A bank letter is an official document from your bank that provides important information about your business' official bank account. To complete this form, you'll need: Your account number; Bank routing transit number; Type of account (checking or savings).1) I need to know where to fill in my bank routing number and my bank account number to use as direct deposit. What is direct deposit? Direct deposit is an electronic method of depositing payments into your account at a bank or other financial institution of your choice. Bank name, routing number, and account number. It is all written on your check. You must return this form with a letter from your bank that includes your account number and bank routing number. Instructions: Please complete the information below along with your signature and date. Looking for MIDFLORIDA account forms?