CDL Verification in the Hiring Process: What Carriers Must Check

A photocopy of a driver's CDL in the qualification file is not enough. FMCSA requires carriers to verify that the license is valid, current, and appropriate for the vehicles the driver will operate. Hiring a driver with an expired, suspended, or wrong-class CDL is a serious violation — and it happens more often than most fleet managers expect.

This guide covers what carriers must check when verifying a CDL, how to verify through official channels, the endorsement requirements for different cargo types, and the common mistakes that lead to audit violations.

What FMCSA Requires for CDL Verification

Under 49 CFR §391.23, carriers must investigate every prospective driver's driving record before allowing them to operate a CMV. This includes obtaining a Motor Vehicle Record (MVR) from every state where the driver held a license in the past 3 years — and that MVR serves as the primary verification of the CDL's status.

Additionally, §391.51 requires a copy of the CDL in the driver qualification file. But the copy itself is just documentation. The real verification comes from confirming the following:

• License validity — the CDL is not expired, suspended, revoked, or cancelled
• License class — the class (A, B, or C) matches the vehicles the driver will operate
• Endorsements — any required endorsements are present and current
• Restrictions — no restrictions that would prevent the driver from performing their assigned duties
• State of issuance — the driver holds only one CDL (federal law prohibits holding CDLs from multiple states)

CDL Classes and Vehicle Requirements

The CDL class determines which vehicles a driver is qualified to operate. Hiring a driver for a vehicle that exceeds their license class is a disqualifying violation:

Class A includes the authority to operate Class B and C vehicles. Class B includes authority for Class C. Always verify the class on the CDL matches your fleet's equipment before the driver's first day.

Endorsements: What They Are and When You Need Them

CDL endorsements authorize a driver to operate specific types of vehicles or carry certain cargo. Each endorsement requires passing an additional knowledge test (and sometimes a skills test) at the state DMV.

The most common hiring mistake related to endorsements is assuming a Class A CDL alone is sufficient for all trucking operations. A driver hauling a fuel tanker needs both the N (tank) endorsement and potentially the H (hazmat) endorsement. A driver without the proper endorsement is unqualified — period.

CDL Restrictions

Restrictions limit what a driver can do with their CDL. Common restrictions include:

• L — Air brake restriction — driver cannot operate vehicles with air brakes (tested without air brakes during skills exam)
• Z — No full air brake equipped CMV — similar to L, limited to vehicles with air-over-hydraulic brakes
• E — Automatic transmission only — driver tested in an automatic and cannot operate manual transmission CMVs
• O — No tractor-trailer — Class A obtained in a non-tractor-trailer combination
• K — Intrastate only — driver is restricted to operating within a single state
• V — Medical variance/waiver — driver operates under a medical exemption

Check restrictions against your fleet's equipment. If all your trucks have manual transmissions and the driver has an automatic-only restriction, they are not qualified to drive your equipment — even though they hold a valid CDL.

How to Verify Through State DMV and CDLIS

The Commercial Driver's License Information System (CDLIS) is the federal database that connects all state DMV systems. It ensures a driver can hold only one CDL and allows carriers to verify license status across states.

Verification methods:

• MVR pull — ordering an MVR from the driver's licensing state provides current license status, class, endorsements, restrictions, and violation history
• CDLIS check — included as part of the MVR process in most states; confirms the driver does not hold CDLs in multiple states
• Online verification portals — some states offer real-time online CDL status lookup (availability varies by state)
• Third-party verification services — providers like Checkr or SambaSafety can pull MVRs and CDLIS data across all states

The MVR is the gold standard for CDL verification because it provides the most comprehensive and current information. A photocopy of the CDL shows what the card said when it was printed — the MVR shows the license's actual current status.

CDL Copy vs. CDL Verification

There is an important distinction between having a CDL copy on file and having verification of the CDL:

Both are required. The copy goes in the file for documentation. The MVR provides the actual verification that the license is valid and appropriate. Never rely on the CDL copy alone — a driver could hand you a copy of a license that was suspended last month.

Ongoing CDL Monitoring

CDL verification is not a one-time event. During employment, carriers must:

• Pull annual MVRs — required under §391.25, which shows current CDL status and any new violations
• Track CDL expirations — CDL renewal periods vary by state (typically 4–8 years)
• Monitor endorsement status — endorsements can be removed if a driver fails to renew required checks (e.g., TSA background for Hazmat)
• Watch for restrictions added — medical conditions or violations can result in new restrictions being added to the CDL

Continuous MVR monitoring services can automate this by alerting you whenever a change occurs on a driver's record — including license status changes, new violations, and endorsement modifications.

Common CDL-Related Hiring Mistakes

These mistakes appear repeatedly in DOT audits and can be avoided with a basic verification checklist:

• Accepting an expired CDL — always check the expiration date on both the physical card and the MVR
• Not verifying endorsements for the assigned work — assuming a Class A covers everything, when endorsements may be required for specific cargo
• Ignoring restrictions — not checking whether the driver has air brake, automatic transmission, or intrastate-only restrictions
• Relying on the CDL copy without pulling an MVR — the copy could be outdated; the MVR shows current status
• Not checking for multiple CDLs — federal law prohibits holding CDLs from more than one state; CDLIS verification catches this
• Waiting too long to verify — CDL verification must happen before the driver operates a CMV, not during the first week of employment
• Missing the Hazmat renewal cycle — Hazmat endorsements require a TSA background check every 5 years; an expired check means an invalid endorsement

Key Takeaways

CDL verification is one of the most straightforward parts of the hiring process, but it requires attention to detail. Copy the CDL for the file, pull the MVR for verification, confirm the class and endorsements match the work, check for restrictions that conflict with your equipment, and verify the license is currently valid — not just valid when it was printed. Do this for every hire, and repeat the verification annually through MVR reviews. The carriers that skip or shortcut this step are the ones who discover the problem during an audit or after an accident — when it is too late.