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MonitoringMaryland AG filing · March 17, 2025

Mark Thomas Data Breach Exposes Client Legal, Financial Data in Maryland

Mark Thomas, a Maryland legal and professional services firm, reported a data breach impacting highly sensitive client information. This incident potentially exposed Full Name, Social Security Number, and Financial Account Details, among other records, leaving individuals vulnerable to identity theft and fraud. If you received a notification, understanding these risks and your next steps is important.

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This breach is real, not a scam. Mark Thomas officially reported it to the Maryland Attorney General on March 17, 2025.

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State
Maryland
Reported
March 17, 2025

What may have been exposed

  • Full Name
  • Social Security Number
  • Date of Birth
  • Home Address
  • Financial Account Details
  • Tax Return Information
  • Legal Correspondence and Case Files
  • Direct Deposit Information

Mark Thomas, a prominent legal and professional services firm based in Maryland, recently reported a significant cybersecurity incident. On March 17, 2025, the firm notified authorities of an unauthorized intrusion into its systems, which handle extensive volumes of highly sensitive client and corporate information. This breach impacts individuals whose confidential details were entrusted to Mark Thomas for legal, financial, or advisory services.

The data exposed in the Mark Thomas breach includes a range of highly personal and sensitive information. Specifically, individuals may have had their Full Name, Social Security Number, Date of Birth, Home Address, Financial Account Details, Tax Return Information, Legal Correspondence and Case Files, and Direct Deposit Information compromised. Such a combination of exposed data poses a direct threat for identity theft, financial fraud, and other targeted attacks.

This exposure creates severe risks for affected individuals. With access to such detailed personal and financial records, cybercriminals can execute sophisticated identity theft, initiate fraudulent financial transactions, or exploit personal information for scams. The incident suggests that the security measures in place at Mark Thomas may have been insufficient to protect the sensitive data they were entrusted with, raising questions about the firm's compliance with data protection obligations.

If you have received a data breach notification letter from Mark Thomas, it serves as formal acknowledgment that your private information was compromised. This letter is an important record to understand your specific situation and the data categories involved. Reviewing your credit reports and monitoring financial accounts for suspicious activity are prudent first steps. For a more comprehensive understanding of your legal options and how this incident might affect you, consider a free, no-obligation case review.

What to do if you were affected

Based on the categories of information reported in this filing, these steps can help limit the risk of identity theft and fraud.

  • Freeze your credit

    Place a free credit freeze with Equifax, Experian, and TransUnion. A freeze blocks new accounts from being opened in your name and can be lifted anytime.

  • Guard against tax fraud

    File your tax return as early as possible and consider requesting an IRS Identity Protection PIN so no one can file a fraudulent return in your name.

  • Watch your financial accounts

    Review bank and card statements for unfamiliar activity and turn on transaction alerts. Report anything you don't recognize to your bank right away.

  • Stay alert to targeted scams

    Be cautious of calls, texts, or emails that reference this breach. Legitimate organizations won't ask you to confirm sensitive details through an unsolicited message.

  • Keep your notification letter

    Save the notice you received. It documents that your information was involved and is often needed to enroll in any credit monitoring offered or to join a related legal claim.

Mark Thomas data breach notice and letter questions

Is the Mark Thomas data breach letter legit or a scam?
A notice from Mark Thomas in the mail matches the breach Mark Thomas reported to the Maryland Attorney General on March 17, 2025. 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 Mark Thomas through a phone number or website you find yourself.
Where can I see the official Mark Thomas breach notice?
Mark Thomas's report is published by the Maryland Attorney General: https://oag.maryland.gov/resources-info/Pages/security-breach-notices.aspx#ITU-376560 Compare it with the letter you received to confirm the dates and details match.
How many people were affected by the Mark Thomas data breach, and what was exposed?
The filing does not give a count of affected people and lists the following information as involved: Full Name, Social Security Number, Date of Birth, Home Address, Financial Account Details, Tax Return Information, Legal Correspondence and Case Files, Direct Deposit Information. Your own letter is the best guide to what was exposed about you, since notices are usually tailored to each person.
Did Mark Thomas offer free credit monitoring?
Check your letter from Mark Thomas. If free credit or identity monitoring is offered, the enrollment code and deadline are printed in the notice itself. Because Social Security numbers are listed in this filing, identity monitoring and a credit freeze matter more than usual. Enrolling does not give up your right to bring a claim.
What should I do after getting the Mark Thomas 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.
Is there a Mark Thomas 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 Mark Thomas. 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.
Do I need a Mark Thomas data breach lawyer or attorney?
Talking to a data breach attorney costs nothing here. A lawyer can read your notice, explain your rights under your state's law and tell you whether a claim makes sense.
How much could a Mark Thomas data breach settlement or claim be worth?
There is no set amount, and no Mark Thomas 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. The filing lists Full Name, Social Security Number, Date of Birth as involved. Keep receipts and records; they're what damages claims are built on.
Can I sue Mark Thomas over the data breach?
It depends on what was exposed, the law in Maryland 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.

Source: Maryland Attorney General filing

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