S.D. Codified Laws § 57A-9-310
When filing required to perfect security interest or agricultural lien--Security interests and agricultural liens to which filing provisions do not apply
(a) Except as otherwise provided in subsection (b) and § 57A-9-312 (b), a financing statement must be filed to perfect all security interests and agricultural liens.
(b) The filing of a financing statement is not necessary to perfect a security interest:
(1) That is perfected under § 57A-9-308 (d), (e), (f), or (g);
(2) That is perfected under § 57A-9-309 when it attaches;
(3) In property subject to a statute, regulation, or treaty described in § 57A-9-311 (a);
(4) In goods in possession of a bailee which is perfected under § 57A-9-312 (d)(1) or (2);
(5) In certificated securities, documents, goods, or instruments which is perfected without filing, control, or possession under § 57A-9-312 (e), (f), or (g);
(6) In collateral in the secured party's possession under § 57A-9-313 ;
(7) In a certificated security which is perfected by delivery of the security certificate to the secured party under § 57A-9-313 ;
(8) In controllable accounts, controllable electronic records, controllable payment intangibles, deposit accounts, investment property, or letter-of-credit rights which is perfected by control under § 57A-9-314 ;
(8.1) In chattel paper which is perfected by possession and control under § 57A-9-314.1 ;
(9) In proceeds which is perfected under § 57A-9-315 ;
(10) That is perfected under § 57A-9-316 ; or
(11) Subject to §§ 49-34-11 to 49-34-11.4 , inclusive.
(c) If a secured party assigns a perfected security interest or agricultural lien, a filing under this chapter is not required to continue the perfected status of the security interest against creditors of and transferees from the original debtor.
Source: SL 2000, ch 231; SL 2009, ch 254, § 830; SL 2024, ch 198, § 60.