S.D. Codified Laws § 15-2-29
Current with legislation signed by the governor on or before 3/6/2024
No acknowledgment or promise is sufficient evidence of a new or continuing contract, whereby to take the case out of the operation of this chapter, unless the same be contained in some writing signed by the party to be charged thereby; but this section shall not alter the effect of any payment of principal or interest.
SDCL 15-2-29