Before You File · Contra Costa County

How to File an FBN Statement in Contra Costa County

Contra Costa County fictitious business name statements are filed with the Contra Costa County Clerk-Recorder. Here are the steps, with links to the county's official pages.

Search the name. Use the county's official FBN name search to check whether the name is already on file.
Complete the statement. Follow the Contra Costa County Clerk-Recorder's FBN instructions, listing every business name and every registrant. LLCs, corporations, and limited partnerships also submit a copy of their filed articles from the California Secretary of State.
File and pay the county fee. The county charges $55 (the clerk's fee, which can change — check the county page before filing) for one business name and one registrant. Each additional owner or business name is $5. Card payments carry an extra service fee, and FBN filings are non-refundable.
- In person or drop box: 555 Escobar Street, Martinez, CA 94553
- By mail: 555 Escobar Street, Martinez, CA 94553, with a check or money order payable to "Clerk-Recorder"
- Online: you can complete the statement online, but it must be printed, signed, and submitted with payment
Keep your stamped copy. The clerk stamps it with a file number and filing date. That date starts your 45-day publication clock.

County facts last checked October 2026. Fees and offices change; the official county page is the final word. PublishProof is not affiliated with the county.

After You File: The 45-Day Publication Step

Once the clerk stamps your statement, California law gives you 45 days to start publishing it in an adjudicated newspaper, once a week for four weeks. PublishProof doesn't serve Contra Costa County yet, so don't wait for us if you've already filed.

Contra Costa County Details Check My 45-Day Deadline

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