S.D. Codified Laws § 10-23-2.5
Any property owner of a homestead that receives a notice of delinquent taxes or a notice pursuant to § 10-23-2.1 who will be seventy years of age or older by the date of the tax certificate sale for the homestead shall notify the treasurer before the sale that the owner occupies the home and meets the age requirement for the homestead exemption provided pursuant to chapter 43-31. If the owner fails to notify the treasurer that the owner occupies the home and meets or will meet the age requirement for the homestead exemption, the owner shall be held responsible for any costs incurred related to the sale of the tax certificate and the payment of the taxes and interest on the tax certificate. The notice required by § 10-23-2.1 shall include a statement informing the owner of each requirement imposed by this section and the applicable penalties.
SDCL 10-23-2.5