S.D. Codified Laws § 21-47-22
All certificates of mortgage foreclosure sale of real property by action recorded prior to January 1, 1992, and the records of such certificates, are hereby legalized, cured, and validated, and such certificates and the record thereof are made and declared to be in every manner and respect of like force and effect as though such certificates had been recorded within ten days from the date of sale as required by § 21-48-19.
If any person has any vested right in any real property by reason of any omission referred to in this section, and if no action or proceeding to enforce such right was commenced prior to July 1, 1993, such right shall be forever barred. No action or proceeding brought involving real property shall be of any force or effect, or maintainable in any court of this state, unless prior to July 1, 1993, there was recorded in the office of the register of deeds of the county in which the real property affected is situated, a notice of the pendency of such action, in accordance with chapter 15-10.
SDCL 21-47-22