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To verify a GSTIN before paying an invoice, look up the number in the official GST Portal’s Search Taxpayer service, then compare the returned registration details with the invoice and the supplier records you already trust. If it is an e-invoice, also verify its signed QR code or JSON and check the IRN status. These checks can help expose a mismatch or cancellation, but they do not prove that goods or services were delivered, that payment instructions are genuine, or that you can claim input tax credit.
What should I check before paying a GST invoice?
Use a short, repeatable sequence: verify the supplier’s GSTIN on the government portal, match the result to the invoice and your supplier records, inspect the invoice details, and verify the e-invoice data when applicable. If anything does not line up, pause payment until you have an explanation you can independently confirm. The goal is not to turn a routine invoice into a lengthy investigation; it is to ensure that the entity, document, transaction and payment request are connected in a way your records support.
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- Look up the GSTIN on the GST Portal. Search the supplier’s GSTIN or UIN using the official Search Taxpayer service. The portal allows a search of another taxpayer before login. Use the number copied from the invoice, but check it carefully for transcription errors before submitting the search.
- Check registration status and identity. Review the legal name, trade name, effective registration date, constitution, principal place of business, and any cancellation date shown. Note whether the profile displays an auto-suspended status and its effective date.
- Compare the profile with the invoice and your records. Confirm that the GSTIN, supplier name, address, and state or location information make sense for the entity that issued the invoice. Compare against the order, contract, onboarding records, and prior invoices where available.
- Review the invoice details. Check the supplier identity, invoice number and date, amounts, and tax details against the order and previous invoices. Look for missing or inconsistent particulars, unusual pricing, or a demand for immediate payment.
- Verify e-invoice data when the invoice is an e-invoice. Check the signed QR code or JSON, compare the information with the invoice and your records, and confirm the IRN status. An e-invoice may be cancelled after generation.
- Confirm payment instructions independently. A registration lookup does not establish that the person requesting payment controls the supplier’s bank account. If account details changed, contact the supplier through a previously known channel and resolve the change before sending money.
- Record the result. Keep the GSTIN search result, the invoice copy, any QR or JSON verification output, and the explanation for a discrepancy with the payment approval records. This creates an audit trail showing what was checked and when, without treating the lookup as a guarantee of the transaction.
The result is a practical identity and document check, not a guarantee. Registration status is a point-in-time record, so recheck close to payment when the transaction is material.
How do I check whether a GSTIN is active?
Search the GSTIN on the official GST Portal and inspect the registration profile, including cancellation or auto-suspension information where shown. Do not treat a number printed on an invoice—or a supplier’s screenshot—as a substitute for checking the portal record yourself.
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Open the GST Portal’s Search Taxpayer guide and follow its GSTIN/UIN search instructions. The taxpayer profile can return the GSTIN/UIN, legal and trade names, effective registration date, constitution, principal place of business, cancellation date where applicable, and return-filing details. The guide also describes the display of an auto-suspended status and its effective date when relevant.
Read the status as it appears, rather than assuming that every result means the same thing. A cancellation date or auto-suspension indication is a reason to stop and clarify the supplier’s current ability to issue the invoice. If the result is unclear, ask the supplier to explain it and verify the explanation independently before paying. A record showing a registration does not itself establish that the invoice is genuine or that the supplier performed the work.
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How can I confirm the GSTIN belongs to the supplier on the invoice?
Compare the official profile’s name and business details with the invoice and with supplier information obtained through a trusted relationship. If the legal or trade name, address, or location does not reasonably match, pause and ask for a corrected invoice or a clear explanation.
A GSTIN can look plausible while still being associated with a different business than the one named on the invoice. Compare more than just the number:
- Legal name and trade name: Check whether the invoicing name is consistent with the names shown on the portal. A trading name may differ from a legal name, so a difference is a prompt to verify, not automatic proof of fraud.
- Principal place of business: Compare the portal address with the supplier records and the business location relevant to the transaction. An unexplained mismatch deserves follow-up.
- State or location information: Check that the location information on the profile makes sense for the supplier and invoice. Do not infer that a match on this point validates the rest of the transaction.
- Constitution: Note the constitution shown in the profile and consider whether it is consistent with the contracting party and your onboarding file. If the entity description appears inconsistent, ask the supplier to reconcile it before payment.
- Effective registration date: Compare the date with the timing of the transaction. It can help explain why an older invoice or earlier supplier record uses different tax information, but it does not validate the supply by itself.
- Invoice and order history: Compare the invoice against the purchase order, contract, and prior invoices. Unexpected changes to supplier identity, invoice format, pricing, or payment urgency can justify additional verification.
