What Happens When the Bill of Lading and Commercial Invoice Disagree on Weight
Short answer
A weight mismatch requires checking that both documents describe the same shipment and weight basis. Unresolved inconsistencies can prompt CBP questions, holds or penalty scrutiny; a mismatch alone is not automatically a 19 U.S.C. 1592 violation. Compare gross with gross, reconcile the source records and review any VGM impact before filing.
Why do the two documents disagree in the first place?
The bill of lading is prepared by the carrier from the shipper's booking. The commercial invoice is prepared by the seller from their own records. They are two separate documents created by two separate parties from two separate sources, which is exactly why they drift.
The common causes are transposed digits, net weight recorded on one document and gross weight on the other, a late packing change that updated one document and not the other, and unit conversion between kilograms and pounds.
What does CBP do when it finds a discrepancy?
A weight inconsistency is rarely the end of the matter on its own. What it triggers is scrutiny.
| Stage | What happens |
|---|---|
| Document review | CBP identifies the inconsistency during entry review or a post-entry audit |
| CBP Form 28 | Request for Information asking the importer to explain or substantiate |
| Cargo hold | Cargo may be held pending resolution; charges depend on free time and applicable terms |
| CBP Form 29 | Notice of Action if CBP proposes to change the entry |
| 19 U.S.C. 1592 | Possible penalty proceedings if a material false statement or omission involves the required culpability |
Is a weight discrepancy a 1592 violation?
It can be. 19 U.S.C. 1592 penalises entry of merchandise by means of a material false statement or omission, at three levels of culpability.
The statute also provides an exception that matters here: clerical errors and mistakes of fact are not violations unless they form part of a pattern of negligent conduct. A transposed digit may be a clerical error. Whether repeated errors form a negligent pattern depends on the facts; a discrepancy by itself does not establish materiality or culpability. Compare the same weight basis before treating a difference as an error.
Does the weight affect VGM?
Yes, and this is the part most often missed. Under SOLAS Regulation VI/2 the shipper must provide a verified gross mass before a packed container can be loaded. If the weight on the commercial invoice is the one the shipper used to derive VGM and it is wrong, the container may be refused loading or stowed incorrectly.
SOLAS does not establish a universal percentage or one-tonne tolerance. Check the relevant national rules and carrier requirements. Comparing cargo weights is not the same as verifying the packed container: VGM includes container tare and packing materials.
How can you catch a weight mismatch before filing?
The check is simple and nobody has time to do it manually at volume. For every shipment, compare across all documents: gross weight, net weight, piece and carton count, container and seal number, consignee, and country of origin.
The practical difficulty is that these checks only catch something a small percentage of the time, which is exactly why they get skipped at four in the afternoon with nine entries left in the queue.
For the document workflow described here, see How Jannat AI compares documents against each other.
Which primary sources support this article?
- 19 U.S.C. 1592 — materiality, culpability and clerical-error exception
- CBP Form 28 — Request for Information
- CBP Form 29 — Notice of Action
- IMO — SOLAS VI/2 verified gross mass
This guide is general information, not legal advice. Check current requirements with your customs broker or qualified counsel for your shipment.