M&T Bank Data Breach Lawsuit Investigation
Received a July 2026 breach notice from M&T Bank?
Dapeer Law, P.A. is investigating potential legal claims against M&T Bank, a regional banking institution, on behalf of the customer whose account information may have been exposed when a check image was briefly made viewable to another bank customer in the July 2026 processing incident.
Who may qualify
You may be eligible to participate in a class action if any of the following applies:
- You received a data breach notification letter from M&T Bank dated July 2026.
- You received a notification letter from M&T Bank stating that your account information was viewable to another customer.
- You held an account with M&T Bank whose check image, name, or account number was involved in the processing error.
- 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.
What happened
On July 17, 2026, M&T Bank notified the Massachusetts Attorney General of a processing error that caused a check image related to one customer's account to be viewable to another bank customer. According to the notice, the exposure was the result of an internal processing error and was addressed as soon as it was identified.
The notice states that the information viewable included the affected customer's name and the bank account number displayed on the check image. M&T Bank reports that it removed the image immediately upon discovery and corrected the transaction to prevent further exposure. The filing indicates that one individual was affected, and it does not describe any complimentary credit monitoring or identity-protection services.
Even a limited exposure of a name paired with a bank account number can carry a risk of unauthorized transactions or attempted fraud. Notice recipients are encouraged to review their statements and online banking activity closely, report anything unfamiliar to the bank, and consider placing a free security freeze on their credit reports.
What to do if you received a letter
Keep your notice letter
Do not discard it. Your letter documents that your account information was exposed and is important evidence if you decide to pursue a claim.
Place a free security freeze on your credit reports
M&T Bank's notice recommends placing a security freeze with all three major credit bureaus, Equifax, Experian, and TransUnion. Under federal law you cannot be charged to place, lift, or remove a freeze, and doing so does not waive your right to pursue legal action.
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. Because a bank account number was exposed, watch specifically for unfamiliar withdrawals, checks, or transfers, and report them to the bank promptly.
Speak with a data breach attorney
Consultations with Dapeer Law are free and confidential. We will review your notice, explain your options, and advise whether you may be eligible to pursue a claim. Because the bank reported that only one individual was affected, any claim may proceed on an individual basis rather than as a class action.
Submit your notice for a free review
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Breach timeline
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 M&T Bank to implement stronger data handling and image-processing safeguards so that customer account information is not exposed to other customers in the future.
Compensation categories depend on applicable state law, the types of data exposed, and documented losses. No recovery is guaranteed.
Common questions
I received a data breach letter from M&T Bank. What should I do? +
Keep your notification letter, review your bank statements and online banking activity for unauthorized transactions, and immediately report anything unfamiliar to M&T Bank and, if appropriate, your local law enforcement agency. You may also place a free security freeze on your credit reports with Equifax, Experian, and TransUnion, and retain copies of any police reports related to identity theft.
Am I eligible to join a class action against M&T Bank? +
If you received a notice from M&T Bank stating that your account information was viewable to another customer, you may have grounds for a claim. Eligibility can depend on your state of residence and whether you experienced any documented losses. A free consultation can help clarify your options.
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? +
According to the notice, a customer's name and the bank account number displayed on a check image were viewable to another M&T Bank customer. The bank states that no other personal or account information was involved. You should check your individual letter for the specifics of your situation.
Did M&T Bank offer free credit monitoring? +
The notice does not describe any complimentary credit monitoring or identity-theft protection service. It does recommend placing a free security freeze with Equifax, Experian, and TransUnion. Under federal law there is no charge to place, lift, or remove a freeze, and doing so does not waive any legal rights.
How many people were affected by the M&T Bank breach? +
M&T Bank's filing indicates that one individual was affected. This page will be updated if additional 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 was filed with the Massachusetts Attorney General and can be downloaded from the Commonwealth's website. Dapeer Law can also help you obtain a copy during a free consultation.
Sources & references
- Official breach notice filing · Massachusetts Attorney General, Data Breach Notification (PDF)
- Company · M&T Bank (mtb.com)
- Credit bureau freezes · Equifax · Experian · TransUnion
- Free weekly credit reports · AnnualCreditReport.com
- Identity theft recovery guide · FTC IdentityTheft.gov
Don't let the deadline decide for you. Submit your claim today.
You only have a limited window to act. Our team will review your notice, explain your options, and tell you whether you may be eligible to recover compensation, at no cost to you.
