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MonitoringCaliforniaFiled May 20, 2026

Understanding your Frost Bank data breach notification letter

If a Frost Bank 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

Frost Bank filed a data breach notification with California authorities on May 20, 2026, stemming from an incident dated December 6, 2025. The breach exposed sensitive personal and financial information, including Full Name, Social Security Number, and Financial Account Number. Individuals affected may face increased risks of fraud or identity theft from this event.

Information the filing reports as involved

  • Full Name
  • Social Security Number
  • Financial Account Number
  • Routing Number
  • Date of Birth
  • Credit Score Information
  • Transaction History
  • Mailing Address

What to do after the letter

  1. Confirm the notice is genuine

    A legitimate Frost Bank notice references the specific incident reported to the California 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.

  2. 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.

  3. 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.

  4. Check the record against the public filing

    You can verify the Frost Bank incident against the filing reported to the California Attorney General. This registry summarizes what was filed; it does not provide legal advice.

This page summarizes a data breach reported to the California Attorney General for informational purposes. DataBreachInformation.com is a neutral reference registry and does not provide legal advice.

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