One thing for sure is that the bank will want to know the specific reasons for the removal request as the next-to-kin. Notify Bank of America.We'll ask you for the deceased customer's full legal name and Social Security number to identify their accounts. A death claim application letter for a bank is basically a letter to the bank stating that the account holder has been deceased. Next of Kin Letter is a document used to confirm who is the closes relative of the deceased that are still living. To close a bank account on behalf of someone who has passed away, you must have legal authority to manage the account. A death claim letter format for bank is straightforward. Moreover, you just have to submit documents like a death certificate, ID proof, etc. A letter of testamentary is a courtordered document that grants the executor of an estate the authority to manage the deceased person's assets. When a loved one passes away, managing their estate can be a daunting task.