About Petition for Informal Probate of Will Appointment of Personal Representative
To petition a Massachusetts Probate and Family Court for informal probate of a will and appointment of a personal representative to administer an estate.
When you'd use it: When a decedent has died with a valid will and the petitioner (an interested person) seeks informal probate and appointment of a personal representative within three years of death.
Where to get the official form
Petition for Informal Probate of Will Appointment of Personal Representative is published through the Massachusettscourts' official forms page. Open it to find and download the current version directly from the court rather than a third-party copy:
Official court source
Open the official Massachusetts forms page →
Source: courtforms.jud.state.ma.us
Link last checked: June 27, 2026
How to file Petition for Informal Probate of Will Appointment of Personal Representative in Massachusetts
- Step 1 — Confirm you have the correct formUse Petition for Informal Probate of Will Appointment of Personal Representative (MPC 150) when when a decedent has died with a valid will and the petitioner (an interested person) seeks informal probate and appointment of a personal representative within three years of death. Double-check it's the right form for your situation — Massachusetts 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 Petition for Informal Probate of Will Appointment of Personal Representative 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 Petition for Informal Probate of Will Appointment of Personal Representative to the probate court or county clerk handling the estate — usually in the Massachusetts county where the deceased lived. Ask the clerk how they prefer to receive filings (in person, by mail, or e-filing).