How to Run a CDL Background Check: Step by Step

Knowing what a CDL background check includes and knowing how to run one in the right order are two different things. Get the sequence wrong — pull a report before you have consent, skip the documentation on a prior-employer call, reject a driver without the two-step notice — and a legal hire turns into a compliance violation or a lawsuit. This is the procedure, start to finish: every step, what it requires, whether it’s federally mandated or just smart, and the gotchas that bite recruiters when they’re slammed. Follow it in order and your driver qualification file survives an audit.

Key takeaways

• How to run a CDL background check in plain terms: get standalone FCRA disclosure and consent first, then work through CDL/MVR, the FMCSA Clearinghouse query, the DOT drug test, the §391.23 safety-history investigation, the DOT physical, and the optional PSP, DAC, and criminal checks — and finish with adverse action only if a report is the reason you say no.
• Four steps are federally required for an interstate CDL hire: the Clearinghouse pre-employment full query, the DOT drug test, the MVR, and the §391.23 investigation, plus a valid DOT medical card. PSP and DAC are voluntary tools.
• Order matters. Disclosure and consent come before you pull any consumer report; the §391.23 documentation step gets skipped most often; adverse action is a strict two-step process at the very end.
• The whole procedure captures records, not behavior — so the optional last step is a peer driver-review check that surfaces no-shows and abandoned loads the records never logged.

Before step one: who this sequence is for

This walkthrough is for hiring an interstate CDL (commercial driver’s license — the license required to operate a tractor-trailer or other large commercial motor vehicle, or CMV) driver under the rules of the FMCSA (Federal Motor Carrier Safety Administration, the agency that regulates interstate trucking). Intrastate-only and non-CDL hires follow lighter rules, but the discipline below still protects you. Run it as a true sequence, the same way every time, no matter who’s doing the hiring or how short-staffed you are. For the bigger-picture view of what each record contains, pair this with our truck driver background check guide; to build this into a repeatable program, see background screening for trucking companies.

The CDL background check sequence at a glance

Here’s the whole procedure in order. The prose below the table walks through each step, what it requires, and the compliance gotcha that comes with it.

*Criminal checks are effectively mandatory for the TSA Hazmat endorsement and many secure-facility lanes.

Step 1 — Standalone disclosure and written consent (do this first)

Before you pull a single report, the FCRA (Fair Credit Reporting Act) requires you to give the applicant a clear written disclosure that a consumer report may be used for the hiring decision, and to get their written authorization. The catch that gets carriers sued: under the FTC’s employer guidance, that disclosure has to live in a standalone document — solely the disclosure, nothing else. No liability waiver, no extra policy language, and not buried inside the job application. A non-standalone disclosure is one of the most-litigated FCRA mistakes in hiring. Get this signed before anything else moves.

Step 2 — Collect the driver application

Have the applicant complete the DOT driver application required by 49 CFR §391.21, which must list employment for the past three years (and CDL employment going back further). This isn’t just paperwork — it’s the roadmap for Step 7. The prior employers the driver lists here are the ones you’re legally obligated to investigate, so an incomplete or vague application stalls the whole compliance chain. Cross-check the gaps now, not later.

Step 3 — Verify the CDL and endorsements

Confirm the license is real, current, and the right class for the job, with whatever endorsements the lane requires (Hazmat, Tanker, Doubles/Triples). You verify against the state DMV and CDLIS (the Commercial Driver’s License Information System, the national CDL database). The gotcha here is endorsements and restrictions, not just status — a valid CDL-A with an air-brake restriction or a lapsed Hazmat endorsement can disqualify a driver for a specific run even though the license itself is “active.” Our CDL license verification guide covers exactly what to check.

Step 4 — Pull the initial MVR

Order the MVR (motor vehicle record — the driver’s official licensing and violation history) from every state where the driver held a license in the relevant period. Under 49 CFR §391.25, this is required at hire and then at least once every 12 months, and a designated official has to review each MVR against the disqualification standards and sign off. That signed review goes in the driver qualification file. The gotcha: drivers who’ve moved or held licenses in multiple states. One clean home-state MVR doesn’t clear a violation logged in a state you didn’t pull. See MVR check for CDL drivers for the full procedure.

