S.D. Codified Laws § 55-7-3
A thing done "in good faith" defined
A thing is done "in good faith" within the meaning of §§ 55-7-2 to 55-7-15 , inclusive, when it is in fact done honestly, whether it be done negligently or not.
Source: SL 1943, ch 19, § 1; SDC Supp 1960, § 6.0701 (2).