Your freight gets measured whether you measured it or not
Every LTL terminal has certified scales, and most freight now also crosses a dimensioner — an overhead scanner that photographs each shipment and calculates its exact cube in seconds. Dimensioners are increasingly universal across LTL networks, which means the era of the unverified BOL is over. If the weight, dimensions, or class you declared don't match what the machine finds, the carrier adjusts the bill automatically. This isn't an occasional spot check anymore; it's the default.
What a W&I certificate is
When a carrier adjusts a shipment, it issues a weight and inspection (W&I) certificate — the formal record behind the higher bill. It documents the found weight or dimensions, the corrected freight class, the NMFC item the inspector cited, and often the dimensioner's photos. The W&I cert is the single most important document in any dispute: it tells you exactly what the carrier claims, so you know exactly what evidence you need to counter it. Never pay or dispute an adjustment without reading it first.
Why adjustments happen
- Estimated weights. The declared weight came from a catalog, a guess, or a pre-packaging figure. Pallets alone commonly add 35–50 lbs each — leave them out and the scale will put them back in.
- Wrong freight class. The commodity was classed from habit or an outdated NMFC item rather than measured density. Density-based classes are unforgiving: a few inches of extra height can move a shipment into a costlier class. Our freight class guide covers the system in full.
- Packaging changed the density. The product's spec-sheet density and the shipped pallet's density are different numbers. Crating, void fill, overboxing, and unstackable pallet builds all lower density — and the carrier rates what actually crossed the dock, not what left the factory.
- Vague BOL descriptions. "General merchandise" invites an inspection. A precise description tied to the right NMFC item usually closes the question before it opens — see the bill of lading guide.
What it costs
An adjustment typically hits twice. First, the freight charges are re-rated at the corrected weight or class — commonly the larger number, since a class bump can raise the rate substantially on its own. Second, the carrier adds a reweigh or inspection fee per its tariff. And because adjustments are billed after delivery, they arrive as a higher invoice you didn't see coming — which is exactly why they're the most common surprise charge in LTL.
How to dispute an adjustment
- Request the W&I certificate. You're entitled to see the basis for the charge. Read what was found and which NMFC item was cited.
- Assemble your evidence. Certified scale tickets from your dock, manufacturer spec sheets, photos of the packaged shipment, and your own density math against the cited NMFC item. Opinion doesn't move carriers; documents do.
- File promptly through your 3PL. Dispute windows are short, and a 3PL that handles carrier disputes every day knows each carrier's process and what evidence closes a case. At Logistics Fox, disputes ride on the audit trail — every quote, BOL, and invoice is already matched and on file.
Be honest with yourself first, though: if the scale is right, pay it and fix the process. Most adjustments aren't carrier errors — they're accurate corrections of estimated data.
How to stop getting adjusted
- Weigh and measure every pallet after final packaging. Not the product — the finished, wrapped, palletized shipment. That's what the carrier's scale sees.
- Run the density math before quoting. The density calculator in our freight class guide turns dims and weight into a class in seconds.
- Write accurate BOL descriptions. Specific commodity, correct NMFC item, honest packaging notes — the BOL guide shows what a clean one looks like.
- Audit every invoice anyway. Even a disciplined shipper gets adjustments — and occasionally, wrong ones. FoxIQ Audit compares 100% of invoices against their quotes, so every adjustment is caught, reviewed, and — when the evidence supports it — disputed rather than quietly paid.
Adjustments are one lever among several — for the rest of the cost picture, see how to reduce LTL shipping costs.
