Understanding your 21st MidAmerica Credit Union data breach notification letter
If a 21st MidAmerica Credit Union letter arrived in your mailbox, here is what it means, why you received it, and the free steps you can take right now.
Why you received this letter
21st MidAmerica Credit Union, based in Indiana, officially reported a data security incident on January 22, 2026, stemming from an event on August 14, 2025. This breach exposed highly sensitive personal and financial data, potentially impacting its members through identity theft risks and financial fraud.
Information the filing reports as involved
- Full Name
- Social Security Number
- Date of Birth
- Financial Account Number
- Routing Number
- Credit Score Information
- Transaction History
- Mailing Address
What to do after the letter
Confirm the notice is genuine
A legitimate 21st MidAmerica Credit Union notice references the specific incident reported to the Indiana Attorney General and describes which categories of your information were involved. Compare the letter against the public filing before acting on any links or phone numbers it contains.
Keep the letter — it is your proof of connection
The notification letter is the document that ties your personal information to this incident. Keep the original and photograph it. If you later request a case review, this letter is the strongest evidence that you were among the affected individuals.
Protect your accounts and credit
Depending on what was exposed, consider a free credit freeze with all three bureaus, new passwords for reused credentials, and monitoring of financial statements. These steps are free and do not require you to wait for anyone's permission.
Check the record against the public filing
You can verify the 21st MidAmerica Credit Union incident against the filing reported to the Indiana Attorney General. This registry summarizes what was filed; it does not provide legal advice.
This page summarizes a data breach reported to the Indiana Attorney General for informational purposes. DataBreachCaseFile.com is a neutral reference registry and does not provide legal advice.