You ran your pre-employment queries on a promising driver and something came back: a past DOT drug or alcohol violation, and an unfinished SAP follow-up testing plan. Or maybe you already hired them, and the previous-employer inquiry turned it up after the fact.
Either way, you now have a question with real consequences: what exactly are you on the hook for?
The short version: the moment that driver performs safety-sensitive work for you, their follow-up testing plan becomes your responsibility to administer — immediately, not eventually. This guide walks through precisely what that means, what auditors look for, and how to handle it without it becoming a finding.
Table of Contents
- The Short Answer
- How You Find Out a Driver Is in a Follow-Up Plan
- What You’re Legally Responsible For
- The Mistake That Becomes an Audit Finding
- Follow-Up Testing Is On Top of Random Testing — Not Instead Of It
- Who Reports What to the Clearinghouse
- Can You Hand This Off?
- Should You Hire This Driver At All?
- Frequently Asked Questions
- Let Someone Else Run the Program
The Short Answer
Under 49 CFR §40.307, a SAP’s follow-up testing plan follows the employee — to subsequent employers and through breaks in service. It is attached to the driver, not to the employer who was there when it was written.
The regulation is direct about what that means for you: when the employee moves to a new employer, they remain obligated to complete the remaining tests, and “the new employer is responsible for ensuring that the employee does so.” You must immediately resume the follow-up testing the SAP prescribed.
So: not your violation, not your SAP, not your plan — but once they’re driving for you, your obligation to administer.
How You Find Out a Driver Is in a Follow-Up Plan
There are two places this surfaces, and both are things you’re already required to do:
- The previous-employer inquiry (§40.25). This is the mechanism the regulation specifically points to. When you request the driver’s prior DOT testing history, an unfinished follow-up plan should come back with it — including how many tests remain.
- The FMCSA Clearinghouse pre-employment full query. This shows the violation and whether the driver has completed the return-to-duty process. A driver showing “return-to-duty” complete has passed their RTD test — but that does not mean their follow-up plan is finished.
That second point trips people up constantly. “RTD complete” and “follow-up plan complete” are two different things. A driver can be fully eligible to drive and still owe five more observed tests.
If your inquiry didn’t produce the SAP’s follow-up plan, get it. You cannot administer a schedule you don’t have — and “I never received it” is not a defense in an audit.
What You’re Legally Responsible For
Once that driver performs safety-sensitive functions for you, here is the actual list:
- Resume the plan immediately. Not after 30 days, not after orientation. The SAP’s schedule picks up where it left off.
- Ensure every remaining test is completed within the timeframe the SAP set.
- Schedule tests unannounced, with no discernible pattern. The driver cannot know when a test is coming. Testing every driver on the 1st of the month is a pattern — and a finding.
- Use directly observed collections. Under §40.67, return-to-duty and follow-up tests must be directly observed. A standard unobserved collection does not satisfy a follow-up test, even if the result is negative.
- Keep the records. The SAP’s follow-up plan, every test result, and dates — these are what an auditor asks for.
Note that you don’t get to modify the plan. The SAP determines the number, frequency, and duration of tests. Your job is to execute the schedule they wrote, not to redesign it.
The Mistake That Becomes an Audit Finding
The most common failure isn’t refusing to test — it’s testing wrong:
- Using an unobserved collection. The single most frequent error. Follow-up tests must be observed under §40.67. An unobserved follow-up test doesn’t count and has to be redone.
- Counting a random test as a follow-up test. They are separate obligations (more on this below).
- Falling into a pattern. Predictable scheduling defeats the purpose and is a violation in itself.
- Waiting. The obligation starts when the driver starts safety-sensitive duty. A gap between hire date and first follow-up test is exactly what an auditor will ask about.
- Never getting the plan. If you don’t have the SAP’s written follow-up plan, you have no way to prove you administered it correctly.
Any one of these can turn a good-faith hire into a compliance problem — which is precisely why many carriers avoid these drivers entirely.
Follow-Up Testing Is On Top of Random Testing — Not Instead Of It
This is the one that catches carriers most often, so it’s worth being blunt:
Follow-up testing is in addition to all other DOT-required testing. The driver stays in your random testing pool. They remain subject to random selection exactly like every other CDL driver you employ. If they get randomly selected while in a follow-up plan, that random test happens and their follow-up tests continue on the SAP’s schedule.
You cannot substitute one for the other in either direction:
- A random selection does not satisfy a follow-up test.
- A follow-up test does not count toward your random testing rate.
So a driver in a follow-up plan means you’re running two separate testing obligations for the same person — the SAP’s follow-up schedule, and your ongoing random program. If you’re not already running a compliant random pool through a consortium, that’s the bigger exposure of the two. See our DOT random testing program.
