SDCL § 10-25-4: Additional persons entitled to notice.

If the real property is situated within a municipality, notice also shall be served on:

(1) The holder of any special assessment certificate that is a lien upon the real property;

(2) The holder of any tax certificate issued upon sale for any special assessment; and

(3) The municipal finance officer.

The service provided for in this section may be made only upon each person described in this section whose name and post-office address is known to the holder of the tax certificate or may be obtained from the municipal finance officer or the treasurer, as provided in § 10-25-7.