What it means
Trade is an attractive laundering channel because the volume is enormous, documents pass through many hands, and no single party sees the whole picture. A bank sees an invoice, a shipper sees a container, and a customs officer sees a declaration, but nobody routinely compares the stated price with what the goods are genuinely worth.
The core techniques are simple. Over-invoicing moves value to the exporter, under-invoicing moves value to the importer, multiple invoicing bills the same shipment repeatedly, and phantom shipping bills for goods that never move at all.
Banks and corporates encounter TBML through trade finance, where letters of credit and documentary collections give criminal transactions the appearance of bank endorsement. Compliance teams look for red flags such as prices far outside market ranges, goods that make no commercial sense for the parties, routes through unrelated jurisdictions and rapid amendments to shipping documents.
For an ordinary business, the risk is being used rather than being complicit. A distributor accepting an unusually generous prepayment, or a manufacturer asked to raise an invoice higher than the agreed price with the difference refunded separately, may be sitting inside someone else's laundering scheme.
Controls are mostly practical: verify counterparties, check unit prices against market benchmarks, refuse third-party payments from unrelated entities and escalate anything where documents and physical goods do not line up. Regulators increasingly expect these checks to be documented rather than merely intuitive.
Detection is difficult because each individual document can be perfectly valid. The signal usually comes from combining data, such as comparing declared unit prices with customs statistics or noticing that a counterparty's shipping volumes are wildly out of proportion to its stated size and history.
In practice
Real-world examples.
Example
A bank's trade finance team reviews a letter of credit for scrap metal priced at roughly four times the prevailing benchmark. The analyst blocks the transaction pending price evidence, because a sustained premium of that size has no commercial explanation.
Example
An electronics importer is asked by a new supplier to pay a third-party company in an unrelated country rather than the supplier itself. The finance director refuses, since payments diverging from the contracting party are a standard laundering indicator. He documents the decision so the company can show why the relationship was declined.
Example
A textile exporter is offered a premium to issue invoices at double the agreed price, with the difference wired back to a nominated account. The owner declines and reports the approach, recognising it as a classic over-invoicing scheme that would have made his company a participant.
Think of it
“TBML is the abbreviation for trade-based money laundering-laundering via trade.
Formula
Calculation
Value transferred through mis-invoicing = (Invoiced value - Fair market value of goods). Mis-invoicing ratio = Invoiced value / Fair market value.
An exporter ships 10,000 units of a component whose genuine market price is $20 each, so the fair market value is 10,000 x $20 = $200,000. The invoice is raised at $70 per unit, giving 10,000 x $70 = $700,000. The excess of $700,000 - $200,000 = $500,000 has been moved from the importing country to the exporting country under cover of a legitimate-looking shipment, and the mis-invoicing ratio is $700,000 / $200,000 = 3.5 times, far outside any normal commercial variation.Case study
Seen in the real world.
Marrowgate Trading is a fictional commodity broker invented for this illustrative case. It grew quickly on the back of one client that bought agricultural equipment through it and always paid early, always in full, and never negotiated on price, which the sales team read as an excellent relationship.
A routine compliance review noticed that the equipment was consistently invoiced at around three times catalogue value and that payments arrived from three different corporate entities in two jurisdictions with no visible connection to the buyer. The pattern matched over-invoicing with layered settlement, and Marrowgate filed a report and exited the relationship.
Revenue dropped by about a fifth for two quarters, and the board accepted the hit rather than the regulatory and reputational exposure. The illustrative lesson is that a customer who never questions price is a compliance question, not just a commercial win.
Watch out
Common mistakes.
- Assuming money laundering only happens through banking transfers. Trade documentation is one of the largest laundering channels precisely because it looks so ordinary.
- Treating a clean letter of credit as proof of legitimacy. Banks check documents against terms, not whether the stated price reflects the true value of the goods.
- Judging price plausibility by gut feel. Without a benchmark source and a documented tolerance, a compliance team cannot show why it accepted or rejected a transaction.
Questions
People also ask.
What is the single strongest red flag?
A large, persistent gap between invoiced unit price and independent market price, especially when combined with payments from third parties.
Can a business be liable if it was simply used?
Yes. Regulators expect proportionate due diligence, and failing to spot obvious indicators can bring penalties even where there was no intent.
Does TBML only involve physical goods?
No. Services are harder still to price, so consulting, licensing and freight invoices are used the same way and are often less scrutinised.
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