How to Run a Background Check and Verify Nanny References
A proper nanny background check in California includes California TrustLine screening, which is the only check authorized by state law to access fingerprint-based FBI and DOJ records.
Quick Answer
A proper nanny background check in California includes TrustLine verification, which is the only check authorized by state law to access fingerprint-based FBI and DOJ records. Private online background checks miss these databases entirely. TrustLine is not optional for California childcare providers.
Why Private Background Checks Are Not Enough
Most online background check services check public records and national sex offender registries. They cannot access fingerprint-based databases maintained by the California Department of Justice, the FBI, or the California Child Abuse and Neglect Reporting Act index. A nanny with a serious California conviction could pass a standard online check and fail a TrustLine check. This is not a hypothetical gap -- it is a documented one.
What TrustLine Checks
TrustLine accesses three restricted databases: the DOJ California criminal history (fingerprint-based), the FBI criminal history (fingerprint-based), and the California Child Abuse and Neglect Reporting Act index. This combination is not available to private companies. It is available only through the California Department of Social Services via TrustLine.
Is TrustLine Required
Yes. California law requires TrustLine verification for in-home childcare providers working with children under 18. This applies to full-time nannies, part-time nannies, newborn care specialists, and family assistants who provide childcare. Any agency that does not require TrustLine for California placements is not meeting the legal standard.
How TrustLine Works
The candidate submits fingerprints and a fee (approximately $135) to the California Department of Social Services. Once cleared, they receive a TrustLine ID number that can be verified by families or agencies at any time. The certification does not expire. Many experienced nannies in Los Angeles already have it completed.
What Else a Complete Background Check Includes
Beyond TrustLine, a thorough vetting process includes a motor vehicle record check (if driving is involved), direct employer reference calls (not written letters), employment history verification, and an in-person or video interview. TrustLine clears the legal floor. References and direct conversation tell you about the person.
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