Mo. Rev. Stat. § 400.9-605: Unknown debtor or secondary obligor.

A secured party does not owe a duty based on its status as secured party:

(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.