SDCL § 21-45-3: Persons to whom summons directed--General direction to unknown persons.

The summons in an action brought pursuant to § 21-45-1 must be directed to all the joint tenants and tenants in common, and all persons having an interest in, or any lien of record by mortgage, judgment, or otherwise, upon the property or upon any particular portion thereof; and if it appears necessary to adjudicate the rights of unknown claimants of any kind, it may contain a general direction as follows: to all persons unknown who have or claim to have, any interest in the property described in the complaint.