You'll need to know: Your Bank of America account and ABA routing numbers; Your employer's name and address. Locate my account and routing number.Include your name, address and account number on the letter. A bank letter is an official document from your bank that provides important information about your business' official bank account. Bank of America provides notary services free of charge in all financial centers. Schedule an appointment and learn what is needed for a notarization. Find out how ACH services can help you get better control of payment processing and transactions for your business. Step 1 Fill out the attached Letter of Instruction. •If you are an Individual making the request, please complete Sections 1, 2, and 4 on the next page. Find frequently asked questions about Bank of America.