Post-Decree Modifications Checklist

Request a certified copy from the Superior Court clerk in the county where your divorce was finalized. You'll need this as the baseline document in any modification proceeding. Arizona courts will not process a modification petition without reference to the existing order.

If any modifications or agreements have been made since the original decree — even informal consent decrees — gather all of them. Courts look at the most recent operative order, not necessarily the original divorce decree.

Arizona law allows modification of child support, spousal maintenance, legal decision-making (custody), and parenting time. Property division, however, is generally final and cannot be modified. Be precise: modifying parenting time follows different rules (A.R.S. § 25-411) than modifying child support (A.R.S. § 25-503).

Under A.R.S. § 25-411, legal decision-making and parenting time orders generally cannot be modified within one year of the prior order unless the child's physical or emotional health is endangered. Child support can typically be modified after 3 years or upon a 15% change in the calculated amount.

Post-decree petitions are generally filed in the same county where the original divorce was finalized, unless a formal transfer of jurisdiction has occurred. Arizona's 15 Superior Courts each have their own local rules — check the specific county court's self-help center website.

This is the legal threshold for any modification in Arizona. The change must be both 'substantial' (significant, not minor) and 'continuing' (not temporary). Examples include a job loss, major income increase, serious illness, a child's changing needs, or a parent's relocation. Vague or temporary changes will likely be dismissed.

If seeking to modify child support or spousal maintenance due to a job change, collect pay stubs, termination letters, unemployment filings, new employment offer letters, tax returns (last 2 years), and bank statements. Arizona uses the Income Shares Model for child support calculations (A.R.S. § 25-320 and the AZ Child Support Guidelines).

Relevant evidence may include school records, medical records, therapist letters, police reports, witnesses, photos, or communications (texts/emails) showing why the current arrangement no longer serves the child's best interests under A.R.S. § 25-403. Arizona courts focus exclusively on the best interests of the child.

Judges appreciate a clear, factual chronology. Write a concise narrative — with dates — of what has changed since the decree. Keep it factual and child-focused if children are involved. Avoid emotional language or attacks on the other party.

Teachers, pediatricians, therapists, employers, or other neutral parties can provide letters or be called as witnesses. If a child's mental health professional is involved, their input can be powerful evidence for a parenting plan modification in Arizona.

Use the Arizona Supreme Court's online Child Support Calculator (azcourthelp.gov) to determine the new guideline amount. A modification is typically warranted if the new amount differs by 15% or more from the current order, or if 3 years have passed since the last review (A.R.S. § 25-503(E)).

Arizona courts require both parties to complete an Affidavit of Financial Information (AFI) in all child support modification cases. This document details income, expenses, assets, and debts. Accuracy is critical — false statements can result in contempt or sanctions.

Arizona's child support guidelines factor in childcare costs, health insurance premiums, and extraordinary educational expenses. Collect receipts, invoices, and insurance premium statements showing current costs, which may differ significantly from the time of the original decree.

Past-due child support (arrears) cannot be retroactively modified in Arizona — you can only change future support. If the other party owes arrears, note this separately. Arizona DES/DCSS (Division of Child Support Services) can assist with enforcement, including wage garnishment and license suspension.

Under A.R.S. § 25-411, you generally cannot petition to modify legal decision-making or parenting time within one year of the prior order — unless you allege the child's present environment may seriously endanger physical, mental, moral, or emotional health. Confirm eligibility before filing to avoid dismissal.

Arizona requires a detailed Parenting Plan for any custody modification. It must address legal decision-making (sole or joint), parenting time schedule, holiday/vacation schedule, and dispute resolution procedures. Use the Arizona Judicial Branch's Parenting Plan template available at azcourthelp.gov.

Many Arizona Superior Courts automatically schedule an RMC in contested modification cases. Mediation is often ordered and can save thousands in attorney fees. Maricopa, Pima, and other large counties have family court mediation programs. Agreements reached in mediation are submitted to the judge for approval.

In high-conflict post-decree custody cases, the Arizona court may appoint a Best Interests Attorney (BIA) for the child or a Parenting Coordinator (PC) to help resolve ongoing disputes without repeated court hearings. You or the other party can request this, or the judge may order it sua sponte.

