(c) Collateral in possession of person other than debtor. With respect to collateral other than certificated securities and goods covered by a document, a secured party takes possession of collateral in the possession of a person other than the debtor, the secured party, or a lessee of the collateral from the debtor in the ordinary course of the debtor's business, when:
(1) the person in possession authenticates a record acknowledging that it holds possession of the collateral for the secured party's benefit; or (2) the person takes possession of the collateral after having authenticated a record acknowledging that it will hold possession of collateral for the secured party's benefit.