Who Reports What to the Clearinghouse
Your Clearinghouse obligations don’t disappear just because the violation happened somewhere else:
- The negative return-to-duty test result and the date the driver completes their follow-up testing plan get reported to the Clearinghouse.
- These can be reported by the employer or by a C/TPA acting on the employer’s behalf (§382.705).
- You still owe your normal annual limited query on this driver, like every other CDL driver in your fleet.
If a C/TPA is handling the driver’s program, they can file these entries for you once you’ve designated them in your Clearinghouse account. If nobody does it, the driver’s record stays open — and that’s a problem for them and a loose end for you.
Can You Hand This Off?
Yes — and this is what most carriers do rather than build the machinery in-house.
A Consortium/Third-Party Administrator (C/TPA) can administer the follow-up testing program on your behalf: hold the SAP’s plan, build the unannounced schedule to the regulation, send the driver to observed collections, manage the MRO review, keep the records, and file the Clearinghouse entries. You designate them in your Clearinghouse account and the program runs.
One important clarification, because it matters legally: handing the work to a C/TPA does not transfer the responsibility. §40.307 puts the duty on you as the employer. What a C/TPA changes is the execution — the schedule is built correctly, the collections are observed, the records exist, and someone is tracking it. If it’s done right, you can demonstrate it. That’s the whole point.
Increasingly, drivers coming out of the SAP process arrive with a C/TPA already managing their program — we cover why from the driver’s side in how to get hired again after a failed DOT drug test. If that’s your applicant, your action item is small: designate that C/TPA and let the existing schedule continue uninterrupted.
If you don’t have a C/TPA yet, you can enroll your company online in a few minutes and we’ll take the follow-up program — and your random pool — off your plate.
Should You Hire This Driver At All?
That’s your call, but decide it on facts rather than instinct.
A driver who completed the SAP process, passed an observed return-to-duty test, and is working through a follow-up plan has been through more scrutiny and more testing than any other applicant in your stack. They are also, statistically, being tested more often than your other drivers for the next one to five years.
The reason many carriers pass isn’t risk — it’s administrative burden. If that burden is handled, either because you use a C/TPA or because the driver already has one, most of the objection goes away. In a market where drivers are hard to find, carriers who understand this rule have access to a pool their competitors won’t touch.
What you should not do is hire the driver and hope the follow-up plan sorts itself out. That’s the version that becomes a finding.
Frequently Asked Questions
Do I have to continue a driver’s follow-up testing from a previous employer?
Yes. Under 49 CFR §40.307, the SAP’s follow-up testing plan follows the employee to subsequent employers and through breaks in service. Any remaining tests must still be completed, and the new employer is responsible for ensuring they are.
When does follow-up testing start for a newly hired driver?
Immediately upon the driver performing safety-sensitive functions for you. The regulation requires the new employer to immediately resume the follow-up testing prescribed by the SAP — there is no grace period.
Do follow-up tests have to be observed?
Yes. Under 49 CFR §40.67, return-to-duty and follow-up tests must be directly observed collections. An unobserved collection does not satisfy the requirement.
Does a random test count as a follow-up test?
No. Follow-up testing is in addition to all other DOT-required testing. The driver remains in your random pool and subject to random selection, and neither type of test satisfies the other.
How many follow-up tests will the driver owe?
The SAP prescribes at least six unannounced tests in the driver’s first 12 months of safety-sensitive duty, and may require more or extend testing for up to 48 additional months — a maximum of 60 months. The SAP determines the schedule; the employer cannot reduce it.
Can a C/TPA administer follow-up testing for me?
Yes. A C/TPA can hold the SAP plan, build and run the unannounced schedule, arrange observed collections, manage MRO review, keep the records, and file the Clearinghouse entries on your behalf once designated. The legal responsibility remains the employer’s.
What if the driver already has a C/TPA managing their program?
Then most of the work is already done. You designate that C/TPA in your Clearinghouse account and the existing schedule continues without interruption — which is exactly why some drivers now arrive with this already set up.
What happens if I don’t administer the follow-up plan correctly?
Failing to conduct required follow-up testing — or conducting it unobserved, on a predictable schedule, or not at all — is a violation that shows up in a compliance review or audit, with the finding against the employer.
Let Someone Else Run the Program
If you’re a small or mid-size carrier, building an unannounced observed-testing schedule for one driver is not a good use of your week — and the cost of getting it slightly wrong is an audit finding.
Vertical Identity administers follow-up testing programs as your C/TPA: we hold the SAP’s plan, schedule the tests to the regulation, get the driver to observed collections nationwide, handle MRO review, file the Clearinghouse entries, and keep the records you’ll need if you’re ever reviewed. And because we run your random testing pool too, both obligations live in one place instead of two.
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Hired a driver mid-plan and not sure where you stand? Call us and we’ll walk you through what you actually owe — no obligation.
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