S.D. Codified Laws § 53-7-7 (2026)
Performance of the conditions of a proposal or the acceptance of the consideration offered with a proposal is an acceptance of the proposal.
Source: CivC 1877, § 895; CL 1887, § 3519; RCivC 1903, § 1213; RC 1919, § 828; SDC 1939, § 10.0319.