Short answer
An unattended vehicle exclusion is wording in many motor truck cargo policies that removes or limits theft coverage when the truck or trailer is left unattended, unless conditions in the policy are met. Common conditions are that the cargo is in a fully enclosed, securely locked body and there is visible evidence of forced entry.
- The exact wording decides claims. Definitions of "unattended," "secured lot" and "forced entry" vary from policy to policy.
- Flatbed and open-deck cargo often cannot meet a "fully enclosed and locked" condition at all, so check how your form treats it.
What the wording usually looks like
Motor truck cargo is an inland marine coverage for property in transit, and cargo forms are not standardized across insurers, so theft conditions differ. A real example: in a 2003 Fifth Circuit case appealed from the federal district court in Houston, the cargo policy excluded theft while property in or on a vehicle or trailer is unattended, unless the property was in a fully enclosed and securely locked body or compartment and there was visible evidence of violent, forcible entry. The insurer denied the claim because it found no visible forced entry into the trailer. (The appeal was decided on other policy conditions, but the exclusion wording is typical.)
Other versions you may see in policies:
- Coverage only if the vehicle is in a fenced, locked, or guarded lot
- A definition of "attended" that requires someone in the cab or within sight of the vehicle
- A time limit, for example coverage for overnight parking only at listed locations
- Separate, lower limits for theft from unattended vehicles
Where cargo coverage commonly falls short
Why it matters more than most exclusions
Drivers have to stop. Hours-of-service rules require breaks, and loads sit at truck stops, receivers' gates and drop yards. Each of those stops is a moment when a strict unattended wording can turn a theft into an uncovered loss. If the freight is high-value, the gap is large. Read this exclusion alongside does cargo insurance cover theft and what does cargo insurance exclude.
| Question | Why it matters |
|---|---|
| How does the policy define "unattended"? | Decides whether a driver in the restroom counts as attended |
| Is a locked, enclosed body required? | Open-deck loads may never qualify |
| Is visible forced entry required? | Thefts using cut seals or keys may leave no visible damage |
| Are secured-lot conditions listed? | A truck stop lot may not qualify |
| Does theft of the whole trailer count? | Some forms treat it differently from theft from the trailer |
How to reduce the gap
- Read the form, not the certificate. Certificates list limits, not theft conditions.
- Match operations to the wording. If the form requires a secured lot, plan stops accordingly and keep proof (gate logs, receipts).
- Ask about broader theft wording. Some cargo programs offer less restrictive conditions, sometimes at a higher price or with security requirements such as kingpin locks or GPS tracking.
- Tell your agent about high-value freight before you haul it. A higher limit does not help if the theft condition excludes the loss. Our motor truck cargo insurance page covers how limits and conditions fit together, and how much cargo insurance brokers require covers the contract side.
Brokers read this too
Some broker agreements require that cargo coverage have no unattended vehicle exclusion, or a limited one. If your agreement says that, have the actual form reviewed before you sign.
Common questions
Is the unattended vehicle exclusion in every cargo policy?
No. Cargo forms are not standardized, so some have strict unattended conditions, some have milder ones, and some can be broadened. Only the form tells you.
Does locking the cab count as a locked body?
Usually not. Wording like "fully enclosed and securely locked body or compartment" generally refers to where the cargo is, not the cab. Read your form.
Can a court decide the wording is ambiguous?
Courts have reached different results on different wordings. That is a legal question, so talk to an attorney if a claim is denied.
Sources
- U.S. Court of Appeals for the Fifth Circuit, No. 03-20005 (2003, unpublished). Example of an unattended-trailer theft exclusion requiring a locked, enclosed body and visible forcible entry.
- IRMI, Motor truck cargo (glossary). Motor truck cargo as an inland marine coverage for property in transit.
This page explains insurance, not law. Have your attorney review indemnity and contract language; our job is making the insurance match it.
Keep reading
Coverage
Motor truck cargo insurance: what it pays, what it leaves out, and what brokers check
Questions
Does cargo insurance cover theft?
Questions
What does cargo insurance exclude?
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A broker sent me a carrier agreement. What insurance does it actually require?
By operation
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