Arizona courts may consider a child's wishes as one factor under A.R.S. § 25-403(A)(4) — there is no fixed age, but courts typically give more weight to the preferences of older, more mature children. A child's preference alone is never determinative; the court's focus remains on the child's best interests.

Under A.R.S. § 25-408, a parent wishing to relocate with a minor child must give the other parent at least 45 days' advance written notice before the move. The notice must include the intended new address, city, and state. Failure to provide proper notice can result in serious legal consequences, including reversal of the move.

If the other parent files an objection within 30 days of receiving notice, the relocating parent must petition the court for permission. The court will hold a hearing and evaluate the move using best-interests factors under A.R.S. § 25-408(G), including the reason for the move, impact on the child's relationship with the non-relocating parent, and the child's ties to Arizona.

Courts look favorably on relocations tied to verifiable reasons: a new job offer (provide offer letter), proximity to extended family support, or improved educational opportunities. Be prepared to show how the child's relationship with the other parent will be preserved — such as a proposed long-distance parenting plan with expanded vacation time.

A well-crafted long-distance parenting plan demonstrates good faith and increases approval odds. Include extended holiday breaks, summer parenting time for the non-relocating parent, virtual visitation provisions, and a cost-sharing arrangement for travel expenses.

Keep a detailed log (with dates, times, and descriptions) of every violation — missed exchanges, unpaid support, denied parenting time, etc. Save all texts, emails, and voicemails as evidence. Courts in Arizona take violations of court orders seriously, and thorough documentation is essential.

If the other party is willfully violating the court order, you can file a Petition for Order to Show Cause asking the court to hold them in contempt under A.R.S. § 25-414. Contempt remedies in Arizona can include fines, makeup parenting time, payment of your attorney's fees, and in extreme cases, jail time.

Arizona's Division of Child Support Services (DCSS) has powerful enforcement tools that don't require a court hearing, including wage garnishment (income withholding), interception of tax refunds, suspension of driver's and professional licenses, and passport denial. Contact DCSS or enroll online at des.az.gov.

Under A.R.S. § 25-414, if a parent has wrongfully denied parenting time, the court can order makeup parenting time. Document every denial with contemporaneous records. Courts may also require the offending parent to pay the other's attorney's fees related to the enforcement action.

If a child's safety is at immediate risk or a parent has relocated without notice, you may file for emergency orders (ex parte) under A.R.S. § 25-411(J). Emergency orders are temporary and require a follow-up hearing, typically within 10 days. Evidence of immediacy and risk is required.

Use the Arizona Judicial Branch's standardized forms available at azcourthelp.gov. Common forms include the Petition to Modify Child Support, Petition to Modify Legal Decision-Making and Parenting Time, and related supporting documents. Each county may have additional local forms — verify with your county's Superior Court clerk.

Post-decree modification filing fees in Arizona typically range from $75–$300 depending on the county and type of petition. If you cannot afford the fee, submit an Application for Deferral or Waiver of Court Fees and Costs (Form AAFC10f). Income-qualified applicants may qualify for a full waiver.

The other party must be formally served with the Petition and Summons per Arizona Rules of Family Law Procedure. You can use a private process server, the county sheriff, or certified mail (if the other party agrees to accept service). File a Proof of Service with the court once completed.

The court may issue temporary (pendente lite) orders while the modification is pending. These orders are enforceable immediately and must be followed, even if you disagree with them. Violating temporary orders can seriously damage your credibility with the judge.

Missing a scheduled court date in Arizona can result in a default ruling against you. Confirm all hearing dates on your county's Superior Court case management portal (e.g., Maricopa: superiorcourt.maricopa.gov). Arrive early, dress professionally, and bring organized copies of all relevant documents.

While some straightforward modifications (e.g., agreed child support adjustments) can be handled DIY for $400–$600, contested cases involving custody, relocation, or contempt can cost $15,000–$30,000+ if litigated. An attorney-assisted uncontested modification typically runs $1,500–$3,500. Many Arizona family law attorneys offer free initial consultations — consider at least a one-time strategy session.

A verbal agreement or unsigned document is not enforceable. The modified order must be signed by a Superior Court judge and filed with the court clerk. Request a file-stamped copy for your records. Update any automatic payments, wage garnishment orders, or DES/DCSS records to reflect the new amounts immediately.