S.D. Codified Laws § 15-39-73
The actual cash disbursements of the prevailing party for entry fee, mailing fees, witness fees, and officers' fees shall be allowed as costs. No other costs shall be allowed either party, except by special order of the court. The court shall have power in its discretion to award costs, including attorney fees, in a sum fixed by the court, not exceeding five hundred dollars (exclusive of such cash disbursements, or in addition thereto) against any party, whether the prevailing party or not, who has set up a frivolous or vexatious claim or defense, or has made an unfair, insufficient, or misleading answer, or has otherwise sought to hamper a party or the court in securing a speedy determination of the claim upon its merits; and to enter judgment and issue execution therefor, or set off such costs against damages or costs, as justice may require.
SDCL 15-39-73