The FMCSA Drug & Alcohol Clearinghouse contains information on all violations of the FMCSA Drug and Alcohol Testing Program incurred by drivers who hold a commercial driver’s license (CDL) or commercial learner’s permit (CLP). These violations include:
If an employer or medical review officer (MRO) enters violation information in your Clearinghouse record that you believe to be inaccurate, you may petition FMCSA to review the information by submitting a driver petition in FMCSA’s DataQs system. Download the Submitting a Petition for Data Review Job Aid for more details.
Note that you are permitted to challenge only the accuracy of information in the Clearinghouse reflected in one of the following categories:
Drivers may not use the petition process to challenge the accuracy of test results or refusals.
To view a Clearinghouse record electronically, a driver must be registered in the Clearinghouse and have verified his or her CDL or CLP information.
If you have completed registration but not verified your CDL/CLP information, log in to the Clearinghouse and navigate to My Driver Profile and click Add CDL#.
Having trouble verifying a CDL? .
If your CDL number has special characters (such as spaces or dashes), try entering the CDL number with or without these characters, as requirements vary by State. If your CDL number begins with a zero, or multiple zeroes, be sure to enter these.
Log in to the Clearinghouse →
Not registered? Register today.
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