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The MJMS Family Office Services LLC and Madden, Jiganti, Moore & Sheridan LLP data breach: your legal rights

MJMS Family Office Services LLC and Madden, Jiganti, Moore & Sheridan LLP told the Massachusetts Attorney General that people’s personal information was exposed. If you got a notice, these are the rights you have.

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Your rights after this breach

  • To be told about the breach

    Massachusetts law requires a company that loses residents' personal information to notify them. MJMS Family Office Services LLC and Madden, Jiganti, Moore & Sheridan LLP reported this breach to the Massachusetts Attorney General.

    Massachusetts data breach notification law

  • To ask whether you can recover money

    If MJMS Family Office Services LLC and Madden, Jiganti, Moore & Sheridan LLP did not take reasonable care of your information, you may have a claim for negligence or under Massachusetts law. An attorney can review it with you for free.

    Massachusetts common law and consumer protection statutes

Rights every American has after a breach

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What MJMS Family Office Services LLC and Madden, Jiganti, Moore & Sheridan LLP reported

Reported to
Massachusetts Attorney General
Date filed
July 14, 2026
People notified
Not stated
Cause in filing
Not stated

MJMS Family Office Services LLC and Madden, Jiganti, Moore & Sheridan LLP operate at the intersection of boutique legal counsel, wealth management, and private client fiduciary services. These entities handle ultra-high-net-worth individuals, family offices, trusts, and closely held businesses, requiring them to centralize an extraordinary volume of confidential personal and financial dossiers. Because of the nature of their practice, they routinely collect, process, and store highly sensitive information, including comprehensive estate planning documents, tax returns, corporate governance records, wire instruction histories, and private identification numbers. This creates an inviting repository for cybercriminals seeking to exploit high-value targets. In 2026, the organizations reported a significant data security incident to the Massachusetts Attorney General, signaling a breach of the digital safeguards protecting their network infrastructure. While the precise mechanics of the intrusion continue to be evaluated, incidents affecting specialized legal and financial practices frequently involve sophisticated threat actors executing targeted credential harvesting, unauthorized network penetration, or ransomware deployments. These attacks often exploit vulnerabilities in legacy client portals, third-party vendor integrations, or inadequately secured cloud storage environments where dense legal and financial documents reside. The exposure resulting from this incident encompasses a dangerous aggregation of personally identifiable information and financial data. Victims face the compromise of core identifiers such as full names, dates of birth, and Social Security numbers, alongside deeply sensitive financial account numbers, trust agreements, and tax documentation. In the context of family office and legal services, the exposure of tax return information and banking details provides bad actors with the precise instruments needed to execute sophisticated tax fraud, synthetic identity creation, and unauthorized wire transfers or financial account takeovers. Under state and federal data protection standards, including Massachusetts general laws governing consumer privacy and data security, entities entrusted with sensitive private client data have a stringent legal duty to implement and maintain robust administrative, physical, and technical safeguards. Law firms and family offices are bound by strict ethical and statutory obligations to protect client confidences. A breach of this magnitude strongly suggests potential failures in encryption protocols, multi-factor authentication enforcement, or timely vulnerability patching, representing a departure from the reasonable security standards required to repel modern cyber threats. Receiving a data breach notification letter from MJMS Family Office Services LLC and Madden, Jiganti, Moore & Sheridan LLP serves as formal acknowledgment that your private information was compromised due to inadequate security measures. Legally, this notification establishes the necessary standing to participate in a class action lawsuit aimed at holding the entities accountable for failing to safeguard your data. Under the law, you do not need to prove that you have already suffered actual financial loss or identity theft to seek legal redress. Our firm handles these complex privacy cases on a contingency fee basis, meaning you pay absolutely nothing out of pocket, and there are no fees unless we successfully recover compensation on your behalf.

MJMS Family Office Services LLC and Madden, Jiganti, Moore & Sheridan LLP data breach questions

Is the MJMS Family Office Services LLC and Madden, Jiganti, Moore & Sheridan LLP data breach letter legit or a scam?
A notice from MJMS Family Office Services LLC and Madden, Jiganti, Moore & Sheridan LLP in the mail matches the breach MJMS Family Office Services LLC and Madden, Jiganti, Moore & Sheridan LLP reported to the Massachusetts Attorney General on July 14, 2026. Check that the company name and dates in your letter match that filing. A real notice of data security incident won't ask for your password, Social Security number or a payment — if it does, contact MJMS Family Office Services LLC and Madden, Jiganti, Moore & Sheridan LLP through a phone number or website you find yourself.
Did MJMS Family Office Services LLC and Madden, Jiganti, Moore & Sheridan LLP offer free credit monitoring?
Look for an enrollment code in your MJMS Family Office Services LLC and Madden, Jiganti, Moore & Sheridan LLP notice. Companies that offer free credit monitoring after a breach usually include it there, with a deadline to activate. Enrolling does not give up your right to bring a claim.
Is there a MJMS Family Office Services LLC and Madden, Jiganti, Moore & Sheridan LLP data breach class action lawsuit?
Law firms often open an investigation after a breach notice like this one, and a class action lawsuit may follow. This page doesn't confirm that a lawsuit has been filed against MJMS Family Office Services LLC and Madden, Jiganti, Moore & Sheridan LLP. You usually don't have to join a class action to be included — if a settlement is reached, class members are notified and can file a claim.
What should I do after getting the MJMS Family Office Services LLC and Madden, Jiganti, Moore & Sheridan LLP data breach notice?
Keep the letter and the envelope, and note the date it arrived. Freeze your credit with Equifax, Experian and TransUnion, change any passwords the notice mentions, and sign up for any free credit monitoring the letter offers. Then check whether you may have a claim.
Do I need a MJMS Family Office Services LLC and Madden, Jiganti, Moore & Sheridan LLP data breach lawyer or attorney?
An attorney can read your notice and tell you whether a claim makes sense. A case review here is free, and data breach cases are usually handled on contingency, so there is no upfront cost.
Can I sue MJMS Family Office Services LLC and Madden, Jiganti, Moore & Sheridan LLP over the data breach?
It depends on what was exposed, the law in Massachusetts and your own state, and whether you've been harmed. Most people take part through a class action rather than suing alone. Keep your notification letter — it's the proof that connects you to the breach.
How much could a MJMS Family Office Services LLC and Madden, Jiganti, Moore & Sheridan LLP data breach settlement or claim be worth?
There is no set amount, and no MJMS Family Office Services LLC and Madden, Jiganti, Moore & Sheridan LLP settlement is confirmed here. In past data breach settlements, payments depended on what data was exposed and on documented losses — fraud, out-of-pocket costs and time spent dealing with the breach. Keep receipts and records; they're what damages claims are built on.

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