About Cause of Death Affidavit
Cause of Death Affidavit (MPC 475) is a probate form used during estate settlement in Massachusetts.
Where to get the official form
The official version of Cause of Death Affidavit is published as a PDF by the Massachusetts 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 Cause of Death Affidavit (PDF) →
Source: mass.gov
Link last checked: August 28, 2026
Prefer to fill it in online? The Massachusetts courts also publish Cause of Death Affidavit as a guided online form that walks you through each field and then saves a completed PDF you can file.
Fill MPC 475 online at the Massachusetts courts →How to file Cause of Death Affidavit in Massachusetts
- Step 1 — Confirm you have the correct formDouble-check that Cause of Death Affidavit (MPC 475) is 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 Cause of Death Affidavit 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 Cause of Death Affidavit 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).