The MCS-90 endorsement says the carrier has the federally required minimum coverage. It does not say the underlying policy covers the load. Brokers and shippers conflate the two all the time. After Montgomery that's a discovery problem.

I've seen the same conversation play out three times in the last six months. A load goes wrong, the cargo is damaged or someone gets hurt, the broker says "we verified insurance — the carrier had an MCS-90 endorsement on file," and then the carrier's insurer turns around and denies the claim because the underlying policy excluded the activity that caused the loss. The broker is confused. The shipper is angry. The plaintiff's lawyer is delighted, because now there's a documented gap between "what the broker verified" and "what was actually in force."

The MCS-90 endorsement is one of the most misunderstood pieces of motor-carrier insurance, and brokers who don't understand it are walking around with a defense they think they have and don't.

What MCS-90 actually is

The MCS-90 is a **federal endorsement to a motor carrier's liability policy**. It's required under 49 CFR § 387.7 and § 387.15 for interstate motor carriers of property as a condition of operating authority. The endorsement says, in effect:

> "Even if the underlying policy would exclude this loss, the insurer agrees to pay any final judgment recovered against the insured by a third party for bodily injury or property damage caused by the negligent operation of the motor vehicle, up to the federal minimum coverage limit."

There are two ways to read that sentence and they lead to opposite places. Let me work through each.

The reading brokers gravitate to: "Great — the MCS-90 means the carrier is covered, no matter what." That's the mental shortcut that gets brokers in trouble.

The reading that actually maps to what the endorsement does: the MCS-90 is a federal safety net that protects **the injured third party**, not the carrier. The insurer pays the third party even if the underlying policy would have denied — but the insurer can then turn around and **sue the carrier** to recover what they paid out. The carrier is on the hook to reimburse the insurer.

That distinction matters because of who the broker's diligence file is actually for. If you're documenting that "the carrier had liability coverage in force for this load," the MCS-90 doesn't get you there. It gets you "the carrier had federally mandated financial responsibility on file at the agency," which is a different — and much weaker — fact.

A concrete scenario

You tender a $185,000 load of consumer electronics on MC-1392418 / DOT-3017294. Carrier sends an ACORD 25. Auto liability $1M, cargo $100K, MCS-90 endorsement noted in the description-of-operations field. Looks comprehensive. You tender.

Mid-trip the driver decides to swing through a relative's farm to pick up some hay on the side. Tractor-trailer is now in a use that the underlying auto-liability policy excludes — the policy was scoped to "transportation of property under contract for hire," not personal errands. Driver rear-ends a four-wheeler. Injuries. Lawsuit.

What happens, in order:

1. The injured plaintiff sues the driver, the carrier, AND the broker for negligent selection.

2. The carrier's insurer reviews the claim, identifies the excluded use, and **denies coverage** under the underlying auto policy.

3. The plaintiff's lawyer points to the MCS-90 endorsement on file with FMCSA. The insurer is now obligated to pay the plaintiff up to the federal minimum ($750K for general freight under 49 CFR § 387.9) — but ONLY because of the MCS-90, not because the policy covered the loss.

4. The insurer pays the plaintiff $750K. Then **sues the carrier** to recover that money under the indemnification right baked into the MCS-90.

5. The carrier doesn't have $750K. They default. The plaintiff still has a $1.4M judgment to collect. They come back to the broker (you) for the difference.

Your defense is going to depend on what your file shows about insurance. If your file says "verified MCS-90 endorsement on file with FMCSA," the plaintiff's lawyer will gently ask whether you understood what an MCS-90 actually covers. If the answer is no, they'll argue you were negligent in conflating regulatory minimum-responsibility with actual operational coverage. They'll be right.

The regulation, in plain English

49 CFR § 387.7 requires interstate motor carriers of property to maintain a minimum level of bodily-injury and property-damage liability insurance and to evidence it via a BMC-91 or BMC-91X filing with FMCSA. § 387.15 sets out the form of the endorsement (the MCS-90) that's attached to the underlying policy. The endorsement is required because Congress wanted to make sure innocent third parties injured by motor carriers always had a source of recovery — even when the carrier's commercial insurance had a coverage gap.

