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Legacy Professionals Data Breach Investigation

Written by Joseph Lyon on . Posted in Data Breach.

The data breach lawyers at The Lyon Firm are reviewing a reported data security incident at Legacy Professionals LLP that may have resulted in sensitive personal information being viewed and acquired by unauthorized individuals. Contact an experienced privacy attorney following any data theft event to begin filing a claim and to minimize the risk of fraud and identity theft.

Our legal team has the experience, the dedication and the resources to take your case and seek rightful compensation on your behalf. Call now to file a class action complaint or to join an existing lawsuit.

What Happened at Legacy Professionals?

In a notice posted on the Legacy website, the accounting firm states that a recent data security event may have impacted personal information related to individuals doing business with the company. Anyone involved in accounting services, including individuals, corporations, not-for-profit organizations, labor unions or related employee benefit plans should confirm with the firm exactly what data may have been compromised.

Legacy says they currently have no evidence that any leaked information has been used to commit identity theft or fraud, though that is always a distinct possibility in these delicate situations.

  • In April 2024, Legacy Professionals first became aware of potentially suspicious activity on their IT network and started an initial investigation with cybersecurity specialists.
  • In November 2024, the investigation concluded that certain files had indeed been removed from Legacy servers by an unauthorized actor.
  • In early February 2025, Legacy confirmed that the following information on their systems may have included names, social security numbers, driver’s license/state ID numbers, and medical treatment / health insurance information.

On February 27, 2025, Legacy Professionals, LLP filed a notice of data breach with the Attorney General of Maine and also began sending out data breach notification letters to all individuals impacted. If you receive a data breach letter from any company, it is important to understand what is at risk and how you can proceed from here. A data breach attorney can assist you and your family, and can seek compensation for any related financial damages.

Legacy is an accounting firm operating out of Westchester, Illinois, and specializes in audit and tax services for employee benefit plans, labor organizations, nonprofits, and other larger entities. Their services include audits, reviews, tax and compliance services, payroll compliance audits, and outsourced accounting support.