If a supplier says the discrepancy is an administrative error, request a corrected document or supporting clarification through a known contact channel. Do not let urgency turn an unresolved mismatch into an assumption that the invoice is safe. A familiar logo, email signature or telephone number in the invoice is not an independent confirmation of identity.
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What should I verify on the invoice itself?
Check that the invoice identifies the supplier consistently, contains the relevant particulars, and agrees with the transaction you authorized. The GST Portal lookup and the invoice review are complementary: neither should be treated as a substitute for the other.
At a minimum, compare the supplier identity, invoice number, date, invoice value, amounts, and tax details with your order and, where available, prior invoices. IRIS IRP’s guidance on identifying fake invoices and mandatory invoice fields flags missing or inconsistent details, unusual pricing, GSTIN mismatches, and pressure to pay immediately as warning signs.
Ask whether the invoice describes the goods or services ordered and whether its pricing and tax details are consistent with the agreed transaction. Compare line descriptions, quantities and totals with the purchase order or contract, and check that the tax calculation follows the terms your organization approved. The point is to identify inconsistencies; a GSTIN search cannot determine whether a quantity was delivered or whether a price was commercially agreed.
Review the document for alterations or conflicting versions. An invoice number, date or amount that differs between the PDF, email text and purchase-order system should be resolved before approval. Use the supplier’s established contact details, not only the contact information in a suspicious message, to ask which version is authoritative. If the invoice describes a transaction you did not authorize, or the supplier cannot explain a material inconsistency, do not pay until the issue is resolved.
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For an e-invoice, validate the signed QR code or signed JSON and compare its contents with the invoice copy and your own records. Then check that the IRN remains valid: the invoice can be cancelled after it is generated.
IRIS IRP explains that the signed QR code can contain the supplier GSTIN, recipient GSTIN, invoice number, date, invoice value, HSN code, IRN, and IRP digital signature. Compare each applicable item with the invoice and the transaction records. A QR code that can be scanned is not enough on its own; the signed information and identifiers must agree with what you received. If scanning produces data for a different recipient, document number or value, stop the approval and ask for a corrected document.
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There are two related checks. First, verify that the code or JSON is digitally signed and that the returned fields correspond to the document. Second, check the current status of the IRN, because generation does not make the invoice permanently active. The recipient guidance from IRIS IRP specifically cautions that an e-invoice can be cancelled after generation. Treat a cancelled IRN as an unresolved issue, not as a routine formatting problem.
IRIS IRP’s tools include options to verify signed invoice JSON, verify a QR code, and search GSTIN details. These are useful for e-invoice verification, but use the GST Portal as the primary source for the taxpayer’s registration record rather than treating an IRP tool as a replacement for it. The routes answer different questions: the GST Portal is the authoritative starting point for registration status, while an IRP verification tool helps test signed e-invoice data.
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E-invoice requirements depend on the applicable mandate and the taxpayer or transaction. Do not assume every supplier must issue an IRN. If you are unsure whether an invoice should have one, confirm the requirement for the specific supplier and transaction before treating its absence as proof of wrongdoing. Conversely, the presence of a QR code is not a substitute for checking whether the invoice relates to an authorized purchase.
GST Portal versus IRP tools: which check should I use?
Use the GST Portal first when the question is whether a GSTIN is registered and what profile details are currently displayed. Use an IRP verification route when the question is whether the signed QR code or JSON on an e-invoice matches the document and its identifiers. For a one-off invoice, these official online checks are generally sufficient; for recurring volumes, an accounting or invoicing workflow may help reconcile results, but it should not replace the government registration record.
| Question | Best starting route | What it can show |
|---|---|---|
| Is this GSTIN registered, cancelled or auto-suspended? | GST Portal Search Taxpayer | Registration identity, dates, address and status information displayed by the portal |
| Does the e-invoice data match the document? | IRP signed QR or JSON verification | Signed fields such as GSTINs, invoice number, date, value, HSN, IRN and digital signature |
| Can I locate a received e-invoice? | GST Portal e-Invoice JSON search/download route | Search by IRN or by financial year, document type and document number where applicable |
| Is the IRN still usable? | IRN status check | Whether the generated e-invoice remains active or has been cancelled |
Do not select a commercial tool solely because it presents a more convenient dashboard. Convenience can support a recurring process, but the underlying registration status should still be checked against the GST Portal and the signed invoice data should still be reconciled with the source document.
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What does a GSTIN check not prove?
A matching registration is a useful identity check, but it is not a complete verification of the invoice, supplier, payment request, or tax treatment. In particular, it does not prove delivery, bank-account ownership, or eligibility for input tax credit.
