Cal. Commercial Code § 9310

(a) Except as otherwise provided in subdivision (b) and in subdivision (b) of Section 9312, 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 that satisfies any of the following conditions: (1) It is perfected under subdivision (d), (e), (f), or (g) of Section 9308. (2) It is perfected under Section 9309 when it attaches. (3) It is a security interest in property subject to a statute, regulation, or treaty described in subdivision (a) of Section 9311. (4) It is a security interest in goods in possession of a bailee which is perfected under paragraph (1) or (2) of subdivision (d) of Section 9312. (5) It is a security interest in certificated securities, documents, goods, or instruments which is perfected without filing, control, or possession under subdivision (e), (f), or (g) of Section 9312. (6) It is a security interest in collateral in the secured party’s possession under Section 9313. (7) It is a security interest in a certificated security which is perfected by delivery of the security certificate to the secured party under Section 9313. (8) It is a security interest 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 9314. (9) It is a security interest in proceeds which is perfected under Section 9315. (10) It is perfected under Section 9316. (11) It is a security interest in, or claim in or under, any policy of insurance including unearned premiums which is perfected by written notice to the insurer under paragraph (4) of subdivision (b) of Section 9312. (12) It is a security interest in chattel paper which is perfected by possession and control under Section 9314.1. (c) If a secured party assigns a perfected security interest or agricultural lien, a filing under this division is not required to continue the perfected status of the security interest against creditors of and transferees from the original debtor.