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Enter the GSTIN or UIN in the official GST Portal’s Search Taxpayer tool, then reconcile the returned legal name, trade name, address, registration status, constitution and filing information with the supplier’s invoice and other records. If the supplier claims to be a company or LLP, cross-check it in the Ministry of Corporate Affairs (MCA) records. A matching GSTIN proves that GSTN has a registration record; it does not, by itself, prove that the business is honest, solvent, operating at the stated address or certain to deliver.
What a GSTIN check can prove—and what it cannot
A GSTIN verification answers a narrow but important question: does the Goods and Services Tax Network (GSTN) show a taxpayer registration for the number supplied to you? The official taxpayer profile can also reveal identity and compliance details that expose an invoice or supplier mismatch.
- It can establish: that GSTN has a registration record and the profile data currently displayed for that record, including legal name, trade name, effective registration date, constitution of business, principal place of business, status and, where applicable, cancellation information and return-filing details.
- It can expose: a different legal entity name, an unrelated address, a cancelled or auto-suspended registration, an inconsistent taxpayer type, or invoice details that do not match the portal profile.
- It cannot establish: that the people behind the business are trustworthy, that the premises still exist, that the bank account belongs to the supplier, that goods or services will be delivered, or that the business is financially sound.
That distinction matters because a fraudster can quote a real GSTIN belonging to another business, use a genuine registration while impersonating its owner, or issue a document whose number is valid but whose supplier, bank account or goods are not. Treat GST verification as an identity and consistency check, followed by independent commercial due diligence.
How to verify a GSTIN on the official GST Portal
GSTN’s Search Taxpayer functionality is available without logging in. The official Search Taxpayer manual describes it as a way to view another registered taxpayer’s profile after entering a GSTIN or UIN. Use the portal itself rather than a screenshot, forwarded PDF or an unofficial lookup page.
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- Open Search Taxpayer. On the GST Portal, choose Search Taxpayer, enter the GSTIN or UIN supplied by the business, complete the captcha and submit. Check each character before submitting; one transposed character can return no result or a different taxpayer.
- Save the returned profile. Record the result date and retain a PDF or screenshot for the transaction file. The portal display is the contemporaneous record you reviewed, not a certificate that the supplier can edit.
- Read the identity fields. Note the legal name, trade name, effective registration date and constitution of business. GSTN’s registration guidance says the legal name comes from the PAN database, while the trade name can be different. A different trade name is not automatically suspicious, but the legal name should be explainable and consistent with the contract and payment beneficiary.
- Check the principal place of business. Compare the displayed address with the invoice, quotation, contract, website contact page and any address shown on the registration certificate. A branch, warehouse or service location may explain a difference, but ask the supplier to document it rather than assuming the records refer to the same place.
- Check registration status and dates. Look for the current status, any cancellation date and any auto-suspension or related notice shown by the portal. An apparently active result deserves closer review if the profile records a cancellation, suspension or effective date that predates the invoice.
- Review the filing information. Read the return-filing table and note what the portal makes available for that taxpayer. Filing information is a due-diligence signal, not a promise that a future return will be filed or that every invoice is legitimate.
GSTN’s welcome kit specifically presents taxpayer search as a way to verify authenticity, check handwritten invoices and avoid vendors using fake GSTINs. It is most useful when you compare the result field by field instead of stopping after seeing an “active” label.
Fields to reconcile with the supplier’s documents
Make one review sheet for each supplier or material transaction. The following comparison catches more problems than a simple number lookup.
| Field | Where to compare it | What a mismatch means |
|---|---|---|
| GSTIN or UIN | GST Portal result, invoice, quotation, contract and registration certificate | Stop and recheck the digits. A different number may belong to another registration or another state/location. |
| Legal name | GSTN profile, PAN-linked records where available, contract and bank beneficiary | The invoice may be issued by a different legal person than the one you intend to pay. |
| Trade name | GSTN profile, storefront, website, quotation and purchase order | A trade name may differ from the legal name, but the supplier should be able to explain the relationship. |
| Constitution and taxpayer type | GSTN profile and contract | A claimed company, LLP, partnership or proprietor identity may not match the registered constitution. |
| Effective registration date | GSTN profile and invoice date | An invoice dated before the effective registration date needs a specific explanation and professional tax advice. |
| Principal place of business | GSTN profile, invoice, contract, bank and independently obtained contact details | An unrelated address can indicate impersonation, an unreported location or a documentation error. |
| Status, cancellation and suspension information | Current GSTN result and certificate versions | Do not treat a cancelled or suspended registration as equivalent to an active one for a new transaction. |
| Return-filing details | GSTN taxpayer profile and the supplier’s own explanation | Gaps or unusual entries are warning signals to investigate, not proof of fraud on their own. |
| Tax amounts and description of supply | Invoice, purchase order, delivery record and payment calculation | A valid number does not make incorrect tax, quantity, price or supply details genuine. |
| Bank beneficiary | Invoice, verified bank instruction and contract | A payment request to an unrelated account is a high-risk inconsistency, even when the GSTIN is valid. |
Do not silently “correct” a discrepancy in your accounts. Ask the supplier for an amended invoice or documentary explanation, and preserve the original version. A changed PDF, a new bank account or an urgent request to bypass normal approval should be treated as a fresh verification event.
