Understanding your Commonwealth of Massachusetts Department of Revenue State data breach notification letter
If a Commonwealth of Massachusetts Department of Revenue State letter arrived in your mailbox, here is what it means, why you received it, and the free steps you can take right now.
Why you received this letter
The Commonwealth of Massachusetts Department of Revenue State has reported a security incident affecting personal information. An investigation is underway into the breach, which was filed on July 16, 2026, and could impact individuals whose data is managed by the agency.
What to do after the letter
Confirm the notice is genuine
A legitimate Commonwealth of Massachusetts Department of Revenue State notice references the specific incident reported to the Massachusetts Attorney General and describes which categories of your information were involved. Compare the letter against the public filing before acting on any links or phone numbers it contains.
Keep the letter — it is your proof of connection
The notification letter is the document that ties your personal information to this incident. Keep the original and photograph it. If you later request a case review, this letter is the strongest evidence that you were among the affected individuals.
Protect your accounts and credit
Depending on what was exposed, consider a free credit freeze with all three bureaus, new passwords for reused credentials, and monitoring of financial statements. These steps are free and do not require you to wait for anyone's permission.
Check the record against the public filing
You can verify the Commonwealth of Massachusetts Department of Revenue State incident against the filing reported to the Massachusetts Attorney General. This registry summarizes what was filed; it does not provide legal advice.
This page summarizes a data breach reported to the Massachusetts Attorney General for informational purposes. DataBreachInformation.com is a neutral reference registry and does not provide legal advice.