An Arizona Petition to Modify a Child Support Order is a legal document used to request a change to the existing child support order. It is filed with the court by the non-custodial or custodial parent, depending on the situation, and must be served on the other parent. Depending on the nature of the request, the court may require a hearing to consider the facts of the case and determine if a modification is appropriate. There are two types of Arizona Petition to Modify a Child Support Order: 1. Petition for Modification of Child Support: This document is used when a parent is requesting a change in the amount of child support that is being paid. 2. Petition for Modification of Visitation and Child Support: This document is used when a parent is requesting a change in both the amount of child support that is being paid and the visitation schedule.