The Supplier Verification Checklist You Need Before Placing Your First Order

You found a supplier. They responded to your RFQ. The quote looks competitive. The samples look good. Everything points to placing your first production order.

This is also where most procurement teams make their most expensive mistake. They place the order based on price and sample quality alone, without verifying whether the supplier can reliably deliver at scale.

A sample proves the supplier can make one part correctly under controlled conditions. It does not prove they can make 500 parts next month, or 5,000 the month after, with the same quality, on time, every time.

Most supplier failures do not happen at the sample stage. They happen at scale.

This guide walks through 15 checks worth verifying before you commit production volume to a new supplier. It is organised into four categories: legal and certifications, production capability, quality systems, and financial and logistics readiness.

Section 1: Legal and certifications

1. Valid GST registration

Confirm the supplier's GSTIN is active. You can verify this on the GST portal. An inactive or cancelled GSTIN creates a risk for input tax credit. While courts have held that genuine transactions should not lose ITC solely due to retrospective cancellation, the burden of proof falls on the buyer and resolving it later can be time-consuming.

2. Udyam registration (if MSME)

Under Section 43B(h) of the Income Tax Act, effective from April 2024, buyers must pay MSME-registered suppliers within 15 days (no written agreement) or 45 days (with written agreement). If the supplier is Udyam-registered and you delay payment beyond this window, you cannot claim the expense as a tax deduction in that financial year. Verify their Udyam status before you agree on payment terms.

Source: Section 43B(h), Finance Act 2023. Effective from Assessment Year 2024-25.

3. ISO or industry specific certifications

ISO 9001 is the baseline for quality management. Depending on your industry, you may need IATF 16949 (automotive), AS9100 (aerospace), ISO 13485 (medical devices), or ISO 22000 (food safety). Ask for the certificate, verify the certificate number with the issuing body, and check the expiry date. Expired certifications are worse than no certification because they suggest the supplier let their quality system lapse.

4. Factory licence and pollution control board consent

Confirm the supplier has a valid factory licence under the Factories Act, 1948, and a Consent to Operate from the State Pollution Control Board. These are required for most formal manufacturing operations. Missing licences can lead to factory shutdowns that disrupt your supply chain.

Section 2: Production capability

5. Machine list and capacity utilisation

Ask for a machine list with make, model, and year of installation. Cross-reference against the tolerances and volumes your requirement demands. A supplier with three CNC machines running at 85% utilisation has very little buffer for your order. Ask what their current capacity utilisation is and how they plan to accommodate your volume.

6. Material sourcing and traceability

Where does the supplier source raw material? Do they have established relationships with material suppliers, or do they buy from the spot market? For critical applications, ask if they can provide material test certificates from the mill. Traceability from raw material to finished part is not a luxury. It is a quality requirement for any application where failure has consequences.

7. Workforce stability

A factory with 50 machines and 15 operators is not running at full capacity regardless of what the capacity sheet says. Ask about workforce size, shift patterns, and attrition rates. High attrition in manufacturing often leads to quality problems because new operators make more errors.

8. Tooling and fixture ownership

If the supplier needs to make tooling or fixtures for your part, clarify who owns them. Industry practice varies. Some suppliers build tooling costs into part pricing. Others charge separately and retain ownership. Get this in writing before production begins. If you need to move to a different supplier later, you need your tooling.

Section 3: Quality systems

9. Inspection equipment and capability

What inspection equipment does the supplier have? For precision manufacturing, a coordinate measuring machine (CMM) is essential. For surface finish, a profilometer. For hardness, a hardness tester calibrated to the relevant standard. Ask when the last calibration was done and by whom. Inspection equipment that has not been calibrated in two years is decoration, not quality control.

10. First Article Inspection (FAI) process

Does the supplier have a formal FAI process? Before production begins, the supplier should produce a small batch, inspect every dimension, and submit a detailed inspection report. This report should include measured values against drawing tolerances for every critical dimension. If the supplier does not have a standard FAI template, that is a red flag.

11. Non-conformance and corrective action process

What happens when a defective part is found? Does the supplier have a documented non-conformance report (NCR) process? Do they investigate root causes, or do they simply replace the part? A supplier without a corrective action process will repeat the same mistake on your next order.

12. Process documentation

Does the supplier document their manufacturing process? Work instructions, setup sheets, control plans. Process documentation ensures that the same part is made the same way every time, regardless of which operator runs the machine. Without documentation, quality depends entirely on who is working that day.

Section 4: Financial and logistics readiness

13. Financial stability indicators

You do not need to audit the supplier's books. But you should check a few basic indicators. If the supplier is a company or LLP, check their filings on the MCA portal. When was their last annual filing? Has any insolvency action been filed against them? A quick check on the Ministry of Corporate Affairs website or a business information provider can surface red flags. Placing a large order with a financially distressed supplier is a risk that shows up in delayed deliveries and quality shortcuts.

14. Payment terms alignment

Discuss payment terms explicitly. Standard terms in Indian manufacturing range from 30 to 60 days. If the supplier insists on 100 percent advance payment for a production order (not prototyping), understand why. It may indicate cash flow constraints or project specific risk, which is relevant to delivery reliability. For MSME suppliers, ensure your payment terms comply with Section 43B(h) timelines.

15. Packaging and logistics capability

This is the most frequently overlooked item. Can the supplier pack parts to survive transit? For precision components, this means individual wrapping, shock-absorbing material, and proper labelling. For export orders, it means compliance with ISPM 15 for wooden packaging. Ask the supplier to show you how they packed the last shipment, not how they will pack yours. What they are already doing is what you will receive.

How to use this checklist

Do not send all 15 points as a questionnaire. Suppliers get too many questionnaires and most go unanswered.

Instead, use this checklist as a framework for a site visit or a structured video call. Cover the legal and certification items first because they are binary. Either the supplier has them or they do not. Then move to production capability, which requires more nuanced conversation. Quality systems and financial readiness come last because they require the most trust and transparency.

For each item, record a status: verified, partially verified, not verified, or not applicable. The downloadable template at the end of this article is structured this way.

The point is not to find a perfect supplier. The point is to know exactly what you are working with before the first order ships.