To close a bank account on behalf of someone who has passed away, you must have legal authority to manage the account. It explains in plain English how the process works and includes step-by-step instructions on how to fill out the necessary forms and paperwork.Get a copy of the death certificate. Typically, an application to probate a will must be filed within four (4) years of the date of death of the decedent. What is a letter of testamentary? Wells Fargo will not release funds on deposit in their bank without an order from the probate court. You should contact a probate lawyer. Probate is the legal process to distribute a person's property after they die. My mother passed away. What do I do to close out bank account.