You can write a letter, sign it and hand it to a bank professional. They will accept the letter but, may still have you sign their form.Dear Sir, I am writing in context with my account number 444-555-666 with your prestigious bank. Enclose a copy of your voided check or pre-printed savings deposit slip with banking numbers printed on the bottom. Formal Authorization Letter to Bank for Money Withdrawal Dear Sir, I am writing in context with my account number 444-555-666 with your prestigious bank. Authorization Letter Claiming A Package. A court must grant someone else the power to withdraw money and close the account. Truong had set up fake loan applications to withdraw money from the bank from 2012 to 2022. Authorize someone to make a withdrawal. Giving someone your bank card or account information is a way to self-authorize them to make a withdrawal.