S.D. Codified Laws § 29A-6-306 (2026)
The designation of a TOD beneficiary on a registration in beneficiary form has no effect on ownership until the owner's death. A registration of a security in beneficiary form may be canceled or changed at any time by the sole owner or all then surviving owners without the consent of the beneficiary.
Source: SL 1995, ch 168 , § 6-306.