Employee: (1) Complete the upper portion of the form, sign, and date. A bank letter is an official document from your bank that provides important information about your business' official bank account.Get ACH for Your Business. Initial set up and routing verification generally takes ten banking days from receipt of completed form. Payee's wishing to receive payments electronically via ACH must complete the ACH Payment Agreement. To enroll in the ACH program, complete Section A of the enclosed ACH Enrollment form. Using ACH eliminates waiting for your check to arrive in the mail and any need to make a trip to the bank to deposit it. Important information about this form: • Fill out this form with the new bank account you want to connect to this. Washington State ABLE Savings Plan account. Please fill out the fields in the form to the right.