Data Breach Law Group Investigates the Mather & Co CPAs LLC Data Breach
By Data Breach Law Group | Posted on June 29, 2026 · Indiana
Miami, FL — Data Breach Law Group is investigating a data breach involving Mather & Co CPAs LLC, reported to the Indiana Attorney General on June 29, 2026. The firm is reviewing whether affected individuals have legal claims arising from the incident.
Mather & Co CPAs LLC is a professional accounting and tax services firm that manages sensitive financial and personal records for its clients. In the course of providing tax preparation, auditing, and financial consulting services, the firm typically collects and stores highly sensitive information including tax returns, Social Security numbers, and detailed financial account records. This data breach was officially reported to the Indiana Attorney General in 2026, confirming that unauthorized access to these systems occurred. If you received a data breach notification letter from the firm, it indicates that your personal or financial information may have been compromised during this incident. We recommend reviewing the provided notice carefully to understand the specific steps the firm is taking to assist you with identity monitoring and protection.
If you were affected
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.
Did you receive a letter from Mather & Co CPAs LLC?
A case review is free and confidential. Tell us about your letter and we will explain your options.