A mortgage on real property may be released by written instrument, duly signed and acknowledged and recorded in the office of the county clerk as register of deeds.
R.L. 1910, § 4024; Laws 1953, p. 178, § 1; Laws 1977, c. 156, § 3, eff. Oct. 1, 1977; Laws 1978, c. 92, § 2, eff. Oct. 1, 1978.