To close a bank account on behalf of someone who has passed away, you must have legal authority to manage the account. An Affidavit of Death is used to close accounts, receive benefits, or take ownership of property, real estate, or securities.A death claim application letter for a bank is basically a letter to the bank stating that the account holder has been deceased. Most banks will have their own individual procedure for closing a bank account after the title holder of the account passes away. You'll need the person's Social Security number and certified copies of their death certificate for most agencies and programs. Social Security and Medicare. Deceased's bank accounts. Yes you can remove the deceased persons name. Usually you will need a death certificate and updated account agreement. The bank must review the safe deposit box lease agreement documents to determine who may access the box after the death of an owner.