S.D. Codified Laws § 47-1A-1323
A shareholder who receives notice pursuant to §§ 47-1A-1322 and 47-1A-1322.1 and who wishes to exercise appraisal rights must certify on the form sent by the corporation whether the beneficial owner of such shares acquired beneficial ownership of the shares before the date required to be set forth in the notice pursuant to subdivision 47-1A-1322.1(1). If a shareholder fails to make this certification, the corporation may elect to treat the shareholder's shares as after-acquired shares under §§ 47-1A-1325 to 47-1A-1325.3, inclusive. In addition, a shareholder who wishes to exercise appraisal rights must execute and return the form and, in the case of certificated shares, deposit the shareholder's certificates in accordance with the terms of the notice by the date referred to in the notice pursuant to subsection 47-1A-1322.1(2)(b). Once a shareholder deposits that shareholder's certificates or, in the case of uncertificated shares, returns the executed forms, that shareholder loses all rights as a shareholder, unless the shareholder withdraws pursuant to § 47-1A-1322.1.
SDCL 47-1A-1323