This guide is brought to you by DriverPipe — Applicant Tracking, Recruitment Tools, and DQ File Management for small to mid-sized carriers.
This information is provided for general informational purposes only and does not constitute legal advice. Regulations change — motor carriers are responsible for verifying and complying with current FMCSA requirements.
Verification is one piece of the driver qualification file. For the full list of required documents, see our complete DQ file checklist.
When you hire a CDL driver, federal law requires you to look into where they've worked before. Here's what that means in practice — and how to stay compliant without drowning in phone calls and paperwork.
What the Regulation Requires
Federal regulations (49 CFR § 391.23) require you to investigate each driver's safety performance history with DOT-regulated employers where the driver operated a commercial motor vehicle (CMV) within the past 3 years.
This investigation must be completed within 30 days of the driver's start date.
Who You Need to Contact
Only previous employers where the driver operated a CMV under DOT regulation. Non-CMV employers — retail, office work, and the like — don't need to be contacted.
- That the driver was employed or contracted there, including the dates
- Any accidents involving the driver on the employer's accident register (§ 390.15) within the past 3 years
Documenting a Good Faith Effort
You're required to make a good faith effort to reach each previous employer. Every contact attempt — by phone or email — must be documented, even when you never get a response. If an employer never replies, your documented attempts are what demonstrate you met the requirement.
How DriverPipe Makes It Simple
- Previous employers pull straight from the driver's DOT application — no re-typing
- Send a verification request by email directly to each employer from the system
- Replies are recorded automatically and you're notified by email
- Every request, response, and contact attempt is logged and included in the DQ file download
A Separate Requirement: Drug & Alcohol History
Employment and accident verification is one part of § 391.23. The regulation also requires you to investigate a driver's drug and alcohol violation history — but this is handled through a different process.
As of January 6, 2023, a pre-employment Drug and Alcohol Clearinghouse query satisfies this requirement for FMCSA-regulated employers. You no longer need to ask previous employers whether the driver tested positive or refused a test. The query requires the driver's consent, and if a driver refuses to consent to the Clearinghouse query, you can't let them operate a CMV.
One exception: if the driver worked under a DOT mode other than FMCSA, you still request that drug and alcohol information directly from those employers.
Because this runs through the Clearinghouse rather than a previous-employer email, it sits outside DriverPipe's verification flow — but it's part of the complete picture, so we mention it here.
When Is the Verification Complete?
You can consider the employment and accident investigation complete once, for every DOT-regulated employer in the past 3 years:
- Employment and dates are verified (or a good faith effort is documented)
- Accident history from the employer's accident register (§ 390.15) has been requested and reviewed
- All contact attempts and responses are documented, including unsuccessful ones
- The investigation was completed in good faith within 30 days of the driver's start date
If a driver has had no previous DOT-regulated employers in the past 3 years, you simply note that in their work history and the requirement is satisfied.
With DriverPipe, all of this is saved automatically and included as a CSV file in the driver's DQ file — so your documentation is always audit-ready.
Let DriverPipe Handle the Busywork
Previous employer verification is one of those tasks that's simple in theory and tedious in practice — re-typing employer details, chasing replies, and keeping a paper trail that holds up in an audit. DriverPipe is built to take that off your plate:
Previous Employer Verification with DriverPipe
- No data entry — previous employers pull straight from the driver's DOT application
- One-click requests — send a verification email to each employer without leaving the system
- Responses log themselves — replies are recorded automatically and tied to the right driver
- Always audit-ready — every request, response, and attempt is included in the DQ file download
It's part of a complete system for recruiting drivers and managing DQ files — without enterprise software or enterprise pricing.
Stop chasing previous employers by phone.