Step 5 — Run the Clearinghouse pre-employment full query

You cannot let a driver perform any safety-sensitive function until you’ve run a pre-employment full query in the FMCSA Drug & Alcohol Clearinghouse. Per 49 CFR §382.701, a full query returns the driver’s drug-and-alcohol violation history and eligibility status — and it requires the driver’s specific electronic consent submitted inside the Clearinghouse, which means the driver has to be registered there to grant it. This is the gotcha: drivers who aren’t registered create a delay you can’t shortcut, because the consent for a full query lives in the federal system, not on a form you control. Build registration into your pre-hire instructions. Our guides on the Drug & Alcohol Clearinghouse and how to actually run an FMCSA Clearinghouse query walk through both sides.

Step 6 — Send the driver for a DOT drug test

Per 49 CFR §382.301, a driver must pass a pre-employment controlled-substances test before performing safety-sensitive functions — and you must have received a verified negative result from the Medical Review Officer before the driver works. There’s a narrow exception for a driver already participating in a compliant testing program within the prior window, but most carriers test every new hire rather than chase the paperwork to prove the exception. Pre-employment alcohol testing is permitted but not required.

Step 7 — Run the §391.23 safety-history investigation (and document every attempt)

This is the step carriers fumble most. 49 CFR §391.23 requires you to investigate the driver’s safety-performance history with every DOT-regulated employer from the previous three years, generally within 30 days of the hire date. Two parts:

• Accident and employment history comes from contacting prior FMCSA-regulated employers directly — by phone, email, letter, or fax.
• The drug-and-alcohol portion has been satisfied through the FMCSA Clearinghouse since January 6, 2023, not a phone call.

Here’s the documentation gotcha that fails audits. The rule requires a written record for each previous employer contacted, or a good-faith attempt to do so — including the employer’s name and address, the date you reached out or tried, and what you received back. A previous carrier that ignores your request still has to be documented; an undocumented attempt looks identical to no attempt at all when an investigator pulls the file. If the driver had no prior DOT employer in the last three years, you document that. A DAC report can help with the employment-verification piece, but pulling it does not check this box on its own.

Step 8 — Confirm the DOT physical and medical card

Verify the driver holds a current medical examiner’s certificate from an examiner on the National Registry, certifying they meet the physical qualification standards of 49 CFR §391.43 (and §391.41). Many drivers arrive with a valid card already; if it’s expired or borderline, schedule the physical before the driver runs. The gotcha is expiration timing — a card that lapses two weeks into employment is a compliance problem you own, so check the date, not just the existence of the card.

Step 9 — Pull the PSP report

PSP (the Pre-Employment Screening Program) is FMCSA’s record of a driver’s crash and roadside-inspection history, pulled from the federal MCMIS database — the last five years of crashes and three years of inspections. It’s voluntary, but at a published $10 per report it’s cheap, high-signal insurance that surfaces hours-of-service violations and out-of-service orders an MVR won’t show. It requires the driver’s written consent, which you already secured in Step 1. See what is a PSP report and how to pull a PSP report for the mechanics.

Step 10 — Pull the DAC report

The DAC report (Drive-A-Check, now run by HireRight) is an employer-reported file on a driver’s work history: employment dates, reason for leaving, rehire eligibility, DOT-recordable accidents, and drug-and-alcohol data. It’s voluntary and only as complete as past carriers made it — useful, but never a substitute for the §391.23 calls. Because it’s a consumer report under the FCRA, the consent you got in Step 1 covers it, and adverse action in Step 13 applies if a DAC entry is your reason for rejecting. Our DAC report guide covers reading it without getting burned by a misfiled “not eligible for rehire” flag.

Step 11 — Run criminal and Hazmat checks as the lane requires

A criminal background check isn’t federally required for a standard CDL hire, but it’s standard practice and effectively mandatory in two cases: the TSA-administered background check that comes with the Hazmat endorsement, and the security requirements of many shippers and secure facilities. Match the depth of this check to the lane, and remember it’s a consumer report — same FCRA rules.

Step 12 — Check the driver’s peer reputation

Everything above pulls a record. None of it logs behavior — and that’s the optional step that catches the legal-on-paper, disaster-in-practice driver before you hand over keys. (More on this in the bridge below.)

