To close a bank account on behalf of someone who has passed away, you must have legal authority to manage the account. If a person dies without a Will, then the proceeding filed is called administration and the property is divided according to the law.In general, you can't. The bank will not allow you to close it unless you have a letter of authorization from the probate court. Administration is the process where the Surrogate's Court officially gives out Letters of Administration to a qualified distributee (heir) of the Decedent. A letter of testamentary is a courtordered document that grants the executor of an estate the authority to manage the deceased person's assets. You'll just need the death certificate and your ID. The bank should close the account and make checks payable to the beneficiary. When a person dies intestate, typically the family will act as administrator of the estate. Gather necessary documents: The bank will want to make sure they are giving the right person the money. Addresses for all heirs listed in the will.