Supplier Red Flags — 12-Point Checklist Before Signing the PO

Last reviewed: 2026-05-06

High-risk steel pipe suppliers display predictable warning signs: rates 15-20% below market (sub-spec or refurbished stock), refusal to name the source mill, "MTC will follow" promises, missing GST separation in quotations, no fixed delivery timeline, and vague grade descriptions like "standard quality." The 12-point checklist below systematizes due diligence before issuing a purchase order, protecting buyers from material rejection, project delays, and payment disputes.

Pricing and quotation red flags

1. Rate is 15-20% below market rates: Commodity steel pipe pricing is transparent (check IndiaMART, SteelMint). Extreme underpricing suggests sub-spec chemistry, thinner wall than specified, refurbished/rejected mill stock, or impending default.

2. GST not mentioned separately: Indian B2B wholesalers must quote GST separately (18% for HSN 7306). Missing GST line item suggests unregistered dealer or GST-evasion scheme.

3. Price valid for "today only": While steel prices fluctuate, legitimate suppliers offer 3-7 day validity. Same-day pressure tactics often mask bait-and-switch — the actual dispatch will be a "similar equivalent" at higher price.

Documentation and certification red flags

4. MTC will be "arranged later": The Mill Test Certificate is generated at rolling time and travels with the material. "Later" often means never, or a forged document. Insist on MTC-with-dispatch clause in PO.

5. Mill name not specified or "various mills": Legitimate traders name the source mill (MSL, Jindal, ISMT, etc.) and provide mill tie-up letters on request. "Various" or refusal to name suggests grey-market or cross-border undocumented stock.

6. BIS license number not provided: Mills and major stockists hold BIS licenses. Verify the license number at bis.gov.in. Invalid or no license = non-standard material.

7. No IBR Form III-C availability mentioned: For boiler applications, if the supplier does not immediately confirm IBR capability, they are not IBR-authorized. IBR cannot be added after dispatch.

Specification and quality red flags

8. Vague grade descriptions: "Standard quality," "commercial grade," "regular ISI" are meaningless. Demand explicit grade: IS 1239 YST 240 medium, SA210 Gr A1, etc.

9. Length tolerance not stated: Mills standard is ±50 mm on SRL. A supplier not mentioning tolerance may be planning to deliver short lengths that complicate your fabrication.

10. No hydrotest or NDE mention: Boiler and line pipe quotations should reference hydrotest pressure (bar) or NDE method (UT/RT). Absence suggests untested stock.

Operational and delivery red flags

11. No physical address or warehouse: Verify the supplier has a traceable yard address. PO box, virtual office, or residential address alone are high-risk.

12. Requires 100% advance with no track record: First orders warrant caution — use LC or staged payments (30% advance, 70% against BL). 100% advance to unknown suppliers has high default risk.

Red flag severity and recommended actions

Red flag severity and recommended actions
Red flag	Severity	Recommended action
>15% below market rate	Critical	Reject immediately or demand TPI pre-dispatch
MTC "later" promise	Critical	Make MTC-with-dispatch a PO condition; verify at unloading
No mill name specified	High	Request mill tie-up letter; verify at mill directly
GST not separated	High	Request GST registration certificate; check active status
Vague grade description	High	Insist on explicit grade code in PO
No BIS license provided	Medium	Verify at bis.gov.in; reject if unregistered
No IBR capability	Medium	Source IBR material from alternative supplier
No delivery commitment	Medium	Include liquidated damages clause in PO
100% advance, no track record	Medium	Propose LC or 30/70 staged payment

Specifications at a glance

Specifications
Critical red flags	2 (pricing, MTC)
High severity flags	3 (mill, GST, grade)
Medium severity flags	4 (BIS, IBR, delivery, advance)
BIS verification portal	bis.gov.in → BIS Licensed Manufacturers
GST verification portal	gst.gov.in → Search Taxpayer
Recommended TPI agencies	SGS, Bureau Veritas, Lloyds Register

Frequently asked questions

What should I do if a supplier shows 3+ red flags?

Stop. Do not issue PO. Sourcing from a high-risk supplier to save 5-10% often costs 100% when the material is rejected or the supplier defaults. Use established stockists or mill-direct for critical orders.

How do I verify a mill tie-up letter?

Call the mill's authorized dealer cell directly (numbers on mill website). Provide the stockist name and ask if they are an authorized distributor. Cross-check against the letter provided.

Is a low rate ever legitimate?

Rarely — only for genuine stock clearance (odd sizes, surplus project stock) with full MTC and mill traceability. Verify the heat numbers on the pipes match the MTC, and confirm with the mill that the heat was legitimately sold to this supplier.

What payment terms protect me from default?

For first orders: 30% advance, 70% against BL/waybill. For repeat suppliers with clean history: Net-30. Never 100% advance to an unverified supplier.

Can I trust IndiaMART/TradeIndia ratings?

These reflect transaction volume, not quality verification. Use ratings as a first filter, then apply the 12-point checklist. A 5-star rated supplier can still ship sub-spec material.