Means of proving instrument not acknowledged

Proof of the execution of an instrument, when not acknowledged, may be made either: (1) By the party executing it, or either of them; (2) By a subscribing witness; or (3) By other witnesses, in cases mentioned in §§ 18-4-19 and 18-4-20 , relating to proof of handwriting. Source: CivC 1877, § 662; CL 1887, § 3283; RCivC 1903, § 976; RC 1919, § 582; SDC 1939, § 51.1610.