Every satisfaction piece shall contain the name of the mortgagor and mortgagee, the date and amount of the mortgage, a reference by book and page (or appropriate designation in the case of microfilm recording) to the record of the original mortgage, a brief description of the real estate, and any assignment or assignments thereof. The satisfaction piece shall be accompanied, on presentation for recording, by the original mortgage instrument. Nothing herein contained shall impose liability on any city or county of the first class for any mistake, error or inaccuracy found in any satisfaction piece filed by any mortgagee which shall appear complete and correct at the time of its filing.