deeds, of the several counties of this commonwealth, to enter upon the margin of the record of any mortgages, the book and page wherein any assignment or assignments of the same are recorded, together with the date of such assignment, for which service the recorders aforesaid shall charge and be entitled to receive such fee as is provided by law unless the recorder of deeds microfilms the mortgages in which case the assignment shall be recorded without a marginal notation.