Michael J. Berger and Co. Data Breach Letter: What Happened and Your Legal Options

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Active investigation Data breach · Financial Services Notices mailed Oct 20, 2026

Got a data breach letter from Michael J. Berger and Co.?

Dapeer Law, P.A. is investigating a potential class action against Michael J. Berger and Co., a New York accounting firm, on behalf of individuals whose personal information may have been involved in a September 2025 data event that the firm reported to state Attorneys General in October 2026.

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Massachusetts residents affected
8
Reported to the Massachusetts Attorney General; Massachusetts only
Breach window
Sep 17, 2025
Network accessed by an unauthorized actor
Notification delay
13 months
Discovered Sep 2025, NH notices mailed Oct 2026
Credit monitoring
12 or 24 months
Through Haystack, 12 months in NH letter, 24 in MA letter
Updates

Latest on the Michael J. Berger and Co. data breach

  • : Dapeer Law opened its investigation following notice filings posted by the Massachusetts, New Hampshire and Vermont Attorneys General.
Eligibility

Who qualifies for the Michael J. Berger and Co. data breach investigation

You may be eligible to participate in a class action if any of the following applies:

  • You received a data breach notification letter from Michael J. Berger and Co..
  • Your letter offered enrollment in complimentary Haystack credit monitoring and identity protection services. The New Hampshire sample letter offers 12 months, and the Massachusetts sample letter offers 24 months.
  • You had personal information held by Michael J. Berger and Co.. The New Hampshire filing describes the firm as an accounting firm located in New York.
  • No proof of harm required to consult with counsel. You do not need to have already suffered identity theft to explore your legal options.
  • Excluded: individuals who did not receive a breach notice and whose information was not involved in the incident.

Not sure if you qualify?

Send us your notice, we'll confirm your eligibility at no cost.

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Background

What happened in the Michael J. Berger and Co. data breach

According to the notice filed with the New Hampshire Attorney General, Michael J. Berger and Co., an accounting firm located in New York, received alerts on September 19, 2025 of a disruption to its computer network as a result of a ransomware event. The firm's investigation concluded that its network was accessed by an unauthorized actor on September 17, 2025. The firm engaged a third-party vendor to review the dataset involved, and the vendor provided its results on May 13, 2026. After a supplemental review, the firm confirmed on July 21, 2026 that certain files in the data set taken from its network contained personal information.

The New Hampshire filing says the firm notified New Hampshire residents by First Class U.S. mail on October 20, 2026, more than 13 months after the disruption was detected. That filing states that the data varied by individual, but may have included names, Social Security numbers and financial account information. The Massachusetts filing lists financial account information and Social Security numbers. The Vermont Attorney General's table lists Social Security Numbers, Financial Account Codes and Credit and Debit Account Info. The posted sample letters leave the list of information involved blank, so your own letter should show what was involved for you.

The firm is offering complimentary credit monitoring and identity protection services through Haystack. The New Hampshire sample letter and filing offer 12 months, and the Massachusetts sample letter offers 24 months. The New Hampshire filing says the offer is for individuals whose Social Security numbers are involved. State filings report 4 New Hampshire residents, 8 Massachusetts residents and 5 Vermonters, and the sample letter states that 1 Rhode Island resident's data was impacted. Whether the firm's security practices met legal standards, and whether the time taken to notify individuals caused additional harm, are among the issues being evaluated.

Top of the sample Michael J. Berger and Co., CPA LLP data breach notice letter filed with the New Hampshire Attorney General
Sample notice letter filed with the New Hampshire Attorney General. Your letter may look slightly different.
Financial Services Ransomware event Social Security numbers Delayed notice New Hampshire AG filing Massachusetts AG filing
Action plan

What to do if you got a Michael J. Berger and Co. data breach letter

1

Keep your notice letter

Do not discard it. Your letter is where the activation code for the Haystack credit monitoring is printed, and it is important evidence if you decide to participate in a lawsuit.

2

Enroll in the free Haystack credit monitoring

The sample letters direct enrollment at www.equifax.com/activate within ninety (90) days from the date of the letter. The New Hampshire filing says the offer is for individuals whose Social Security numbers are involved. Accepting this benefit does not waive your right to pursue legal action.

3

Place a fraud alert or credit freeze

Contact Equifax, Experian, and TransUnion to place a fraud alert or freeze on your file. Request a free weekly credit report from AnnualCreditReport.com, and use the FTC's IdentityTheft.gov recovery guide.

4

Speak with a data breach attorney

Consultations with Dapeer Law are free and confidential. We'll review your notice, explain your options, and advise whether you may be eligible to join a class action.

Submit your notice for a free review

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Timeline

Michael J. Berger and Co. breach timeline

Sep 17, 2025 Passed
Network accessed by an unauthorized actor
Sep 19, 2025 Passed
Alerts of a network disruption received, described in the NH filing as a ransomware event
May 13, 2026 Passed
Third-party vendor provided results of its review of the dataset
Jul 21, 2026 Passed
Firm confirmed files taken from its network contained personal information
Sep 24, 2026 Passed
Contact information validated after a National Change of Address review (sample letter)
Sep 28, 2026 Passed
Four New Hampshire residents identified after address review (NH filing)
Oct 20, 2026 Passed
Notices mailed to New Hampshire residents by First Class U.S. mail
Oct 21, 2026 Passed
Reported to the New Hampshire, Massachusetts and Vermont Attorneys General
Pending Active
Potential class action filing
Statutes of limitations vary by state and legal theory, typically one to six years. Waiting can permanently bar your claim.
Possible recovery

Compensation you may be entitled to

Out-of-pocket expenses

Credit freezes, identity restoration services, and other costs incurred responding to the breach.

