Product Liability: The Three Claim Types Every Seller Should Know
You do not have to make a product to be liable for it. Everyone in the chain of distribution can be sued — and strict liability means the plaintiff does not need to prove you were careless.
- Three theories dominate: design defect, manufacturing defect and failure to warn.
- Strict liability means a plaintiff need not prove negligence — only that the product was defective and caused harm.
- Everyone in the chain of distribution can be named: manufacturer, importer, distributor and retailer.
- Product liability is part of general liability under products-completed operations, and is frequently sub-limited.
- Vendor indemnity is only worth as much as the vendor’s solvency and insurance — get a certificate and additional-insured status.
The three theories
A design defect means the product was unsafe as designed — every unit shares the flaw. Courts apply either a consumer-expectations test or a risk-utility test weighing the feasibility of a safer alternative design.
A manufacturing defect means the design was sound but this unit departed from it — a contaminated batch, a missed weld, a substituted component. These are the clearest cases to prove and the easiest to trace.
Failure to warn, or marketing defect, means the product lacked adequate instructions or warnings about a non-obvious risk. It is the most common theory in consumer goods, and the one most often decided by the adequacy of a label rather than the engineering.
Strict liability and the chain of distribution
In most states, product claims are governed by strict liability rather than negligence. The plaintiff must show the product was defective, that it was defective when it left the defendant’s control, and that the defect caused injury. They do not have to show anyone was careless.
Because liability attaches to the product rather than the conduct, every commercial participant in the chain of distribution is exposed — the manufacturer, the importer, the distributor, the wholesaler and the retailer. Several states offer a "sealed container" or innocent-seller defence that lets a retailer step aside once the manufacturer is available and solvent. That defence disappears when the manufacturer is overseas and beyond reach, which is precisely the situation most small importers are in.
Where small businesses are most exposed
How the insurance responds
Product liability is not a separate policy for most small businesses; it is the products-completed operations hazard within a general liability policy. Two details decide whether it helps.
First, the aggregate. Products-completed operations usually carries its own aggregate limit separate from the general aggregate — check that yours is not shared or sub-limited. Second, the exclusions. Many small-business policies exclude or sub-limit imported products, specific product categories, recall costs and design work. Recall in particular is a separate coverage: general liability pays for injury caused by the product, not for pulling it off shelves.
Practical risk control
Four measures reduce both frequency and defensibility cost. Keep supplier agreements with explicit indemnity and require a certificate of insurance naming you as additional insured with a copy of the endorsement. Maintain lot and batch traceability so a recall can be narrow instead of total. Retain your labels, instructions and packaging artwork with dates, since failure-to-warn cases turn on what the label said at the time. And document your quality inspection process, because a documented process is the difference between a defensible claim and an indefensible one.