Supplier red flags: the vetting signals that predict trouble.

None of these signals is a conviction on its own — factories are businesses with bad weeks like anyone. But they compound, and a counterparty showing three of them deserves a harder look than a counterparty showing none. The pattern underneath them all: the gap between what's claimed and what can be shown.

Technical evasiveness

Ask a factory a specific question about their own product — a tolerance, a material grade, a process parameter — and a real manufacturer answers fluently, often with more detail than you wanted. A trader passing your question upstream comes back slowly, vaguely, or with an answer to a different question. Neither trading companies nor slow email are sins; the sin is a counterparty pretending to be something they're not, because the pretence will resurface at the worst possible time — mid-production.

The too-easy yes

"Yes" to every specification, every deadline, every target price, without a single clarifying question, is not enthusiasm — it's a counterparty who either hasn't read your pack or doesn't intend to be bound by it. Good factories push back: on a tolerance that's tighter than the product needs, on a date that fights the material lead time. The pushback is the credential. The same logic applies to minimums that collapse too easily and prices far below the rest of the quoting pack — a number nobody else can hit usually has a reason nobody's telling you.

Paper that doesn't line up

Business licences describe scope; a licence about trading when the story is about manufacturing is a conversation worth having. Certifications that are always photographs of frames on walls, never verifiable documents. A factory name that keeps shifting between the licence, the invoice header and the bank account — pay special attention to that last one; payees should match the entity you contracted with. And reluctance to show the line — a live video walkthrough costs a factory nothing but the truth.

Sample brilliance, production silence

A beautiful sample proves a factory can make one. Production proves they can make ten thousand on a Tuesday. Counterparties who shine in sampling then go quiet on process questions — who does what in-house, what's subcontracted, how they control incoming materials — are showing you where the risk lives. Subcontracting isn't a sin either; hidden subcontracting is, because your golden sample was made in a different building than your order will be.

What good looks like

Specific answers with numbers in them. Questions back. A quote that itemises tooling instead of burying it. Comfort with inspections and staged payments — factories confident in their output rarely fear either. Vetting isn't about finding a counterparty with zero flags; it's about knowing which flags you're accepting, and pricing the risk honestly instead of discovering it in a container.