Unknown debtor or secondary obligor.

(1) To a person that is a debtor or obligor, unless the secured party knows: (A) That the person is a debtor or obligor; (B) The identity of the person; and (C) How to communicate with the person; or (2) To a secured party or lienholder that has filed a financing statement against a person, unless the secured party knows: (A) That the person is a debtor; and (B) The identity of the person. (b) What the secured party knows is to be determined in the light of the good faith obligations of the secured party.