- It does not prove the supply happened. Confirm receipt of goods or completion of services through your normal purchasing and approval records. Match delivery evidence, acceptance or service approval to the invoice independently of the GSTIN result.
- It does not prove payment details are genuine. A valid GSTIN does not show that a bank account belongs to the supplier. Independently confirm changed payment instructions using a contact method you already trust.
- It does not guarantee the invoice is authentic. The invoice could contain inaccurate details or relate to a transaction that was not authorized. Compare it with the order and other records.
- It does not prove the supplier is financially reliable. Registration details are not a creditworthiness assessment and do not confirm that a supplier will complete future work.
- It does not by itself establish ITC entitlement. The GST Portal’s GSTR-2B FAQ cautions that ITC indicated in GSTR-2B remains subject to eligibility and self-assessment. A registration match or a verified invoice alone is not a determination that a particular claim is allowed.
Keep these questions separate in the approval workflow: Is the supplier registered? Is the invoice internally authorized and accurate? Was the supply received? Is the payment account independently confirmed? Is the tax treatment eligible? A “yes” to the first question cannot stand in for the others.
For a tax position specific to your circumstances, obtain appropriate professional advice. Keep the registration check, invoice review, delivery evidence, and tax assessment as distinct parts of the payment and compliance process.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.When should I pause payment?
Pause when the official identity details, invoice, transaction records, or payment request do not agree and the difference is not resolved. In particular, do not rush through an unexplained registration status, a mismatch in supplier identity, unusual pricing, missing or inconsistent invoice details, or pressure to pay immediately.
Ask the supplier to clarify the discrepancy through an established contact channel. If bank details have changed, verify the change separately rather than replying to the same message that requested payment. Resume payment only after the relevant issue is reconciled and your normal approval process is complete.
For a significant transaction, repeat the GSTIN check close to the payment date. The lookup reflects the status available at the time of the search; registration status can change between invoice receipt and payment. If the status changes during review, retain both search dates and ask the supplier to address the change rather than silently replacing the earlier result.
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A practical pre-payment checklist
- Copy the GSTIN or UIN from the invoice and search it yourself on the GST Portal.
- Save or record the displayed legal name, trade name, effective date, constitution, principal place of business and any cancellation or auto-suspension information.
- Compare those details with the invoice, purchase order, contract, onboarding file and a prior invoice.
- Check invoice number, date, value, tax amounts, descriptions and other required particulars for consistency.
- Look for warning signs: a GSTIN mismatch, unexplained identity change, unusual pricing, missing information or immediate-payment pressure.
- If it is an e-invoice, verify the signed QR or JSON and compare GSTINs, invoice number, date, value, HSN, IRN and signature information as applicable.
- Check the current IRN status and use the GST Portal’s search or download route when you need to locate the received e-invoice.
- Confirm any changed bank details through a previously known supplier contact.
- Document unresolved questions and hold payment until they are answered and independently confirmed.
- For a material payment, repeat the status check immediately before release.
This checklist is deliberately layered. Registration confirms an official profile; document review confirms that the invoice is the one your organization authorized; e-invoice verification confirms signed data; and independent payment confirmation addresses a separate fraud risk. Completing one layer does not make the others unnecessary.
Frequently Asked Questions
What if the GST Portal shows that a supplier is auto-suspended?
Do not assume the status is a display error or that the invoice can proceed as usual. Ask the supplier to explain the status and effective date, then verify the position again through the official portal before deciding whether to pay.
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Can a GSTIN lookup tell me which bank account to pay?
No. The taxpayer search is a registration lookup, not confirmation of bank-account ownership. If bank details are new or changed, confirm them through a previously known supplier contact rather than relying on the payment request itself.
Should I reject an invoice if the supplier’s trade name differs from its legal name?
Not automatically: the portal may show both names, and an invoice can use a trade name. Compare the names and other business details, and ask the supplier to explain any difference you cannot reconcile.
Does every GST invoice need an IRN and QR code?
No universal conclusion follows from a GSTIN check. E-invoice requirements depend on the current mandate and the taxpayer or transaction, so confirm applicability for the specific invoice before treating a missing IRN as a problem.
What if the GSTIN is valid but the address on the invoice is different?
Pause and compare the address with the principal place of business, contract and supplier records. A trade or operating location may explain a difference, but obtain a clear explanation or corrected invoice before paying when the mismatch is material.
The Bottom Line
Bottom line: Search the GSTIN on the official GST Portal, compare the profile with the invoice and your trusted supplier records, verify signed QR or JSON and current IRN status for an e-invoice, and independently confirm changed payment instructions. A valid registration is an important starting point—not proof that the supply, bank account or input tax credit is valid.
