1. (a) General rule: perfection by filing. — Except as otherwise provided in subsection (b) and Section 9-312(b), a financing statement must be filed to perfect all security interests and agricultural liens.

2. (b) Exceptions: filing not necessary. — The filing of a financing statement is not necessary to perfect a security interest:

   1. (1) that is perfected under Section 9-308(d), (e), (f), or (g);
   2. (2) that is perfected under Section 9-309 when it attaches;
   3. (3) in property subject to a statute, regulation, or treaty described in Section 9-311(a);
   4. (4) in goods in possession of a bailee which is perfected under Section 9-312(d)(1) or (2);
   5. (5) in certificated securities, documents, goods, or instruments which is perfected without filing, control, or possession under Section 9-312(e), (f), or (g);
   6. (6) in collateral in the secured party’s possession under Section 9-313;
   7. (7) in a certificated security which is perfected by delivery of the security certificate to the secured party under Section 9-313;
   8. (8) in controllable accounts, controllable electronic records, controllable payment intangibles, deposit accounts, electronic documents, investment property, or letter-of-credit rights which is perfected by control under Section 9-314;

   (8.1) in chattel paper which is perfected by possession and control under Section 9-314A;

   1. (9) in proceeds which is perfected under Section 9-315; or
   2. (10) that is perfected under Section 9-316.
3. (c) Assignment of perfected security interest. — If a secured party assigns a perfected security interest or agricultural lien, a filing under this Article is not required to continue the perfected status of the security interest against creditors of and transferees from the original debtor.

72 Del. Laws, c. 401, § 1; 74 Del. Laws, c. 332, §§ 53, 54; 84 Del. Laws, c. 174, § 57