One thing for sure is that the bank will want to know the specific reasons for the removal request as the next-to-kin. To close a bank account on behalf of someone who has passed away, you must have legal authority to manage the account.• Or mail them to us at the Ohio Department of Commerce, Division of Unclaimed Funds. Next of Kin Letter is a document used to confirm who is the closes relative of the deceased that are still living. You will need a tax release, death certificate, and Letters of Authority from probate court to have access to the account. You'll need the person's Social Security number and certified copies of their death certificate for most agencies and programs. The administrator must be an Ohio resident. Send that to the County Clerk where the deceased died. Customer. I do have a complicated situation and trying to find a way around the executor. "Post-deceased" means the next of kin died after the decedent.