To verify an MTC, work in this order:
- Match the heat number on the certificate to the number stamped, stencilled or tagged on the steel you received. This costs nothing and catches the most common problem.
- Reconcile the paperwork. Grade, size and quantity should agree across the certificate, your order, the invoice, the packing list and the challan or e-way bill.
- Confirm with the issuing mill when the stakes or doubts are high, using contact details you found yourself, not the ones printed on the certificate.
An MTC is necessary but not sufficient. A genuine certificate can still belong to a different batch, which is why the physical heat-number match matters most. If something does not match, hold the material until it is resolved.
This guide assumes you already know what an MTC is. It is only about catching a fake one, or a real one attached to the wrong steel.
Two Different Questions You Must Answer
Most buyers ask only one question: "Does this paper look real?" You actually need to answer two:
- Is the document genuine? Did the named mill actually issue this certificate?
- Does it belong to my steel? Is the heat number on the paper the heat number on the material in front of you?
A good forgery can pass question one at a glance. A genuine certificate that travels with the wrong material passes question one and fails question two. Verification means answering both, and keeping the evidence.
How to Verify MTC in Six Steps
- Ask for the certificate before payment. Once material is cut or installed, rejecting it becomes much harder and your position weakens.
- Match the heat number to the physical steel. Compare it character for character, including any prefix, suffix or letter, with the stamp, stencil, coil tag or bundle label.
- Reconcile the paperwork. Grade, dimensions, quantity, invoice, challan, e-way bill and packing list should describe the same material. Cutting or split deliveries should be explained by a record, not by a verbal assurance.
- Check who issued it. A mill certificate comes from the producing mill. Check that the certificate names a real mill and identifies the product and heat.
- Confirm with the mill. Send the certificate details to the mill's quality or customer-service team (see below).
- Test when risk or doubt justifies it. Use independent testing if traceability is broken, the supplier is unfamiliar, or something does not add up.
Heat Number Check: What to Look For on the Steel
The heat number is the link between the paper and the metal. Where it appears depends on the product form:
- Plates and bars: often stamped or marked on the surface, edge or end.
- Coils and sheets: commonly on a tag or label attached to the coil or bundle.
- Pipes and tubes: frequently stencilled or printed along the body, or on bundle tags.
- Packaging: bundle labels and packing lists can carry the heat reference too.
Read the marking line on the certificate. Some mill certificates state what the product is marked with, for example a mill logo, manufacturer name, grade or heat number. If your certificate says that, it tells you exactly what to look for on the steel. A certificate that describes markings your steel does not carry is describing something different.
Take a clear photo of the marking next to the certificate. Treat any unexplained difference, even one digit or suffix, as a discrepancy until the supplier or mill explains how the identifiers relate.
What about cut pieces with no marking? Offcuts and cut-to-size pieces often lose their markings. That is not automatically fraud, but it removes the direct marking check. Ask the seller for photos of the original marked material and a written note linking the parent heat to the pieces you received. This is weaker evidence than a direct physical match.
Red Flags That May Point to a Fake MTC
A red flag is a reason to hold and investigate, not proof of fraud. Genuine certificates can be badly scanned, and genuine mix-ups happen.
| Signal | Why it matters | What to do next |
|---|---|---|
| Heat number on the paper differs from the steel | The certificate does not establish what you received | Hold the material and ask the supplier in writing |
| The mill says it did not issue the document | The strongest evidence of a problem | Stop, keep records, take advice |
| A trader's own declaration with no mill certificate behind it | A seller's statement, not a mill record | Ask for the original mill certificate |
| The same certificate covers material that cannot be reconciled with its heats or quantities | Possible reuse across unrelated deliveries | Ask for the allocation or split-delivery record |
| Grade, size or quantity conflicts with invoice or packing list | Paper and delivery do not describe the same material | Ask for a corrected document |
| Chemistry that does not fit the claimed grade (for example, no molybdenum on a "316" certificate) | Inconsistent with the grade claimed | Ask the mill to confirm |
| Altered fonts, logos or stamps, or unexplained edits | Possible tampering, but also possible poor scanning | Ask for the original file |
| Supplier resists mill confirmation or pushes you to accept quickly | Reluctance to be checked is itself information | Slow down and verify |
"Too perfect" values, such as round numbers or identical results across different heats, deserve a second look. They do not prove forgery, because some reporting is legitimately rounded. There is no reliable universal threshold, so compare against the grade limits and ask the mill to confirm.
