Credit balance refunds are processed weekly, typically on Thursday. In this article, we'll show you how to write a refund request letter template that not only grabs attention but also persuades companies to act in your favor.We hope this email finds you well. AZ Child Support Portal. Make child support payments, view your account information, send emails and update your contact information. We also accept credit and debit card payments made in person in the Treasurers office at the Pima County Public Service Center, 240 N. Stone Ave.