Step 13 — Run adverse action if a report is your reason for “no”

If you decide to reject the driver because of something in a consumer report — DAC, PSP, criminal, a CRA-run package — the FCRA requires a strict two-step process, not a single rejection email. Per the FTC’s adverse-action guidance: first send a pre-adverse-action notice with a complete copy of the actual report and the CFPB’s “A Summary of Your Rights Under the FCRA,” give the driver a reasonable window — commonly treated as about five business days — to dispute or explain, then send a final adverse-action notice. The gotcha: the pre-adverse-action copy has to be the real report, not a summary, so the driver can see exactly what you saw. Skipping the waiting period is where the lawsuits land.

The bridge: the records are filed, but the behavior isn’t

Work through all thirteen steps cleanly and you have a compliant, audit-ready file. What you don’t have is any read on how this driver actually behaves on the job. Every step above captures something a system recorded — a violation, a query result, a test result, a separation code. Not one of them has a field for the no-show to orientation, the load abandoned 800 miles from the yard, the driver who quits the morning of dispatch, or the equipment returned trashed. A DAC entry might exist, but only if a past carrier bothered to file it — and most small and mid-size fleets never do.

That’s the gap the optional Step 12 closes. A peer-sourced driver-review database like cdlscan.com lets you search a driver by name and read what past carriers said about reliability and rehire-worthiness — the behavior the formal records leave out. It’s honest about its place in the sequence: the peer driver-review database is the added behavior layer, the optional final check. It never replaces a required MVR, Clearinghouse, drug test, or §391.23 investigation — it catches what those checks structurally can’t. (CDLScan lists more than 1 million driver reviews and runs around 23,419 searches a week; the search itself is free, with a full report starting at $2.75.) For how to read those reviews like a recruiter, see truck driver reviews, and to lock the whole sequence into a repeatable form, our trucking new-hire vetting checklist.

Frequently asked questions

How do you run a CDL background check, step by step? Get a standalone FCRA disclosure and written consent first, then collect the driver application, verify the CDL and endorsements, pull the MVR, run the Clearinghouse pre-employment full query, send the driver for a DOT drug test, complete and document the §391.23 safety-history investigation of the past three years, confirm a valid DOT medical card, and add PSP, DAC, and criminal checks as needed. Run adverse action last, only if a report is your reason for rejecting.

What’s the very first step in the CDL hiring screening process? A standalone FCRA disclosure and the applicant’s written authorization — before you pull any consumer report. The disclosure has to be its own document containing nothing but the disclosure; burying it in the job application is a common and expensive FCRA mistake.

Which steps in a truck driver background check are legally required? For an interstate CDL hire: the Clearinghouse pre-employment full query, the DOT pre-employment drug test, the MVR (at hire and annually), the §391.23 safety-history investigation, and a valid DOT medical card. PSP, DAC, and criminal checks are recommended but not federally mandated for every driver.

How do I document the §391.23 investigation correctly? Keep a written record for each prior DOT-regulated employer from the past three years: the employer’s name and address, the date you contacted them or attempted to, and what you received back. Document non-responses too — an undocumented attempt looks the same as no attempt in an audit. The drug-and-alcohol portion is handled through the Clearinghouse, not a phone call.

Do I need the driver’s consent for every part of the check? Effectively, yes — but it comes in two forms. The FCRA requires standalone written consent before any consumer report (DAC, PSP, criminal), and the Clearinghouse full query requires the driver’s separate electronic consent submitted inside the federal system. The driver must be registered in the Clearinghouse to grant that one.

What’s the adverse-action process if I reject a driver over a report? Two steps. Send a pre-adverse-action notice with a complete copy of the actual report and the FCRA “Summary of Your Rights,” wait a reasonable period (commonly about five business days) for the driver to dispute, then send a final adverse-action notice. The copy has to be the real report, not a summary.

Can a driver pass every required step and still be a bad hire? Yes, and it happens constantly. The required steps capture records — violations, crashes, test results, separation codes — not behavior. A driver with a clean MVR, clean PSP, and clean Clearinghouse query can still have left their last three carriers stranded, which is why a peer driver-review check is worth adding as the optional final step.

How long do I keep these background check records? Keep each driver’s qualification file for as long as they’re employed plus three years after they leave, per 49 CFR §391.51. The MVR review, Clearinghouse query, drug-test result, §391.23 documentation, and medical card all belong in that file.