What If There Is No MTC at All?
For small quantities bought from a local market or cut from stock, there is often no certificate. "MTC nahi hai" is a common answer, and it is not automatically dishonest. It does mean you have no documentary evidence of grade.
When no MTC is available:
- Ask whether the seller can obtain the original mill certificate for the parent coil or sheet, even if your piece carries no heat number.
- Get the claimed grade written on the invoice or challan. A written grade on a GST invoice is a statement you can hold the seller to. A verbal assurance is not.
- Treat physical testing as your main evidence rather than a backup. A quick spot screen matters more here than anywhere else.
- For anything that will hold water, touch food, sit outdoors or carry load, consider lab confirmation or buy from a source that can supply traceable material.
No certificate means no traceability. You can still decide sensibly, but you must base it on the metal rather than the paper.
How to Contact the Mill
Find the mill's official website yourself. Do not rely on the phone number, email or QR link printed on the certificate you are trying to verify, because a forged document can carry forged contact details.
Write to the mill's quality or customer-service team and include the certificate number, heat number, grade, product form and size, supplier name or invoice reference, a copy of the certificate, and a clear photo of the marking on the steel. Then ask:
Did your organisation issue this certificate? Do the heat number, grade and results match your records? Is any alteration or reissue apparent?
Be realistic. A response is not guaranteed. Access and disclosure policies vary, and some mills may confirm only that a certificate or heat exists, without sharing who bought it. If the mill does not respond, that does not prove the certificate is fake. Ask your supplier to obtain written confirmation, and treat stalling as information.
Can a QR Code or Online Portal Prove an MTC Is Genuine?
Not on its own. A QR code may contain a link or other encoded data, and one copied from a genuine certificate can be printed on a fake. It helps only when the verification service is confirmed through the mill's official channels and the record it returns matches your certificate.
When you scan one, check that the web address belongs to the mill, that the record shows the same certificate number and heat number, and that it matches the marking on the steel.
Do not assume every mill offers online verification. Many publish no public portal, and in that case a direct email to the mill's quality team is the realistic route. Where verification platforms exist, they are sometimes set up in response to misuse: in 2024 a Chinese stainless manufacturer reportedly launched an online verification platform after finding its BIS certificate was being misused on exports to India (see the customs section below). A portal that validates only a certificate number still does not prove the steel in your hands belongs to it.
A Genuine MTC Attached to the Wrong Steel
This is the most overlooked problem. The certificate can be real, and the steel can still be from another heat. It happens when:
- one genuine certificate is reused for later sales of different material;
- a heat is split among many buyers and the markings are lost on cutting;
- two heats are stored together and the wrong certificate is attached;
- one certificate is sent with a delivery containing several heats.
Reusing a mill certificate for partial deliveries is not automatically suspicious. The concern is whether each delivery can be reconciled with the heats and products the certificate covers, through clear allocation and traceability records. Authorised distributors and cut-to-size processors often send a covering document that attaches or references the original mill certificate, and that is legitimate.
Also note that the person selling to you may not know. A trader can pass on a certificate received from upstream without ever checking it. That does not excuse a wrong-grade delivery, but it is a good reason to start with a neutral written question before making accusations. A mismatch can come from a paperwork error as well as from substitution or fraud.
What to Do If the Heat Number Does Not Match
- Stop and quarantine. Do not cut, weld, install or resell the material, and keep it separate from accepted stock.
- Photograph everything: the marking, tag, certificate, invoice, challan and the load.
- Ask the supplier in writing whether the certificate is wrong, the material is mislabelled, or the wrong batch was delivered.
- Ask for the correct certificate for the heat actually on the steel. A replacement certificate counts only if its authenticity and link to your material can be confirmed.
- Confirm with the mill using independently found contact details.
- Escalate if unresolved: independent testing, return, replacement or rejection, using the remedies your contract provides. Take advice before withholding a disputed payment.
- Keep the records. Original files, messages, photos and test reports matter if a dispute follows.
