New South Wales Consolidated Acts(cf Act No 48, 1930, ss 18, 18A)
Where the principal sum secured by a mortgage is paid after the date for
payment fixed by the mortgage, but upon or before the
prescribed date for repayment, or where the court in pursuance of section
nineteen has extended the date for payment, upon or before such extended date,
the mortgagee shall not be entitled to receive any payment by way of interest
in lieu of notice.