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What is a pre-employment background and previous employer check?
Last Updated: 09/24/2026
It is a request to an applicant's previous DOT-regulated employers for their drug and alcohol testing history, made with the applicant's written consent, before the person performs safety-sensitive functions for you.
- All DOT agencies: 49 CFR 40.25 sets out what to request and from whom.
- FMCSA drivers: 49 CFR 391.23 also requires a safety performance history investigation, and 49 CFR 382.701 requires a pre-employment Clearinghouse query.
Med-Stop provides request forms under Employment forms. Record previous employers on the employee's History screen. Your company remains responsible for completing the check.
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