NH · AG Filing: Apr 17, 2026
No cost. No obligation. If your data was exposed by Hallisey & D’Agostino, LLP, you may be entitled to financial compensation.
Start Free Review →Based on the data types reported in this filing:
Your SSN is the master key to your identity. Once exposed, criminals can open new lines of credit, take out loans, or file taxes in your name.
Combined with a name and other leaked data, date of birth helps criminals pass identity verification questions at banks and government agencies.
Hallisey & D’Agostino, LLP was the subject of a data breach notification filed with the NH Attorney General. The AG filing was recorded on April 17, 2026.
From the AG filing description
Hallisey & D’Agostino, LLP operates as a prominent professional services firm, specializing in complex legal representation, corporate litigation, estate planning, and sensitive advisory services. Because of the nature of modern legal practice, firms of this caliber routinely amass vast repositories of highly confidential and sensitive information. This includes not only internal operational records and proprietary business strategies, but also intimate personal details belonging to clients, opposing parties, employees, and third-party stakeholders. The firm functions as a trusted custodian of confidential data, holding documents that span financial records, private communications, corporate governance files, and detailed personal identifiers required for litigation and transactional work. In 2026, Hallisey & D’Agostino, LLP formally reported a significant security incident to the New Hampshire Attorney General, alerting affected individuals and regulatory authorities to an unauthorized compromise of its network infrastructure. While investigations into legal sector data breaches typically point toward sophisticated cybercriminal syndicates utilizing targeted phishing, credential harvesting, or ransomware deployment against vulnerable IT perimeters, law firm breaches often expose structural weaknesses in how third-party vendors, legacy document management systems, and remote access portals are secured. In the legal industry, where immense volumes of high-value data are concentrated within a single enterprise, a network breach can grant unauthorized actors deep, persistent access to internal file shares and client databases before detection occurs. The exposure resulting from the Hallisey & D’Agostino, LLP breach threatens victims with severe, multi-faceted risks depending on the exact categories of compromised information. When legal databases are breached, the stolen data frequently encompasses full names, Social Security numbers, dates of birth, financial account details, tax documents, and deeply personal correspondence. The compromise of Social Security numbers and dates of birth exposes individuals to immediate risks of identity theft and fraudulent credit applications. Furthermore, because law firms routinely handle sensitive personal, financial, and corporate litigation files, the exposure of private records can lead to targeted spear-phishing, unauthorized financial account takeover, and severe breaches of personal privacy that are exceptionally difficult to remediate. As a professional services entity operating within New Hampshire and handling interstate client matters, Hallisey & D’Agostino, LLP was bound by strict common-law duties, state consumer protection statutes, and professional standards of care to secure the sensitive information entrusted to its care. Under the New Hampshire Data Breach Notification Act and applicable state privacy frameworks, businesses holding personal identifying information are required to implement and maintain reasonable cybersecurity controls, including robust encryption, multi-factor authentication, regular vulnerability assessments, and strict access controls. The occurrence of a successful network compromise and subsequent data exfiltration strongly suggests potential failures in upholding these foundational security obligations, raising serious questions about the adequacy of the firm's data protection measures prior to the incident. For individuals who have received a formal data breach notification letter from Hallisey & D’Agostino, LLP, this communication serves as legal confirmation that their private information was compromised due to corporate negligence. Legally, the receipt of this notice establishes the necessary standing to participate in class action litigation aimed at holding the firm accountable for failing to safeguard sensitive data. Importantly, victims do not need to wait until they experience actual financial fraud or out-of-pocket losses to pursue legal remedies; the increased, imminent risk of future identity theft is legally actionable. Our firm handles these data breach class action cases on a strict contingency fee basis, meaning affected individuals pay absolutely nothing out of pocket and legal fees are only recovered if a successful resolution or settlement is achieved.
You may have been affected by the Hallisey & D’Agostino, LLP data breach if:
Common categories of compensation in data breach class actions
The hours spent responding to a data breach — canceling accounts, contacting credit bureaus, updating passwords, and investigating fraud — represent compensable economic harm in data breach litigation.
Once your SSN is exposed, protection becomes an ongoing expense. Plaintiffs in data breach settlements have recovered costs for credit freezes, identity protection subscriptions, and time spent dealing with fraudulent accounts — sometimes covering multiple years of exposure.
Fees charged to close and reopen accounts, issue replacement cards, or dispute fraudulent transactions are recoverable in data breach litigation. So are the costs of overdrafts, late payments, and credit damage caused by unauthorized activity.
Data breach victims regularly report anxiety, loss of sleep, and ongoing fear of identity theft. These non-economic harms are cognizable injuries in data breach litigation, particularly in cases involving SSN or medical record exposure.
Note: an attorney general breach filing does not by itself establish a settlement fund, a payment amount, or a claim deadline. If an official settlement notice is later issued, rely on that notice for payment details and deadlines.
Applicable State Law
This breach was reported under the New Hampshire data breach notification law, which mandates notification and establishes your right to seek damages.
No. Under New Hampshire data breach notification law and federal law, the unauthorized exposure of your personal data — regardless of whether it has been actively misused — can be sufficient grounds for a claim. The breach itself is the injury.
Nothing. The Law Office of David S. Harris handles data breach cases on contingency — you pay zero upfront and owe nothing unless compensation is recovered.
Immediately place a free credit freeze at all three bureaus (Equifax, Experian, TransUnion). A freeze blocks new accounts from being opened in your name. Then file a complaint with the FTC at IdentityTheft.gov and contact our office — SSN exposure is one of the most serious breach types.
Banks may reverse fraudulent charges, but they are not obligated to compensate you for time lost, stress, or indirect damages. A class action claim against the breached company can recover those additional categories of harm.
State statutes of limitations for data breach claims typically run 2–4 years from the date of the breach or its discovery. Because this breach was recently disclosed, the window is open — but acting early preserves your options and strengthens the case.
Accepting free credit monitoring from Hallisey & D’Agostino, LLP does not waive your right to pursue legal action unless you signed a specific release waiving claims. In most cases, victims who accepted monitoring can still file.
Not necessarily. Many data breach victims are never notified directly. If your personal information was held by Hallisey & D’Agostino, LLP during the relevant period, you may still qualify even without receiving a letter. A free eligibility review can confirm your status.
Learn how to participate in the class action and what compensation you may be entitled to.
Join the Class Action →Use our verification tool to confirm your letter matches this official AG filing.
Verify My Notice LetterThis case file references a public filing made with the state filing in NH. This website is not affiliated with, endorsed by, or operated by any state government agency.
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