What Indian Customs Records Show About Fake Certificates
One published example: a Mundra Customs Order-in-Original dated 4 March 2025 concerns stainless steel coils imported in September 2024 and declared as grade 430. It records that the overseas manufacturer's authorised representative said the accompanying certificate had not been issued by the BIS licence holder named on it, and that Customs examined the goods. The importer argued that the supplier had sent the wrong goods and that it had relied on the supplied documents in good faith. The authority recorded a contrary finding on the certificates. This is an administrative adjudication order. We have not verified whether it was appealed or what the final outcome was.
Separately, in September 2024 a Chinese stainless manufacturer reportedly alerted Indian Customs that its BIS certificate was being misused to ship steel it had not been certified for. Indian media reported the episode, quoting the trade think tank GTRI. That is a manufacturer's complaint as reported, not a court finding.
What a buyer can take from these records:
- The manufacturer's own confirmation was central. That is the same check this guide recommends.
- A certificate can look real and still not be recognised by the manufacturer it names.
- These matters concern importers, not everyday domestic buyers, but imported steel eventually reaches the wider market.
- Customs orders and media reports record allegations, complaints and findings in specific proceedings. They do not tell us how common fake MTCs are. We did not find a reliable published fraud rate, and we do not claim one.
Lab Tests and Spot Tests: Where They Fit
Paper checks and material checks catch different problems. Document checks catch forged paper. Material checks catch the right paper on the wrong metal.
- NABL-accredited lab: can test a sample's chemistry and mechanical properties. Check on the NABL website that the lab's accreditation scope covers the test you need. A lab tests the sample, so it does not prove the mill issued the certificate.
- Handheld XRF: useful for screening alloying elements, but it cannot measure carbon, so it cannot tell 304 from 304L or 316 from 316L. Optical emission or full laboratory analysis is needed when carbon is in dispute.
- Magnet: a rough first screen only. Cold-worked 304 can be slightly magnetic, and duplex grades are magnetic despite good corrosion resistance.
- Spark test: helps separate stainless from carbon steel. It cannot tell 304 from 316.
We did not find a universal percentage of an order that buyers should re-test. Follow any inspection plan in your contract. Otherwise, check the paperwork and identification of every separately marked batch, and test more when the value, the supplier, the end use or the number of heats raises the risk.
Where a MOLY Spot Screen Fits, and Its Limits
Full disclosure: SHILPIND makes MOLY, so read this section with that in mind. A quick spot test is a useful extra screen when you cannot afford lab work on every delivery. It cannot authenticate a certificate or link steel to a heat number. It only tells you whether the steel's behaviour is consistent with what the paper claims.
Before you test: follow the safety instructions on the MOLY box and label, which take precedence over this article. In general, avoid skin and eye contact and rinse with plenty of water if it happens, keep the kit away from children, and do not let the battery short-circuit. If you test a food-contact surface, thoroughly clean and rinse the tested spot before any food use.
How to verify with MOLY, the stainless steel testing liquid from SHILPIND:
- Clean the surface. Oil, rust or coatings can interfere with the result.
- Apply one drop.
- Connect the 9V battery via the connector.
- Touch only the connector's negative (–) prong to the drop (not both prongs). This triggers the reaction.
- Read the result. The full result is visible within 30 seconds.
BLACK and stays black = SS 202. RED and fades quickly = SS 304. RED and stays red = consistent with SS 316.
Treat this as a screen, not a certificate. A red that stays means molybdenum is present, which is consistent with 316 but not proof, because other molybdenum-containing grades such as 317/317L, 904L and some duplex grades can react in a similar way. A red that fades means molybdenum was not detected, and the test cannot distinguish 304 from 304L or 316 from 316L. If a certificate says 316 and the drop does not hold red, stop and investigate before accepting the material. If the result looks unclear, repeat on a freshly cleaned spot. Use the result alongside the certificate and heat-number checks, never instead of them or of a lab.
