One thing for sure is that the bank will want to know the specific reasons for the removal request as the next-to-kin. My dad passed away two months ago.Got the death certificate in hand and went to the bank to close his account. Notify Bank of America. We'll ask you for the deceased customer's full legal name and Social Security number to identify their accounts. Next of Kin Letter is a document used to confirm who is the closes relative of the deceased that are still living. A death claim application letter for a bank is basically a letter to the bank stating that the account holder has been deceased. This document provides instructions for a scam known as the "Next of Kin" or "N. A: In this situation, the bank is likely requesting documentation to establish your legal right to claim the funds in your mother's account. The person has to submit an application to the bank informing about the death.