One thing for sure is that the bank will want to know the specific reasons for the removal request as the next-to-kin. Create a professional next of kin letter.Build and share in seconds. Notify Bank of America. We'll ask you for the deceased customer's full legal name and Social Security number to identify their accounts. Discover the precise steps to secure Letters of Testamentary in California. Our comprehensive guide makes the process straightforward and hassle-free. Next of Kin Letter is a document used to confirm who is the closes relative of the deceased that are still living. Without a will, your next of kin may inherit your assets when you die. Well, as the beneficiary, you should be able to call the company and get them a death certificate to pay you out.