No unauthorized act can be made valid, retroactively, to the prejudice of third persons, without their consent. Source: CivC 1877, § 1352; CL 1887, § 3975; RCivC 1903, § 1671; RC 1919, § 1253; SDC 1939, § 3.0107.
Ratification not to work injury to third persons
SDCL § 59-2-6 — under CREATION OF AGENCY.
SDCL § 59-2-6