On Thursday, April 2, 2026, from 8 p.m. to 9 p.m. Eastern Time, Clearinghouse users will not be able verify driver CDL information due to system maintenance on the Commercial Driver Licensing Information System (CDLIS) Gateway.
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United States Department of Transportation
FMCSA - Federal Motor Carrier Safety Adminstration

Drug & Alcohol Clearinghouse

Enforcement Resources

The resources below have been developed to inform FMCSA and State enforcement personnel and other key stakeholders about the Drug and Alcohol Clearinghouse.

Fraud Alert: Fraudulent SAPs Entering False Clearinghouse Violations

Scammers are convincing commercial drivers to share their commercial driver’s license (CDL) number, date of birth, and first and last names. This may be under the guise of a Substance Abuse Professional (SAP) resolving open violations, or an Employer willing to report negative results for tests that don’t exist. Once the scammer has the driver’s CDL or commercial learner’s permit (CLP) information, they use the information to enter fraudulent drug and alcohol program violations on the driver’s record unless they receive payment. CDL and CLP holders are reminded to protect their personal identifiable information (PII) and only share personal information, like their CDL number and date of birth, for legitimate business purposes. To report instances of this fraud scheme, please contact the FMCSA Clearinghouse Team. For more information, visit the Clearinghouse News page.

Outreach Materials

  • Clearinghouse Outreach PPT (revised 11/18/21): This PowerPoint presentation was created to assist enforcement personnel in educating the industry about the Clearinghouse. This was updated in November 2021 to include new information on the second Clearinghouse final rule.

  • NEW: Driver Return-to-Duty Visor Card: SDLAs can share this with drivers who lose their commercial driving privileges due to a "prohibited" Clearinghouse status. The insert summarizes the steps a driver must take to complete the return-to-duty (RTD) process.

Enforcement Quick Reference Guides

Use the one-page quick reference below to help direct any complaints you may receive from drivers or employers about information recorded in the Clearinghouse. Download Where to Direct Complaints About the Drug and Alcohol Clearinghouse

The guide below is intended to assist FMCSA field staff in responding to industry questions related to the Clearinghouse system update on June 12, 2020. Download the Enforcement Quick Reference Guide (June 2020)

Enforcement Training

Field Information Session on the Second Clearinghouse Final Rule

FMCSA Enforcement Training Webinars

December 2019 and January 2020

State Enforcement Training Webinars

December 2022 training for State safety investigators and safety auditors

December 2019 and January 2020

Accessing the Clearinghouse as Enforcement Personnel

Enforcement personnel can access the Clearinghouse directly using their Portal credentials. You must have the correct Portal user role assigned. See the job aid below for instructions on how to request this user role.

Download How to Request a Clearinghouse Portal User Role: Enforcement Personnel

Resources for Clearinghouse Users

User Registration

Users can register online at: https://clearinghouse.fmcsa.dot.gov/register.

Download the Instructional Job aids:

Linking to the Portal for Motor Carriers

Employers who have a Portal account will need to follow the instructions below to make sure they have the correct Clearinghouse Portal user role.

Download How to Request the Clearinghouse Portal User Role

Note: Linking a Portal and Clearinghouse account will tie an employer's Clearinghouse activity to the USDOT Number associated with their Portal account(s).

Clearinghouse Learning Center

Many more educational materials for Clearinghouse users are available online at the Clearinghouse Learning Center.

Need more information?

Check the Clearinghouse frequently asked questions or contact clearinghouse@dot.gov.