Quick MTC Verification Checklist
- Certificate requested before payment
- Heat number matches the steel, tag or bundle label, with photos taken
- Marking line on the certificate (if present) matches what the steel carries
- Grade, size and quantity match order, invoice, challan or e-way bill and packing list
- Every delivered heat is covered by the right mill record and a clear allocation
- Mill contacted through its official website when stakes or doubts are high
- Quick MOLY screen on pieces, especially unmarked ones
- Everything filed by heat number
For wider supplier-side checks, see our local vendor fraud verification checklist, the bulk order testing workflow for fabricators and dealers and our guide to scrap dealer vendor fraud. How to read an MTC and the difference between certificate types are covered in separate guides.
This article is general information, not legal advice. For disputes, take advice based on your contract and evidence.
Frequently Asked Questions
How can I verify an MTC is genuine, not forged? Use several independent checks, not just how the PDF looks. Match the heat number to the physical steel, reconcile grade, size and quantity with your invoice and packing list, and confirm with the mill through contact details you found yourself. No single stamp, logo or QR code proves authenticity.
What are common red flags of a fake MTC? The main ones are a heat number that does not match the steel, a mill that says it did not issue the document, a trader's declaration with no mill certificate behind it, and one certificate covering material that cannot be reconciled. Conflicting grade, size or quantity details and a supplier who resists verification are also warnings. A red flag means investigate, not that you have been cheated.
Does the heat number need to match the physical marking? Yes. The heat number on the certificate should match the number stamped, stencilled or tagged on the delivered material, or on its bundle label. If it does not, the certificate does not establish what you received. For cut pieces, ask for a documented link to the original heat.
What should I do if the heat number doesn't match? Stop using the material, keep it separate, and photograph the marking and the certificate. Ask the supplier in writing for a correct certificate or explanation, confirm with the mill, and test or reject if it cannot be resolved. A replacement certificate counts only if its authenticity and link to your steel are confirmed.
How do I contact the mill directly to confirm a certificate? Find the mill's official website yourself and use its quality or customer-service contact, not details printed on the certificate. Send the certificate number, heat number, grade, size, supplier name and a photo of the marking, and ask whether the mill issued the document and whether the details match its records.
Can a buyer independently verify an MTC with the manufacturer? Often yes, but access is not guaranteed. Some mills offer a verification route and others will reply by email, while some may confirm only limited details or not respond to buyers they do not supply. Ask your supplier to obtain written confirmation if the mill will not engage with you directly.
Why do steel traders sometimes fake mill certificates? Where it happens, the aim is to pass lower-grade or non-conforming steel as a higher grade, or to satisfy a buyer's paperwork demand without a genuine mill record. It does not mean traders in general do this. Some sellers also pass on bad certificates from upstream without realising.
What real cases exist of fake MTCs being caught in India? A Mundra Customs order dated 4 March 2025 records certificates on imported stainless coils that the named manufacturer's representative said were not issued by it, and the authority recorded a finding that they were fake. It is an administrative order, and we have not verified the appeal outcome. We found no verified Indian case specifically about a domestic buyer.
Can a supplier be genuinely unaware the certificate passed on was fake? Yes. A trader may forward a certificate received from an upstream seller without verifying it. That does not excuse wrong-grade material, but it is why you should ask a neutral written question first and build a record before accusing anyone.
Does a QR code/UID make an MTC harder to forge? It can, but only if the verification service is confirmed through the mill's official channels and the record it returns matches the certificate and heat number. A QR code can be copied from a genuine certificate onto a fake one, so scanning is not proof by itself.
How do I verify a mill's MTC through an online portal? First check whether that mill offers one on its official website. Many mills publish no public portal, so do not assume one exists. If a portal returns a record, confirm that the certificate number and heat number match your documents and the steel, and email the mill's quality team if there is no portal.
How do I resolve a discrepancy between an MTC and an independent lab test? First confirm the lab sampled the same heat and used a method that can measure what is in dispute, since handheld XRF cannot measure carbon. Then ask the lab to confirm sample identification and method, share the result with your supplier in writing, ask the mill to review it, and retest if needed.
Can an MTC be legitimate but still not match the delivered batch? Yes. A genuine certificate can be reused, attached to the wrong delivery, or separated from cut pieces. That is why you must match the heat number to the physical steel, not rely on the document alone.
What's the legal recourse if a supplier gave a fake certificate? Depending on your purchase terms and evidence, options may include rejection, replacement, a refund, or a formal complaint if deliberate deception is suspected. We are not a law firm, so keep your records and take legal advice before choosing a route.
