S.D. Codified Laws § 15-9-16
Current with legislation signed by the governor on or before 3/6/2024
If it be made to appear by affidavit to the satisfaction of the court, and the court shall find, that the place of residence of the person to be served is at a certain specified place without this state, and his post office address, whether within or without this state, be likewise shown and established, it shall not be necessary to show nor for the court to find, that such persons cannot after due diligence be found and served personally within this state.
SDCL 15-9-16