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A seller may send a GST registration certificate as evidence. If you have authenticated portal access, use the portal’s View/Download Certificates function to inspect the certificate and any amended version. Compare its contents with the live taxpayer profile. A PDF supplied only by the seller is not enough when it conflicts with GSTN, is an older version or has unexplained edits.
The certificate supports the existence and details of the registration; it does not prove that the current caller, email address or bank account is controlled by the registered taxpayer. Confirm the commercial relationship separately.
Check additional GSTN information when it is available
GSTN documentation describes additional fields that may be visible with portal access or in the relevant taxpayer view. Depending on the account and information made available, these can include:
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- proprietor, director or promoter names;
- e-way-bill history;
- annual aggregate turnover;
- the percentage of payments made in cash;
- Aadhaar or e-KYC status; and
- other compliance information displayed by GSTN.
Use these as signals for questions and risk rating. They are not a guarantee of future conduct, delivery, creditworthiness or ownership of a particular bank account. For example, a turnover figure does not prove that the supplier has inventory for your order, and an e-way-bill history does not prove that your proposed shipment will occur.
Search by PAN when you suspect misuse
If the supplier’s GSTIN appears to be misused, use Search taxpayer > Search by PAN on the GST Portal, where that function is available. GSTN documents this view as a way to see GST registrations mapped to a PAN.
- Obtain the PAN from a reliable document or from the person who is entitled to provide it; do not guess or use a PAN found on an unrelated website.
- Run the PAN search and list the GST registrations associated with it.
- Compare the list with the registration the supplier gave you, the claimed state or location and the business identity.
- If the PAN holder says a registration was not obtained by them, use GSTN’s documented reporting path. The complaint is routed to the relevant jurisdictional authority.
A PAN search is especially useful when a real number has been copied into a fake invoice. It does not by itself identify who created the invoice, so retain the document, email headers or message history and payment instructions for the authority or your adviser.
How to tell whether a GST invoice is fake
Review the invoice as a complete transaction record, not just as a tax-number container. Reconcile all of the following:
- GSTIN and legal name;
- trade name and principal address;
- invoice date and registration status on that date;
- description, quantity and actual receipt of the goods or services;
- taxable value, tax rates and tax amounts;
- purchase order, quotation and contract terms;
- supplier bank details and the beneficiary name; and
- the identity of the person who sent the invoice.
Compare the sender’s email, telephone number and bank instructions with contact details obtained independently—for example, from a previously verified contract or a known switchboard—not only from the suspicious invoice. If any material field conflicts, pause payment, ask for confirmation through the independent channel and request a corrected document. Do not click links or call numbers embedded in an unexpected invoice while trying to verify it.
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A GSTIN that belongs to a real business can still appear on a counterfeit invoice. Conversely, a typographical error can be innocent. The distinction comes from the supplier’s ability to explain the inconsistency through verifiable records, not from the number alone.
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Cross-check a company or LLP on the MCA portal
When a supplier says it is an incorporated company or an LLP, search the Ministry of Corporate Affairs records as a second identity check. The MCA Corporate Data Management portal provides company and LLP datasets; its company data is identified as current as of 6 August 2026.
- Use MCA’s Company Master Details or LLP Master Details service.
- Search the claimed legal name. MCA21 Advanced Search supports partial company names and searches by CIN, FCRN, LLPIN or FLLPIN, with country and state filters.
- Compare the MCA legal name, entity type and state with the GST profile, contract and invoice.
- Review available filing information and note the date on which you checked it.
- Investigate differences before signing or paying. Ask whether the GST registration belongs to a subsidiary, branch, proprietor or another entity rather than assuming the names are interchangeable.
The Government Services Portal also lists MCA master-detail viewing, annual e-filing-status checks and complaint services. Use the relevant MCA record for the legal entity being represented, not merely a similarly named result.
Absence from MCA is not conclusive evidence that a business is fake. A sole proprietor or an unincorporated partnership may not appear as a company or LLP. In that case, rely on the GST/PAN identity, contract, address and other appropriate licence or professional-regulator checks instead of rejecting the supplier solely because no MCA company record exists.
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No single database answers whether you should trust a supplier. Use a layered process that matches the risk and value of the transaction.
For a low-value first purchase
- Verify the GSTIN and reconcile the invoice identity.
- Call or email the supplier using independently sourced contact details.
