(a) 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.
(b) The filing of a financing statement is not necessary to perfect a security interest:
(1) that is perfected under Section 9.308(d), (e), (f), or (g);
(2) that is perfected under Section 9.309 when it attaches;
(3) in property subject to a statute, regulation, or treaty described in Section 9.311(a);
(4) in goods in possession of a bailee that is perfected under Section 9.312(d)(1) or (2);
(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) in collateral in the secured party's possession under Section 9.313;
(7) in a certificated security that is perfected by delivery of the security certificate to the secured party under Section 9.313;
(8) in deposit accounts, electronic chattel paper, electronic documents, investment property, virtual currencies, or letter-of-credit rights that is perfected by control under Section 9.314;
(9) in proceeds that is perfected under Section 9.315; or
(10) that is perfected under Section 9.316.
(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.
Official text of the Texas Business and Commerce Code as published by the Texas Legislative Council.