Background
Robert Barnes and Tiffany Richardson were never married but have two minor daughters, born in 2011 and 2013. A 2017 Washington state child support order covering the older child set Father’s monthly obligation at $3,500—a substantial upward deviation from the Washington guidelines—but did not cover the younger daughter because paternity had not yet been established. Father maintained that the elevated amount was intended by agreement to cover both children. After Mother relocated to Arizona with the children, Father petitioned in Arizona in 2019 to establish paternity, parenting time, and support for the younger child. The parties entered a 2021 consent decree addressing paternity and parenting time but deferred child support, believing only Washington had jurisdiction over the issue.
Father registered the Washington order in Arizona in March 2021 and filed separate petitions to modify child support for both children. In December 2021 he petitioned to modify support for the younger daughter. While those petitions remained pending, a November 2023 temporary order required Father to pay child support for her under the Arizona Child Support Guidelines. Following a February 2025 evidentiary hearing, the Maricopa County Superior Court ordered Father to pay $36,225 in past support under A.R.S. § 25-320(C) and an additional $296,497 in retroactive support under A.R.S. § 25-809 for overlapping periods, set ongoing support at $2,509 per month for both children, and awarded Mother attorneys’ fees. The court also summarily denied Father’s 28-page motion to alter or amend—more than ten pages over the 17-page limit set by Arizona Rule of Family Law Procedure 35.
The Court’s Holding
The Court of Appeals affirmed in part and vacated and remanded in part. On the threshold question of whether the Washington order covered the younger daughter, the court held it did not: courts must interpret judgments on their face without resort to parol evidence, and the Washington order named only the older child. Moreover, the Washington court lacked jurisdiction to order support for the younger daughter before paternity was established, so accepting Father’s reading would require assuming the court acted beyond its authority. Because no permanent child support order had ever existed for the younger daughter, the superior court correctly treated Father’s petition as one to establish—not modify—support, making A.R.S. § 25-809 (the paternity-proceedings statute) the applicable retroactivity provision rather than A.R.S. § 25-327(A).
The court vacated the $36,225 past-support award under A.R.S. § 25-320(C) because that dissolution-chapter statute does not apply to a paternity action between parties who were never married; only A.R.S. § 25-809 controls here. The court also found that the $296,497 retroactive award was miscalculated—the statute obligates the court to reach back to the filing of the original petition (July 2, 2019), not October 31, 2021 as the superior court used—and Mother herself conceded on appeal that the figure was an overcalculation. The court further remanded recalculation of both temporary and ongoing child support because the superior court used 120 parenting-time days for Mother with the younger daughter, a figure unsupported by the actual parenting schedule. The court affirmed the attorneys’ fees award and the summary denial of Father’s overlength Rule 83 motion.
Key Takeaways
- Arizona courts must interpret child support orders on their face; parol evidence of the parties’ subjective intent is inadmissible, and a foreign order receives the same treatment as a domestic judgment.
- In a paternity action between parties who were never married, A.R.S. § 25-809—not the dissolution-chapter statute A.R.S. § 25-320(C)—governs retroactive child support; awarding past support under both statutes for overlapping periods is reversible error.
- Under A.R.S. § 25-809, the mandatory look-back period for retroactive support runs from the date the paternity petition was filed, not from a later date chosen by the court.
- Arizona Rule of Family Law Procedure 35 expressly authorizes a court to summarily deny a motion that exceeds the 17-page limit; a party who does not seek leave to file an overlength brief cannot complain of the consequence on appeal.
- A financial disparity between the parties alone is sufficient to support an attorneys’ fees award under A.R.S. § 25-324(A); an applicant need not also show that the opposing party took unreasonable positions.
Why It Matters
This decision reinforces strict limits on how Arizona courts—and litigants—may use extrinsic evidence to reinterpret child support orders. Practitioners cannot rely on side agreements or acknowledged intent to expand an order’s coverage to a child not named in it, particularly when the issuing court lacked jurisdiction over that child at the time. The ruling also clarifies the boundary between Arizona’s dissolution and paternity statutes for retroactive support, a distinction that has practical dollar consequences in cases involving parents who were never married.
For family law attorneys, the case is also a procedural reminder: Arizona’s page limits on motions are enforced, and the consequences—summary denial—can foreclose otherwise viable arguments. Equitable defenses such as waiver and estoppel must be raised before the trial court, not for the first time in a post-judgment motion or on appeal, or they are lost.