Hallisey & D’Agostino Data Breach Investigation
Hallisey & D’Agostino, LLP has reported a data security incident to the Maine Attorney General. According to the filing, the event was tied to an external system breach and written notices were sent on April 17, 2026. This page explains what is publicly known, what information may have been involved, and practical steps affected people can take now. If you received a notice and want to see whether you may qualify for a claim, you can fill out the form on this page to contact Strauss Borrelli PLLC.
Hallisey & D’Agostino, LLP is a public accountant firm based in Wethersfield, Connecticut. Based on the public filing, the company provides accounting-related services and later reported a cybersecurity incident to regulators. For readers who received a notice, the key issue is understanding what was reported, what information may have been involved, and what steps to take next.
Key Facts at a Glance
- Entity: Hallisey & D’Agostino, LLP, located in Wethersfield, Connecticut.
- Incident type: According to a Maine Attorney General filing, the event was reported as an external system breach (hacking).
- Reported incident date: September 28, 2025.
- Reported discovery date: March 19, 2026.
- Consumer notice date: Written notices were reportedly sent on April 17, 2026.
- Reported number affected: 16,683 people in total, including 74 Maine residents.
- Information involved: The public listing indicates “name or other personal identifier in combination with,” but it does not clearly display every specific data element on the page available to the public.
- Protection services: The filing says 12 months of IDX credit monitoring, identity restoration services, and identity theft insurance were offered.
- Filing contact: The Maine filing lists legal counsel contact information, including (718) 614-9371.
What Happened?
According to the Maine Attorney General filing, Hallisey & D’Agostino, LLP reported an external system breach involving its network environment. The filing identifies September 28, 2025 as the date the incident occurred and March 19, 2026 as the date it was discovered. It also indicates that written notice to affected individuals was sent on April 17, 2026, which is also the public listing date on the Maine portal.
The publicly available filing provides a useful overview, but it does not include every detail that affected individuals may want to know. If you received a letter, your individual notice may contain more specific information about what happened, what data may have been involved, and what protective services were offered to you.
What Information Was Exposed?
Based on the public regulator listing, the information acquired field states “name or other personal identifier in combination with,” which suggests that personal information may have been involved. However, the version of the public page reviewed here does not clearly display the full list of paired data elements. Because of that limitation, it would not be accurate to assume a longer list of exposed information than the filing plainly shows.
If you received a notice letter, review it closely for the exact categories identified in your case. Those details matter because the steps you should prioritize can differ depending on whether the incident involved basic identifying information, financial information, tax-related records, or other sensitive data. Even when public filings are incomplete, a notice of this kind should be taken seriously.
What Should You Do Next?
- Read your notice carefully. Look for the date of the letter, any stated deadline to enroll in free protection services, and any description of the information that may have been involved.
- Enroll in the free IDX services if offered to you. The filing says affected individuals were offered 12 months of credit monitoring, identity restoration services, and identity theft insurance.
- Monitor your accounts and credit reports. Watch bank, credit card, loan, and other financial activity for transactions or changes you do not recognize. You can also request your free credit reports and consider whether a fraud alert or credit freeze makes sense for you.
- Be alert for phishing attempts. After a reported security incident, scammers may use calls, emails, or texts that appear related to the company or the notice. Do not click links or share sensitive information unless you have confirmed the source independently.
- Keep records and ask questions early. Save the letter, screenshots, enrollment confirmations, and any expenses or time you spend responding. If you want to understand your options, you can fill out the form on this page to contact Strauss Borrelli PLLC.
Your Legal Rights
If your personal information was involved in a reported security incident, you may have legal rights depending on the facts and the laws that apply. In some situations, consumers may seek relief if inadequate safeguards, delayed notice, or the exposure of sensitive information caused measurable harm or created a meaningful risk of identity theft or fraud.
Your potential rights will depend on issues such as what information was involved, what the notice says, whether misuse has occurred, and what losses or time burdens you have experienced. Keeping documentation is important. That can include the notice letter, credit monitoring enrollment records, communications with banks or credit bureaus, and any evidence of fraudulent activity or out-of-pocket costs.
Why Hire Strauss Borrelli PLLC?
Strauss Borrelli PLLC represents consumers in data breach and privacy incident matters and has experience investigating reported cybersecurity events, notice practices, and the impact on affected individuals. Our team works to explain the process in plain language, evaluate whether a claim may exist, and pursue accountability when the facts support it.
If you received a notice related to the reported Hallisey & D’Agostino incident, Strauss Borrelli PLLC can review the publicly available information with you and help you understand the next steps. You can contact the firm using the form provided on this page.
Find out if you qualify for compensation
We would like to speak with you about your rights and potential legal remedies in response to this data breach. Please fill out the form, below, or contact us at 872.263.1100 or sam@straussborrelli.com.
Frequently Asked Questions
Did Hallisey & D’Agostino, LLP report a data incident?
Yes. According to a filing on the Maine Attorney General’s data breach portal, Hallisey & D’Agostino, LLP reported an external system breach, described as hacking, tied to September 28, 2025.
When did Hallisey & D’Agostino discover the reported incident?
The Maine filing says the incident was discovered on March 19, 2026. The same filing says written notices to affected individuals were sent on April 17, 2026.
What information may have been involved in the Hallisey & D’Agostino incident?
The public filing states “name or other personal identifier in combination with,” but the publicly accessible page does not clearly display the full list of specific data elements. Your individual notice letter may provide more detail.
How many people were affected by the reported Hallisey & D’Agostino incident?
The Maine Attorney General filing reports that 16,683 people were affected in total, including 74 Maine residents.
Was credit monitoring offered after the reported Hallisey & D’Agostino incident?
Yes. The Maine filing says 12 months of IDX services were offered, including credit monitoring, identity restoration services, and identity theft insurance.
