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United States Department of Transportation
FMCSA - Federal Motor Carrier Safety Adminstration

Drug & Alcohol Clearinghouse

Learning Center / C/TPA

C/TPA

The resources below are designed to help employers of CDL drivers who are subject to FMCSA’s Drug and Alcohol Testing program understand their requirements under the Clearinghouse regulations.

Download Resources for Consortia/Third-Party Administrators

Learn more about which CDL drivers are subject to FMCSA's Drug and Alcohol Testing program.

  1. About the Clearinghouse

    Learn about the Clearinghouse.

  2. Registration

    Visit the Before You Register page to make sure you understand the registration process.

    Registration instructions:

  3. Consent Requests

    Designated C/TPAs may access the Clearinghouse on behalf of employers to request driver consent and query the Clearinghouse for the driver’s record.

  4. Conducting Queries

    C/TPAs may conduct queries on behalf of an employer or student driver if they have been designated to do so.

    How to Conduct a Limited Query
    How to Conduct a Full Query
    Bulk Query Template File
    Query History

    Employers must purchase a query plan to meet their query requirements. C/TPAs cannot purchase query plans on behalf of employers, but can share these materials with employers.
    Query Plan Details | Información de los Planes de Consulta
    How to Purchase a Query Plan

  5. Violations and the RTD Process

    Designated C/TPAs may access the Clearinghouse on behalf of employers to report drug and alcohol program violations of CDL drivers and return-to-duty (RTD) information of CDL drivers.

  6. Other Resources

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