The Arizona Notice Of Filing Petition For Modification Of Child Custody is a legal document used to notify the other parent involved in a child custody arrangement that a petition has been filed by one of the parties to modify the existing custody agreement. This notice includes the name of the petitioner, the date the petition was filed, the court where the petition was filed, and the case number. It also includes a date by which the other parent must respond to the petition and inform the court of their position on the matter. There are two types of Arizona Notice Of Filing Petition For Modification Of Child Custody: joint custody modification petition and sole custody modification petition. The joint custody modification petition is used when both parents agree to modify the existing custody arrangement, while the sole custody modification petition is used when only one parent is seeking to modify the custody arrangement.