About Affidavit of Heirship
This form establishes the identity and legal status of the heirs of a deceased person for probate proceedings.
When you'd use it: File this affidavit in probate court when you need to document and confirm who the lawful heirs of the decedent are, typically early in the estate administration process.
Where to get the official form
The official version of Affidavit of Heirship is published as a PDF by the Illinois courts. We checked this link and it resolved to a form on an official court or government website — always download the current version directly from the source rather than a third-party copy:
Verified official PDF
Download Affidavit of Heirship (PDF) →
Source: mchenrycircuitclerk.org
Link last checked: May 31, 2026
How to file Affidavit of Heirship in Illinois
- Step 1 — Confirm you have the correct formUse Affidavit of Heirship (PR-AFF1) when file this affidavit in probate court when you need to document and confirm who the lawful heirs of the decedent are, typically early in the estate administration process. Double-check it's the right form for your situation — Illinois probate forms are revised periodically, so verify the name and number against your court's current form list before you start.
- Step 2 — Complete every required fieldFill out Affidavit of Heirship carefully and review it for errors before filing. Probate cases can already take months — a small mistake on the form can set your timeline back further.
- Step 3 — Get it notarized or witnessed if requiredSome probate forms must be signed in front of a notary or witnesses. Check the instructions on the form itself, and arrange notarization before you file if it's required.
- Step 4 — File it with the correct courtSubmit Affidavit of Heirship to the probate court or county clerk handling the estate — usually in the Illinois county where the deceased lived. Ask the clerk how they prefer to receive filings (in person, by mail, or e-filing).