Submit the form at least two weeks prior to the payment due date. What if we change banks?Notify us in advance. A bank letter is an official document from your bank that provides important information about your business' official bank account. To have a Treasury Management representative contact you, simply complete the form below. Please complete the information below: I. (full name) authorize Nevada Special Utility District to charge my bank account. Enroll customers in lobby, batch and submit ENR enrollments through ACH from the financial institution. Las Vegas NV 89155-1210. Fill in the details for your new template. Include Source Account, Description, and default amounts for each recipient who should be included.