- Use a payment method with a dispute or other protection where practical.
- Start with a small order and confirm delivery before increasing exposure.
For a high-value order or advance payment
- Complete the GST and, where relevant, MCA/PAN checks.
- Confirm the legal contracting party, authority of the signatory, delivery location, taxes, refund terms and governing contract terms.
- Verify bank-account changes through a known contact and require dual approval inside your organisation.
- Consider a site visit, an appropriate licence check or a professional-regulator check for regulated goods and services.
- Use staged payments, escrow or another contractual protection where the risk justifies it.
These controls address different risks. GSTN checks identity and registration data; a contract controls obligations; independent contact verification addresses impersonation; protected payment limits loss; and a site or licence check tests whether the claimed operation exists in the form relevant to your purchase.
Compare two suppliers without overrating GST compliance
When choosing between suppliers, score the evidence consistently rather than selecting the older registration or the taxpayer with the most favourable single indicator.
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| Comparison area | Questions to ask |
|---|---|
| Legal identity and constitution | Do GSTN, the contract, bank beneficiary and (for a company/LLP) MCA identify the same legal party? |
| Registration status and dates | Is the registration status suitable for the transaction, and do the effective and cancellation dates fit the invoice period? |
| Address and contact consistency | Can you independently verify the principal place and reach an authorised representative? |
| Product or service fit | Does the supplier actually describe and document the goods or services you need? |
| Filing and compliance signals | What return-filing and other GSTN information is available, and what does it reasonably show? |
| MCA existence and filing status | For an incorporated entity, does the MCA record match the claimed name, entity type, state and available filings? |
| Payment protection | Can you use staged payment, a protected method, purchase-order controls or contractual remedies? |
| Document quality | Are certificates, invoices, quotations and amendments internally consistent and verifiable? |
Do not rank suppliers solely by a GST compliance indicator or registration age. A long-standing registration can be impersonated, and a newer but correctly identified business may be legitimate. Your decision should reflect the total evidence and the loss you could suffer if the transaction fails.
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The GSTIN returns no result
Re-enter the number, check whether the supplier supplied a GSTIN or a UIN, and verify that you are using the official portal. If it still does not return the expected profile, pause the transaction and ask the supplier for a corrected number and registration evidence. Do not infer that a random online result is authoritative.
The legal name differs from the trade name
This can be normal because GSTN distinguishes the PAN-based legal name from a trade name. Confirm the relationship in the contract and ensure the bank beneficiary and authorised signatory are consistent with the legal entity.
The address differs
Ask whether the invoice relates to a branch, warehouse or another registered place. Require documentary support and update your records; do not overwrite the GSTN address to make the invoice fit.
The status is cancelled or auto-suspended
Check the effective date and any notice shown. Stop a new payment until the supplier explains the status and your tax adviser confirms the treatment of the proposed transaction.
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The seller sends only a certificate PDF
Inspect the authenticated portal certificate and amended versions through View/Download Certificates, then compare them with the live profile. A seller-provided PDF cannot override a conflicting portal record.
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The bank account changes at the last minute
Treat the change as a possible account-takeover or invoice-redirection attempt. Confirm it through a previously known contact, obtain written authority and delay payment until your internal approval process is complete.
The supplier pressures you to pay immediately
Urgency is not proof of fraud, but it is a reason to apply the full checklist rather than skipping it. Use a smaller or protected first transaction if the commercial need is genuine and the evidence remains incomplete.
Keep an auditable verification record
For each material supplier, retain:
- the GSTIN/UIN submitted and the date and time of the portal search;
- the returned legal name, trade name, constitution, address, status, dates and filing details;
- the invoice, quotation, contract and registration-certificate versions reviewed;
- the PAN search result and any complaint reference if misuse was reported;
- the MCA search terms, result and check date for a company or LLP;
- independent contact confirmation and the name of the person who authorised the transaction; and
- the reason for approving, limiting or rejecting the payment.
Record what was true on the review date. Registration and filing information can change, so repeat the check when a supplier changes bank details, issues a materially different invoice, requests a large advance or has a long gap between orders.
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Pause the transaction and involve your tax, legal, procurement or fraud team when:
- the GSTIN maps to a different legal entity or address with no credible explanation;
- the registration is cancelled, suspended or inconsistent with the invoice date;
- the PAN holder denies obtaining the registration;
- the MCA record contradicts a claimed company or LLP identity;
- the bank beneficiary is unrelated to the verified supplier;
- the supplier refuses independent confirmation or corrected documents; or
- the value, advance or delivery risk is too high for an unprotected first transaction.
Escalation is a risk-control decision, not a declaration that the supplier is guilty. Give the supplier a clear list of discrepancies, preserve the original evidence and use the appropriate GSTN or MCA complaint channel when the facts indicate misuse.
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