South Dakota Codified Laws
Chapter 13 - Cancellation Of Instruments
Section 21-13-2 - Partial cancellation of instrument.

21-13-2. Partial cancellation of instrument.
Where an instrument is evidence of different rights or obligations, it may be canceled in part and allowed to stand for the residue.

Source: CivC 1877, §2013; CL 1887, §4646; RCivC 1903, §2358; RC 1919, §2029; SDC 1939 & Supp 1960, §37.0802.