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Confirmed breach

Mercadien, P.C. CPAs data breach

USUnited States

Mercadien, P.C. CPAs (United States) notified the California Attorney General and the Oregon Department of Justice of a data breach on 12 October 2026. The breach began on 17 September 2025, 390 days before it was reported.

If Mercadien, P.C. CPAs had your data

  1. Look for Mercadien, P.C. CPAs’s own notice or letter: it should say what of yours was involved. Keep it.
  2. The register’s list does not say what was exposed; the notice it links to (under Sources) usually does. If Mercadien, P.C. CPAs has a password of yours, change it now to be safe.
  3. Expect scams that use your details: calls, texts or emails pretending to be Mercadien, P.C. CPAs, your bank or the police. Never give codes or passwords, never approve a sign-in you did not start, never move money.

One email to confirm first. We use your address only for this alert, and one click deletes it.

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From the data breach tracker: official notices, breach databases and the news, every fact with its source. Open data (CC BY 4.0) · How the tracker works · Found a mistake? Tell us and we correct it.