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Interior Federal Credit Union Data Breach Lawsuit Investigation
Shamis & Gentile P.A., one of the nation's premier class action law firms specializing in data breach cases, is investigating the Interior Federal Credit Union data breach.
If you were affected by the data breach, your sensitive personally identifiable information may have been exposed, and you may be eligible for compensation.
About Interior Federal Credit Union
Interior Federal Credit Union is a member-owned financial institution that primarily serves individuals connected to the U.S. Department of the Interior, as well as select partner organizations. Founded in 1935, it operates as a not-for-profit credit union, focusing on providing value to its members through competitive rates and lower fees.
The credit union offers a variety of banking services, including savings and checking accounts, loans, credit cards and access to a large shared branch and ATM network. Membership is generally open to employees, volunteers and family members of the Department of the Interior, along with certain other groups.
What Happened?
On Aug. 14, 2025, Marquis Software Solutions, a vendor providing digital and physical marketing services to Interior Federal Credit Union and other institutions, detected suspicious activity on its network. Marquis determined it was the victim of a ransomware attack after an unauthorized third party accessed its network through a SonicWall firewall. The breach was limited to Marquis’ systems; Interior Federal’s internal systems were not directly impacted.
A forensic investigation revealed that files containing sensitive personal information provided by business customers, including Interior Federal, may have been accessed and acquired by the unauthorized party. Marquis notified affected business customers in November 2025, and began working with them to notify individuals and regulatory agencies.
Possible Information Exposed
- Names
- Addresses
- Dates of birth
- Phone numbers
- Social Security and tax ID numbers
- Financial account information
As of the most recent disclosures, 52 Interior Federal Credit Union members in Maine, 495 in Washington and 149 in Iowa were reported as affected.
Your Rights and Next Steps
If you received a notice about this data breach or believe your information may have been involved, it is important to take action. The exposed data includes highly sensitive details that could put individuals at risk for identity theft or fraud.
Here’s what affected individuals can do:
- Take advantage of complimentary credit monitoring and identity theft protection services being offered as part of the notification process
- Review account statements and credit reports for any unauthorized activity for at least the next 12 to 24 months
- Place a fraud alert or security freeze on credit reports with the major credit bureaus to help prevent new accounts from being opened in their name
- Report any suspicious or fraudulent activity to their financial institution, law enforcement and the Federal Trade Commission
Lawyers are ready to help those affected understand their rights and options. Individuals may be entitled to compensation for damages suffered as a result of this breach, including costs related to credit monitoring, identity theft, or time spent addressing potential fraud.
You May Be Entitled to Compensation
If you were affected by the Interior Federal Credit Union data breach, you may have legal rights to compensation. Lawyers are ready to help guide you through the process and determine if you are eligible to join a class action lawsuit seeking damages for the exposure of your personal information.
To find out if you qualify, complete the below form to join the lawsuit investigation.
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