Missouri Probate Estate Administration Forms Guide

When someone passes away in Missouri, their property, debts, and final affairs don't sort themselves out. The probate court steps in to oversee the process, and that starts with paperwork specific forms that must be completed correctly. Filling out Missouri probate court estate administration forms the wrong way can delay the entire case for weeks or months, cost the estate extra money in attorney fees, and leave heirs waiting longer than necessary for what they're owed. Whether you've been named as an executor or you're a family member trying to understand the process, knowing how to complete these forms accurately is the first real step toward settling a loved one's estate.

What Are Missouri Estate Administration Forms?

Estate administration forms are the legal documents filed with the Missouri probate court to open and manage the probate process after someone dies. These forms notify the court of the death, identify who will manage the estate, list what the deceased person owned, and account for debts and distributions. They're governed by Missouri Revised Statutes, Chapter 473, which sets the rules for probate in the state.

The set of forms you'll encounter typically includes the petition to open probate, a proposed order, a notice to creditors, an inventory of assets, and accounting documents. The specific forms needed depend on the type of probate supervised or independent administration and the size and complexity of the estate.

When Do You Need to Fill Out These Forms?

You need to fill out estate administration forms when a Missouri resident dies and leaves behind assets that require probate. This generally means the deceased owned property solely in their name with no beneficiary designation or joint ownership that would transfer it automatically. Common triggers include solely owned real estate, bank accounts without a payable-on-death designation, vehicles titled only in the decedent's name, and personal property of significant value.

Not every estate goes through full probate. If the estate is small enough, Missouri allows the use of a small estate affidavit, which has its own form and filing requirements for heirs. But for larger estates, the full set of estate administration forms is required.

Who Fills Out the Estate Administration Forms?

The person responsible for filling out and filing these forms is the personal representative sometimes called the executor. If the deceased left a will, the will usually names this person. If there's no will, the court appoints someone, typically a surviving spouse or adult child.

The personal representative is the one who signs the petition, swears to the accuracy of the inventory, and handles all filings. That said, many personal representatives work with a probate attorney who prepares the forms on their behalf. Missouri law doesn't require you to hire a lawyer, but the paperwork has enough legal detail that professional help is common and often worth the cost.

You can learn more about how the personal representative appointment form works and what it requires in our detailed breakdown.

What Forms Do You Need to File First?

The probate process starts with a few key filings. Here's what typically comes first:

Petition for Probate of Will and/or for Letters Testamentary or Administration This is the opening document. It tells the court who died, whether they had a will, who is asking to serve as personal representative, and some basic information about the estate and heirs.
Proposed Order A draft order for the judge to sign, granting authority to the personal representative.
Notice of Letters Granted Once the court appoints the personal representative, this notice is published in a local newspaper to alert creditors.
Affidavit of Heirs Identifies the deceased person's surviving family members and their relationship to the decedent.

How Do You Fill Out the Petition to Open Probate?

The petition is the most important form in the bunch. Here's a section-by-section look at what you'll need to provide:

Decedent Information

Fill in the full legal name of the person who died, their date of death, their last address, and the county where they lived. Use the name exactly as it appears on the death certificate. Misspellings or name variations can cause the court to reject the filing.

Will Information

Indicate whether the deceased had a valid will. If yes, attach the original will to the petition. You'll also state whether the will names you as executor. If there's no will, you'll check the box for intestate administration meaning the estate will be distributed according to Missouri's inheritance laws rather than the decedent's wishes.

Personal Representative Details

Provide your full name, address, and relationship to the deceased. You'll also need to confirm that you're eligible to serve meaning you're at least 18 years old, of sound mind, and haven't been convicted of a felony.

Heirs and Beneficiaries

List the names, addresses, and relationships of all known heirs. If there's a will, list the named beneficiaries too. Be thorough. Omitting an heir is one of the most common mistakes people make on the Missouri estate administration petition, and it can lead to legal complications later.

Estate Assets (Estimated)

You don't need exact figures at this stage, but the court wants a general idea of the estate's value. Include estimated values for real estate, bank accounts, vehicles, investments, and personal property. This estimate helps determine whether supervised or independent administration is appropriate.

Signature and Verification

Sign the petition in front of a notary public. The notary will verify your identity and stamp the document. Some Missouri courts also require a filing fee, which varies by county but usually falls between $75 and $150.

How Do You Fill Out the Estate Inventory?

After the court appoints you as personal representative, you have a legal duty to file an inventory of the decedent's assets. In Missouri, this is typically due within 30 days of your appointment. The inventory must list every asset the deceased owned at the time of death, along with its fair market value.

Assets to include in the inventory:

Real estate (list the property address and estimated market value)
Bank accounts (checking, savings, CDs include the bank name and balance)
Vehicles, boats, and recreational vehicles
Investment accounts (stocks, bonds, retirement accounts subject to probate)
Life insurance payable to the estate
Personal property of value (jewelry, art, collectibles, furniture)
Business interests
Money owed to the deceased (promissory notes, tax refunds)

For a complete walkthrough, see our guide on Missouri executor estate inventory form filing requirements.

What Are the Most Common Mistakes?

Probate forms look straightforward, but small errors cause real problems. Here are the mistakes that come up most often:

Using outdated forms. Missouri courts update their forms periodically. Download the current version from your county's probate court or the Missouri courts website.
Incomplete heir information. Leaving out an heir even one you think doesn't want to be involved can stall the case or lead to a legal challenge.
Wrong asset values. The inventory needs fair market value, not the original purchase price or insurance value. For real estate, consider getting an appraisal.
Filing in the wrong county. The petition must be filed in the county where the deceased lived at the time of death, not where they owned property.
Forgetting the notarization. The petition must be signed before a notary. An unsigned or unnotarized petition will be rejected.
Missing deadlines. Missouri law sets strict deadlines for filing the inventory and other documents. Missing them can result in court sanctions or removal as personal representative.

For a deeper look at these issues, read our article on common mistakes when completing the Missouri estate administration petition.

Do You Need an Attorney to Fill Out These Forms?

Missouri doesn't require you to hire a probate attorney, but it's often a good idea especially if the estate involves real estate, multiple beneficiaries, business assets, or debts that exceed the estate's value. An experienced attorney can prepare the forms, file them correctly, and represent you in court if disputes come up.

If the estate is simple a few bank accounts, no real estate, no conflicts among heirs you may be able to handle the forms yourself using resources from your local probate court clerk. Many courts provide self-help packets with instructions.

What Happens After You File the Forms?

Once you file the petition and the court issues letters testamentary or letters of administration, the real work begins. As personal representative, you'll need to:

Publish the notice to creditors in a local newspaper
Send direct notice to known creditors
File the estate inventory within 30 days
Manage estate assets and pay valid debts
File periodic accountings with the court (in supervised administration)
Distribute remaining assets to beneficiaries
File a final accounting and petition to close the estate

Quick Checklist Before You File

Download the current forms from your county probate court
Gather the death certificate (you'll need multiple certified copies)
Locate the original will, if one exists
Get a complete list of heirs with names, addresses, and relationships
Collect recent statements for all bank and investment accounts
Get fair market value estimates for real estate and major assets
Have your petition notarized before submitting it
Bring the filing fee (confirm the amount with your court clerk)
Make copies of everything one for your records, one for the court

Next step: Visit your county probate court clerk's office or website to get the latest forms and fee schedule. If you're unsure about any section of the forms, that's the right time to consult with a probate attorney not after the court sends the forms back for corrections.