A. Enter the name and address of the financial institution authorized to conduct transaction. Complete Section 2 if you are changing your banking information.IT YOURSELF (DIY) DOCUMENT⭐ ➡️ Not sure how to write an Authority Letter? In order to make a bank authorization letter, it's important to empower someone with bank relates issues, for example in taking collecting or sign on documents. (current address), County of. Additionally, this form provides OBM the authority to debit any erroneous credit or transfers to the account in the amount of the transfer. Bank Authorization Letter Samples.