An Act amending the act of July 26, 1961 (P. L. 887, No. 382), entitled, as amended, "An act relating to the satisfaction of mortgages in counties of the second, second A, third, fourth, fifth, sixth, seventh and eighth class by the recording of a satisfaction piece, prescribing forms therefor, and fixing fees for the recording thereof," authorizing the use of a certified copy of the mortgage instrument.