Time spent monitoring

Hours spent reviewing accounts, disputing fraudulent charges, and dealing with identity theft issues.

Identity theft & fraud losses

Unreimbursed funds stolen from accounts, unauthorized credit lines, or tax refund fraud tied to the breach.

Statutory damages

Certain state data breach and consumer protection statutes provide for fixed damages regardless of actual loss.

Injunctive relief

Court orders requiring the accounting firm to implement stronger data security practices going forward.

Compensation categories depend on applicable state law, the types of data exposed, and documented losses. No recovery is guaranteed.

FAQ

Michael J. Berger and Co. data breach FAQ

I received a data breach letter from Michael J. Berger and Co. What should I do? +

Keep the letter. Enroll in the free Haystack credit monitoring within 90 days from the date of your letter, using the activation code it contains. Review your account statements and credit reports, consider a fraud alert or credit freeze, and contact a data breach attorney for a free consultation. Accepting credit monitoring does not waive your right to pursue a claim.

Is the Michael J. Berger and Co. data breach letter real or a scam? +

Michael J. Berger and Co. has reported this incident to the Massachusetts, New Hampshire and Vermont Attorneys General. Compare your letter to the official filing linked in Sources below, and use only the enrollment website and phone number printed in your letter. Be cautious of unexpected calls, texts or emails about the breach that ask for your Social Security number or account login. If you are unsure, send your letter to Dapeer Law for a free review.

Am I eligible to join a class action against Michael J. Berger and Co.? +

If you received a breach notice from Michael J. Berger and Co. about this incident, you are likely eligible for a free case evaluation. Eligibility depends on your state of residence, the categories of your data that were involved, and any losses you have suffered. Dapeer Law will review your notice at no cost.

How much money could I receive from a class action lawsuit? +

Data breach class action recoveries vary significantly. Settlements typically range from a few hundred dollars for basic out-of-pocket losses to several thousand dollars for documented identity theft, with class size, damages, and negotiation all affecting the final amount. No payout is guaranteed, and this investigation has not yet resulted in a settlement.

What personal information was exposed in the breach? +

The New Hampshire filing states that the data varied by individual, but may have included names, Social Security numbers and financial account information. The Massachusetts filing lists financial account information and Social Security numbers. The Vermont Attorney General's table lists Social Security Numbers, Financial Account Codes and Credit and Debit Account Info. The posted sample letters leave the list of information blank, so check your own letter for the categories involved for you.

Did Michael J. Berger and Co. offer free credit monitoring? +

Yes. The firm is offering complimentary credit monitoring and identity protection services through Haystack. The New Hampshire sample letter and filing describe 12 months of single bureau credit monitoring, fraud consultation and identity theft restoration services for individuals whose Social Security numbers are involved. The Massachusetts sample letter describes 24 months of alerts. The sample letters say you must enroll within ninety (90) days from the date of the letter. Enrollment does not waive your right to pursue a claim.

How many people were affected by the Michael J. Berger and Co. breach? +

The firm has not disclosed a total number of affected individuals. State filings report 4 New Hampshire residents, 8 Massachusetts residents and 5 Vermonters, and the sample letter states that 1 Rhode Island resident's data was impacted. These are partial, state-level counts. This page will be updated as more information becomes available.

Is there a deadline to take legal action? +

Yes. Statutes of limitations for data breach claims vary by state and legal theory, typically ranging from one to six years. Waiting can permanently bar your claim. Contact us as soon as possible for a free evaluation.

How do I get a copy of the official breach notice? +

The notice filed with the New Hampshire Attorney General is linked in Sources below, and it includes a sample copy of the individual letter. A sample letter was also filed with the Massachusetts Attorney General. The Vermont Attorney General lists the report in its Security Breach Notices table. If you received a letter but no longer have it, Dapeer Law can assist you in obtaining a copy during your free consultation.

References

Sources & references

Attorney advertising. This page is provided for informational purposes only. It does not constitute legal advice or form an attorney-client relationship. Dapeer Law, P.A. is not affiliated with Michael J. Berger and Co., CPA LLP, Haystack, or any credit bureau. Prior results do not guarantee a similar outcome. Information regarding the data incident is drawn from official filings with the Massachusetts, New Hampshire and Vermont Attorneys General.
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Rachel Dapeer, Esq.

Rachel Dapeer is the founding partner of Dapeer Law, P.A., a consumer class action firm with offices in Florida, California, New York, New Jersey, and Illinois. With about 15 years of class action experience, she represents consumers in data breach, privacy, and consumer protection cases. She is admitted to practice in Florida, New York, New Jersey, and Illinois. Hear her hot takes on tiktok: @thatattorneyrachel

https://www.dapeer.com/rachel-dapeer
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