What this means at load-tender time: when you see an MCS-90 endorsement noted on an ACORD 25, what you've verified is that the carrier has federal minimum financial responsibility on file. You have **not** verified that the underlying policy will pay your specific load if a loss happens. To verify that, you have to look at the actual policy form — the named insured, the schedule of vehicles, the operations classification, the cargo coverage form's exclusions. The producer call I've talked about before is what gets you closer to this. The MCS-90 alone gets you nowhere.

How to read what's actually in force

Three things to ask the producer (the agent on the ACORD 25) when you call:

One. "Does the auto-liability policy schedule include the specific equipment on this load, and is the operation classification consistent with general freight under contract for hire?" If the carrier has a fleet of dry vans on the policy schedule and you're tendering a flatbed haul, that's a coverage gap waiting to happen. The producer can tell you on the spot.

Two. "Are there any exclusions on the cargo policy that apply to this commodity?" Cargo policies routinely exclude high-value electronics, tobacco, alcohol, jewelry, pharma. If you're moving any of those, the standard cargo coverage may not pay.

Three. "Is the MCS-90 the only thing standing between this load and a coverage denial, or is the underlying policy a clean primary auto-liability with no aviation/loading/excluded-territory carve-outs?" If the producer hesitates or says "well, technically the MCS-90 would still pay…" — that's your answer. The producer is telling you the underlying policy has gaps.

These three questions take about four minutes total. The clarity they get you is the difference between "verified coverage" and "we trusted the certificate."

Where the MCS-90 still helps

I'm not saying the MCS-90 is useless. It's a federally mandated backstop that exists for the right reasons — without it, plaintiffs would have very little to recover from financially marginal carriers. For the broker's file, the MCS-90 is part of the record. It's just not the **whole** record.

The version of the diligence file I want my team building includes:

The L&I record showing BMC-91 / 91X filing in good standing (federal minimum confirmed).
The ACORD 25 from the carrier or producer.
A producer-call note documenting that the underlying policy covers this specific operation, this commodity type, and this geographic area, with no live exclusions that would gut the coverage.
A note documenting that you've reviewed the cargo coverage form (or the producer has confirmed) for any commodity-specific exclusions that apply to the load.
The carrier's signed safety attestation, which includes the representation that "the liability and cargo insurance shown on our L&I filing is in force and we are aware of no notice of cancellation, lapse, or coverage reduction."

Five line items. Maybe seven minutes of work for a load with any meaningful value. After Montgomery v. Caribe Transport II eliminated FAAAA preemption as an early dismissal, this is the work that separates a defensible file from a settlement check.

How I document this

For any load over about $50K in declared value, the carrier file contains:

1. **The L&I record** showing the form filing (BMC-91 or 91X), the insurer, and any cancellation flag.

2. **The ACORD 25** as received, with the MCS-90 noted if applicable — but **not** treated as a substitute for actual coverage review.

3. **A producer-call note** with three timestamped facts: policy is in good standing as of today; underlying policy covers the operation type of this load; no commodity-specific cargo exclusions apply.

4. **A short rationale paragraph** in the carrier file: "Verified BIPD on L&I + producer call confirmed policy current and applicable; no MCS-90-only gap."

When that file ends up in front of a plaintiff's lawyer, the difference between "we saw an MCS-90" and "we verified the underlying policy covers this operation" is the difference between losing and winning the negligent-selection question.

— Mason Lavallet

Founder, DOTScreener.com

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Sources

[49 CFR § 387.7 — Financial responsibility, motor carriers of property](https://www.ecfr.gov/current/title-49/subtitle-B/chapter-III/subchapter-B/part-387/section-387.7)
[49 CFR § 387.15 — Forms of endorsements for policies of insurance and surety bonds](https://www.ecfr.gov/current/title-49/subtitle-B/chapter-III/subchapter-B/part-387/section-387.15)
[49 CFR § 387.9 — Financial responsibility, minimum levels](https://www.ecfr.gov/current/title-49/subtitle-B/chapter-III/subchapter-B/part-387/section-387.9)
[FMCSA — Insurance Filing Requirements and the BMC-91 / 91X](https://www.fmcsa.dot.gov/registration/insurance-filing-requirements)
[Hanson Bridgett — Montgomery v. Caribe Transport II analysis](https://www.hansonbridgett.com/publication/260514_8509_supreme-court-faaaa)

The MCS-90 Trap: Why That Endorsement Doesn't Protect You The Way You Think