Bait-and-Switch Quality
Advance samples test excellent, but the bulk shipment is a lower-grade or reject material — the MTC matches the sample, not what was actually shipped.
How the scam works
- 1.Supplier sends a high-quality sample that passes the buyer's testing.
- 2.The order is placed based on that approved sample.
- 3.Bulk material shipped is a lower grade or off-spec reject.
- 4.The certificate references the good sample batch, masking the switch.
Red flags to watch for
- Sample arrives unusually fast and is suspiciously perfect.
- Supplier discourages independent testing of the bulk lot.
- MTC heat number matches the sample but not the shipment.
- Batch markings differ between sample and delivered material.
How to protect yourself
- Test the actual shipped lot, not just the sample — tie payment to it.
- Require retained, sealed samples witnessed by an inspector.
- Specify that the MTC must correspond to the shipped heat numbers.
- Hold a meaningful balance until arrival testing passes.
In depth
In a bait-and-switch, an excellent sample or first order builds confidence, and quality is quietly degraded on later, larger shipments once the buyer has relaxed their guard. The approved sample becomes a reference the bulk material never matches, and because trust has been established, fewer checks are run on exactly the orders where the most money is exposed.
The countermeasure is to keep verification constant rather than letting it decay with familiarity. Retain a sealed reference sample, inspect every order to a standard matched to its value, and tie payment to inspection results on each shipment — not just the first. Fraudsters specifically target the deals that feel smooth, so the discipline of inspecting routinely is what closes the opening.
Related reading
Frequently asked questions
- How does bait-and-switch steel fraud work?
- The supplier sends an excellent sample that passes your testing, you place the order, and the bulk shipment is a lower grade or reject material. The certificate references the good sample batch rather than what was actually shipped.
- How do I protect against it?
- Test the actual shipped lot rather than just the sample, require retained sealed samples witnessed by an inspector, insist the MTC corresponds to the shipped heat numbers, and hold a meaningful balance until arrival testing passes.
Real cases
A full grade lower
Advance samples tested as S355JR. The shipped steel tested a full grade lower at S275JR, with an MTC matching the sample batch rather than the shipment — unsafe for the structural application.
Beams that failed arrival testing
A contractor ordered S355JR beams for a tower. Samples tested well, but shipped beams tested S275JR — unsafe for the design loads. Mandatory arrival testing caught the discrepancy.
Worried this is happening to you?
Run your supplier through the structured verification checklist.