A bank closure letter may be needed if you want to close a bank account without having to go to your bank's physical location. Please accept this letter as my written authorization to close the following account(s) at your financial institution.Citizens Bank Account Closure Letter Instructions. This PDF file contains a sample account closure letter to be used when requesting a bank account closure. Information and instructions, including forms for Uniform Commercial Code (UCC) filings with the Utah Division of Corporations and Commercial Code. This letter is to inform you I am closing my accounts at your bank. Information and instructions, including forms for Uniform Commercial Code (UCC) filings with the Utah Division of Corporations and Commercial Code. Notify banks and financial institutions to close your spouse's accounts. Certified copy of the death certificate. Millions of dollars in unclaimed property are turned over to the state every year.