How to File a Probate Petition in Maricopa County

If someone close to you has passed away and owned property in Maricopa County, you'll eventually need to file a petition for probate with the court. This isn't optional without it, you can't legally manage or distribute the deceased person's assets. The process involves specific forms, strict filing rules, and deadlines that catch many people off guard. This guide walks you through each step so you know exactly what to do, where to go, and what to avoid.

What does filing a petition for probate actually mean?

A petition for probate is a formal request you submit to the Maricopa County Superior Court asking to be appointed as the personal representative (executor) of a deceased person's estate. Once the court approves this petition, you gain the legal authority to collect assets, pay debts, and distribute property according to the will or according to Arizona law if there's no will.

In Maricopa County, probate cases are handled by the Maricopa County Superior Court, Probate and Mental Health Division. You'll file your documents at one of the court's locations, typically in downtown Phoenix at the Court Tower, 201 W. Jefferson Street.

There are different types of probate in Arizona, but the most common ones in Maricopa County include:

Informal probate simpler, used when there's no dispute about the will or who should serve as executor
Formal probate required when there are disputes, unclear will provisions, or contested appointments
Supervised probate the court oversees every step, used in complex or high-conflict situations

Most people filing for the first time will pursue informal probate, which is faster and requires less court involvement.

What documents do you need before you file?

Gathering your paperwork before you start filling out forms saves you from frustrating delays. Maricopa County has specific requirements, and missing even one document can send you back to square one.

Here's what you'll need to have ready:

The original will (if one exists) photocopies won't be accepted by the court
Certified copy of the death certificate
A completed Petition for Probate (Form PB) from the Arizona Supreme Court's approved forms
The Information to Heirs and Devisees form
A Statement of Claim or any relevant creditor information
The decedent's personal information full legal name, date of death, last known address, and Social Security number
Names and addresses of all heirs, beneficiaries, and devisees

If you need a detailed breakdown of required paperwork, our guide on what paperwork an executor needs to open a probate case in Arizona covers every form and document in depth.

How do you fill out the Petition for Probate form?

The Petition for Probate is the core document that starts the entire process. Arizona uses standardized court forms, which you can download from the Arizona Supreme Court's probate forms page. Accuracy matters here errors or incomplete information will delay your filing.

Key sections you'll need to complete:

Decedent information full legal name, date of death, county of residence at time of death, and whether the person died with or without a will (intestate vs. testate)
Petitioner information your full name, address, and your relationship to the decedent
Type of administration check whether you're requesting informal probate, formal probate, or supervised administration
Personal representative nomination list who you're requesting to be appointed and whether they're named in the will or nominated by law
Interested parties names, addresses, and relationships of all heirs, devisees, and anyone with a legal interest in the estate
Estate description a general overview of the estate's assets (real property, bank accounts, vehicles, personal property)
Will details if there's a will, state when and where it was executed, and confirm you're attaching the original

Write legibly if you're completing the form by hand, or better yet, type the information directly into the PDF form before printing. Every section must be completed if a section doesn't apply, write "N/A" rather than leaving it blank.

Once you've filled out the petition, sign it in front of a notary public. The court will reject unsigned or unnotarized petitions.

Where and how do you file the petition?

You'll file your petition with the Maricopa County Superior Court, Probate and Mental Health Division. You have two options:

In person Bring your completed, notarized petition and all supporting documents to the courthouse. Filing clerks can verify your paperwork on the spot, which reduces the chance of rejection.
By mail Send your documents to the court's probate filing office. Include a self-addressed, stamped envelope if you want a filed-stamped copy returned to you.

As of recent court guidelines, Maricopa County also accepts electronic filing (e-filing) for probate cases through the court's e-filing portal. This can speed up the process, but you'll need to register for an account first.

Filing fees

The filing fee for a probate petition in Maricopa County typically runs around $280–$300, but fees change, so check the court's current fee schedule before you go. If you can't afford the fee, you can file a Deferral or Waiver of Fees application with the court.

For a broader overview of how to file probate documents as an executor, see our step-by-step instructions on filing probate documents in Arizona.

What happens after you file the petition?

Filing the petition isn't the finish line it's the starting point. Here's what typically follows:

For informal probate:

Court review A probate registrar reviews your petition. If everything is in order, they issue a Statement of Appointment and Letters Testamentary (or Letters of Administration if there's no will).
Notification to interested parties You must formally notify all heirs, devisees, and interested persons about the probate proceeding. Arizona law requires this within 30 days of your appointment.
Creditor notice You're required to publish a notice to creditors in a Maricopa County newspaper. Creditors then have a set period (usually four months after the first publication date) to file claims against the estate.
Inventory and appraisal Within 90 days of your appointment, you must file an inventory of the estate's assets with the court.

For formal probate:

The court schedules a hearing. You'll need to attend and present your petition to a judge. If there are no objections, the judge issues an order appointing you as personal representative.

Keeping track of these steps and deadlines is critical. Our article on personal representative filing timelines and deadlines in Arizona breaks down every due date you need to know.

What mistakes trip people up most often?

Probate filings in Maricopa County get rejected or delayed for the same handful of reasons over and over again. Here are the ones that cause the most headaches:

Filing copies instead of the original will The court requires the original document. If you can't find the original, you'll need to address that with the court before proceeding.
Incomplete forms Leaving fields blank, even ones that seem unimportant, will get your petition sent back.
Not notarizing the petition Your signature must be notarized. Period.
Missing interested parties If you fail to list all heirs or beneficiaries, someone can challenge the probate later, and the court may remove you as personal representative.
Missing deadlines Arizona law sets strict timelines for notifications, inventory filings, and creditor notices. Missing even one deadline can create legal problems.
Filing in the wrong county Probate must be filed in the county where the decedent lived at the time of death. If they lived in Maricopa County, you file here. If they lived in Pima County, you file there.

For a more detailed look at what goes wrong, read our breakdown of common mistakes executors make when filing probate documents in Arizona.

What practical tips make the process smoother?

Order extra certified copies of the death certificate You'll need them for banks, insurance companies, and government agencies. Most people need at least 10.
Keep copies of everything you file Make a complete copy of your petition and every document before you submit it to the court.
Call the court clerk before you go Confirm office hours, current filing fees, and whether you need to schedule an appointment. Maricopa County court hours and procedures occasionally change.
Start a deadline tracker Use a calendar or spreadsheet to track every filing deadline, notification requirement, and court date. This one habit prevents more problems than anything else.
Talk to a probate attorney if things get complicated If there are disputes among heirs, unclear will language, significant debts, or out-of-state property, professional guidance can save you time and money.

Your probate filing checklist for Maricopa County

Use this checklist to track your progress before and after filing:

Obtain the original will (or confirm there is no will)
Get certified copies of the death certificate
Download and complete the Petition for Probate form
Gather names, addresses, and relationships of all heirs and devisees
Have your petition notarized
Pay the filing fee (or file a fee waiver)
File the petition with Maricopa County Superior Court, Probate Division
Receive your Letters Testamentary or Letters of Administration
Send formal notice to all interested parties within 30 days
Publish notice to creditors in a local newspaper
File an inventory of estate assets within 90 days
Track all deadlines and keep copies of every document

Start with step one today. Getting organized before you walk into the courthouse makes the entire process faster and far less stressful. If you want a full picture of all the documents involved, our guide to required paperwork for opening a probate case in Arizona covers every form you'll need from start to finish.