When a Weight Gap Becomes a Payment Fight
A gap between loaded weight and outturn weight becomes a payment fight when nobody agreed which figure to pay.
Weight gaps turn into payment fights when the buyer subtracts tons from the invoice and the seller insists the loaded weight was the deal. Both sides can hold official-looking paper. The fight is usually about a missing rule, not about a mystery disappearance. Shortage claims as a quantity problem are outlined at https://goodsandgrain.trade/grain-shortage-claims-overview. This note is the money version: who may withhold, how much, and which document should have stopped the argument.
The invoice follows the rule, or it invents one
If the contract pays on loaded weight, the commercial invoice should bill loaded weight, and the buyer should not invent an outturn deduction inside the tolerance. If the contract pays on outturn, billing the loaded figure as final is the seller's version of the same mistake. Quantity clauses that are supposed to say this are explained at https://goodsandgrain.trade/reading-a-quantity-clause. Weight certificates are the evidence, described at https://goodsandgrain.trade/grain-weight-certificates.
A buyer who pays a round number while waiting for outturn should call that payment provisional. A seller who receives it should not call it final. Labels prevent the later accusation that someone shorted a settled bill.
Withholding has a size
Some contracts allow the buyer to hold back a stated percentage until weights are agreed. Holding back the entire cargo value over a small gap is a different, harsher act. If the contract does not allow a holdback, a buyer who simply wires less is taking a remedy the form may not give. You can dispute it. You will dispute it more clearly if your invoice, your certificate, and your notice were on time.
Sellers who refuse to discuss any gap, including one outside the tolerance, train buyers to withhold first and talk later. A tolerance is an agreement to ignore small differences. It is not an agreement to ignore large ones.
Quality and weight get bundled
A payment that is short for weight and also short for a quality claim needs two calculations. Moisture shrink and a missing-ton shortage are different mechanisms. Mixing them lets one side collect twice for water. Keep the quality discount on its own line, with the grade certificate attached. Payment terms that were already loose, such as open account, make bundling easier because the money is still in the buyer's hands. Credit decisions are covered at https://goodsandgrain.trade/checklist-before-buyer-credit.
If you gave an advance, the true-up has to say whether the advance is refunded, credited, or left as a separate debt. Advances are discussed at https://goodsandgrain.trade/advance-payment-in-grain-sales.
Notices, currency, and the partial wire
Send the weight figures inside the notice period. A careful argument that arrives late can be a waived argument. When a partial wire arrives, state in writing how you applied it: to which invoice, in which currency, against which tons. Currency confusion makes a weight fight look like a second dispute. Invoice currency choices are at https://goodsandgrain.trade/invoice-currency-choices.
Do not net a freight claim, a quality claim, and a weight claim in one unexplained short payment. Unexplained nets are how books stay open for a year.
Put the governing weight in the next contract
The repair is a sentence you already wish you had: invoiced weight is this certificate, differences inside this band are ignored, and outside the band the parties do this. Until that sentence exists, treat every large cargo as if the gap will be argued, and keep the raw scale or draft notes. This is commercial practice, not legal advice. If the withheld sum is large, have counsel look at the notice before you accuse anyone of theft.
Frequently asked questions
Can a buyer pay outturn weight if the contract says loaded weight?
Not without a clause that allows it. A unilateral deduction is a dispute, even if their scale is careful.
Should I wait to invoice until the destination weighs the ship?
Only if the contract makes destination weight the bill. Otherwise invoice the governing weight and label any interim bill as provisional.
Is every short payment a weight dispute?
No. Ask for the calculation. Quality, freight, and currency errors get bundled into short wires. Separate the lines.