South Dakota Codified Laws
Chapter 01 - Actual and Constructive Notice
Section 17-1-4 - Circumstances constituting constructive notice.

17-1-4. Circumstances constituting constructive notice.
Every person who has actual notice of circumstances sufficient to put a prudent man upon inquiry as to a particular fact, and who omits to make such inquiry with reasonable diligence, is deemed to have constructive notice of the fact itself.

Source: CivC 1877, §2109; CL 1887, §4743; RCivC 1903, §2452; RC 1919, §15; SDC 1939, §65.0504.