Subsection (d) [Maine cite subsection (4)] takes a different approach to the problem of goods covered by a nonnegotiable document. Here, title to the goods is not looked on as being locked up in the document, and the secured party may perfect its security interest directly in the goods by filing as to them. The subsection provides two other methods of perfection: issuance of the document in the secured party's name (as consignee of a straight bill of lading or the person to whom delivery would be made under a nonnegotiable warehouse receipt) and receipt of notification of the secured party's interest by the bailee. Perfection under subsection (d) [Maine cite subsection (4)] occurs when the bailee receives notification of the secured party's interest in the goods, regardless of who sends the notification. Receipt of notification is effective to perfect, regardless of whether the bailee responds. Unlike former Section 9-304(3), from which it derives, subsection (d) [Maine cite subsection (4)] does not apply to goods in the possession of a bailee who has not issued a document of title. Section 9-313(c) [Maine cite section 9-1313, subsection (3)] covers that case and provides that perfection by possession as to goods not covered by a document requires the bailee's acknowledgment.

8. Temporary Perfection Without Having First Otherwise Perfected. Subsection (e) [Maine cite subsection (5)] follows former Section 9-304(4) in giving perfected status to security interests in certificated securities, instruments, and negotiable documents for a short period (reduced from 21 to 20 days, which is the time period generally applicable in this Article), although there has been no filing and the collateral is in the debtor's possession. The 20-day temporary perfection runs from the date of attachment. There is no limitation on the purpose for which the debtor is in possession, but the secured party must have given "new value" (defined in Section 9-102 [Maine cite section 9-1102) under an authenticated security agreement.

9. Maintaining Perfection After Surrendering Possession. There are a variety of legitimate reasons-many of them are described in subsections (f) and (g) [Maine cite subsections (6) and (7)]-why certain types of collateral must be released temporarily to a debtor. No useful purpose would be served by