✅ Official notice on file. Mercadien, P.C. CPAs filed this data breach notice with the California Attorney General on Oct 20, 2026. Compare it with the letter you received: the official copy is linked below.
Mercadien, P.C. CPAs reported a data breach caused by unauthorized access to its computer network. The information involved includes Social Security number, driver's license / state id, date of birth, financial account / bank info, payment card.
Key facts
| Incident type | Network intrusion |
|---|---|
| Data exposed | Social Security number, Driver's license / state ID, Date of birth, Financial account / bank info, Payment card |
| Reported to California AG | Oct 20, 2026 |
| Company helpline | 1-888-743-0023 |
Free credit monitoring
Mercadien, P.C. CPAs is offering Experian IdentityWorks at no cost to people who received the letter.
What to do now
- Freeze your credit for free at Equifax, Experian and TransUnion, and request an IRS Identity Protection PIN at irs.gov to block fraudulent tax returns in your name.
- Contact your state DMV to ask whether your license number should be replaced, and watch for accounts opened with your ID.
- Your date of birth is often used to verify identity: add a fraud alert to your credit file so lenders must confirm it is really you.
- Call your bank, ask about extra monitoring or a new account number, and review statements for small unknown charges.
- Ask your card issuer to replace the card and review recent transactions; card fraud is usually refunded if reported quickly.
- Get your free credit reports at AnnualCreditReport.com and look for accounts you do not recognize.
- Call the Mercadien, P.C. CPAs helpline at 1-888-743-0023 if you have questions about your letter.
Previous breaches at Mercadien, P.C. CPAs
- Oct 12, 2026
Other recent data breaches
- Deposition Solutions, LLC data breach
- Toyo Tire Holdings of Americas Inc. data breach
- STS Aviation Group data breach
- Alma Family Services data breach
- CDE data breach
Source: notification letter and filing submitted by Mercadien, P.C. CPAs to the California Attorney General. BreachLetter is not affiliated with Mercadien, P.C. CPAs. Details extracted from the official letter; always follow the instructions in your own copy.