Inicio Sign Up for AutoPay Today Sign Up for AutoPay Today Posted: Monday, November 1, 2021 Mesa Water offers online bill pay for a speedier payment experience. Never miss a payment by selecting AutoPay, which automatically pays the invoice amount on the due date. Customers can use a checking account or credit card for this service. Now through December 20, Invoice Cloud, our payment platform, will automatically enter customers who enroll or are currently enrolled in AutoPay, into a sweepstakes for a chance to win gift cards and more! Sign up for AutoPay at MesaWater.org/BillPay.