How does customs/BIS treat fraudulent import declarations? Published Gujarat Customs records show that suspected fake certificates and misdeclared grades can lead to examination, show-cause notices, adjudication and penalties against importers, depending on the facts. A BIS licence check is a separate matter and does not authenticate a particular batch's MTC.
Is checking the MTC enough, or should I always physically test too? Checking the MTC is not enough. It must be matched to the physical heat number, and testing adds protection when the stakes, the supplier or the paperwork raise doubt. You do not have to lab-test every order, but you should not rely on paper alone for important material.
What percentage of an order should be physically re-verified? We did not find a published standard percentage that applies to buyers like you, so treat any specific figure with caution. Follow any inspection plan in your contract, check the paperwork and identification of every separate batch, and test more as value, supplier risk and end use increase. Checking one piece does not validate other heats in the order.
How do I check if an MTC belongs to the exact batch delivered? Find the heat number on the steel, tag or bundle label, and match it to the certificate. Then confirm grade, size and quantity against your invoice, challan or e-way bill and packing list. If the material was cut or repacked, ask for a written mapping from the original heat to the pieces delivered.
Can NABL-accredited labs help verify an MTC's claims? Yes, for the tests covered by the lab's accreditation scope. A lab can test a sample from your delivery and show whether it is consistent with the claimed grade. It tests the metal, though, and does not prove that the mill issued the certificate.
What should I do if MTC values look "too perfect"? Treat it as a reason to investigate, not proof of fraud. Compare the values with the grade limits, check for identical results across different heats, and ask the mill to confirm. If doubt remains, arrange independent testing.
How is heat-number traceability maintained across the supply chain? The mill assigns a heat number, marks the material and issues the certificate for that heat. Each seller down the chain is expected to carry that identity on tags, labels and paperwork. It can break during cutting, repacking and mixed storage unless the identification is preserved.
Does a trader declaration carry the same weight as a mill-backed certificate? No. A trader declaration is the seller's own statement, while a mill-backed certificate is traceable to the producing mill and a specific heat. A covering document that attaches the original mill certificate is fine, but a declaration on its own does not show what the mill tested.
What happened in the 2024 Indian customs fake-BIS-declaration case? The closest verified matter is this: in September 2024 a Chinese stainless manufacturer reportedly alerted Indian Customs that its BIS certificate was being misused to ship steel it had not been certified for, as reported by Indian media citing GTRI. Separately, Gujarat Customs has published orders on stainless coils declared as grade 430 with certificates the manufacturer's representative said it did not issue. These are complaints and administrative proceedings, not criminal convictions.
Can I be liable for using fraudulent material even unknowingly? It depends on the facts, your contract and the use. Unknowingly using bad material is different from knowingly using false documents, but you may still face rework, rejection or disputes with your own customer. Keep your verification records and take legal advice if the material has been installed or resold.
What's the fastest practical sanity-check for a small buyer without lab access? Match the heat number to the steel, then confirm grade, size and quantity against your invoice and challan. Photograph everything, and add a quick MOLY screen as an extra check: a positive red result is consistent with 316 but also occurs with 317/317L, 904L and some duplex grades. If anything is off, hold the material and escalate.
What evidence should I preserve if I suspect a fake MTC? Keep the original certificate file, invoice, challan, packing list, supplier messages, photos of all markings and any mill reply or test report. Note the date and what each sample was. This record is what makes a later claim or complaint possible.
What if the mill does not respond or refuses to confirm the MTC? A lack of reply does not prove the certificate is fake. Follow up through the official channel, ask your supplier for written mill confirmation, and keep the material on hold if the doubt affects acceptance. If it stays unresolved, use independent testing or your rejection options.
Verify Before You Trust
A certificate tells you what a mill recorded about one heat. The heat-number match tells you whether it is about your steel, and the mill and a lab help you confirm the rest. Match the physical heat, reconcile the paperwork, hold anything that does not add up, and use a quick spot test as an extra screen. To check stainless grade yourself, use the MOLY stainless steel testing liquid kit.
Sources: Mundra Customs Order-in-Original, 4 March 2025 (Gujarat Customs) · Asian Age report on BIS certificate misuse, 2025 · NABL, accredited laboratory search
