Before approving a GST invoice, verify the supplier’s GSTIN or UIN on the official GST Portal. Use Search Taxpayer to confirm that the identifier returns the same legal or trade name shown on the invoice, check the registration status and effective or cancellation date, then open Show Filing Table for the relevant financial year. The lookup is available without signing in.
This check establishes what the GST Portal reports for that identifier. It does not, by itself, prove that the person emailing the invoice controls the registered business or the bank account, and filing history is a due-diligence signal rather than an automatic instruction to pay or withhold every invoice.
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What the GST check can—and cannot—tell you
A GSTIN/UIN search answers three separate questions:
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- Does the profile match the supplier on your invoice? The result can display the legal name, trade name, constitution and principal place of business, allowing you to compare the portal record with the supplier’s documents.
- What filing information is visible for the relevant year? After you select a financial year in Show Filing Table, the portal displays available return-filing details. The supplier may be on a monthly or quarterly filing frequency.
A successful search is not a complete identity or payment-control test. It does not independently establish that the individual communicating with you is authorised by the registered business, that the bank account belongs to that business, or that every tax obligation has been met. Use your normal vendor-onboarding, bank-account verification and approval controls alongside the GST lookup.
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Information to collect before opening the portal
Have the source documents in front of you so that you compare the same transaction details rather than relying on memory or a copied number.
- The GSTIN or UIN printed on the invoice or supplied by the vendor.
- The invoice legal name and any trade name.
- The supplier’s stated business address and other vendor-master details.
- The invoice issue date, tax period or service period, invoice number and taxable transaction description.
- The financial year and return periods relevant to the purchase.
If the number came from an email, independently compare it with the supplier record already held by your organisation. A genuine GSTIN can still be inserted into a fraudulent invoice, so the number itself is only one part of the control.
Step-by-step: verify the GST registration
1. Open Search Taxpayer
Go to the official GST Portal and choose Search Taxpayer. The GST Portal’s taxpayer-search manual states that the lookup works before login as well as after login, so a buyer does not need a GST Portal account merely to perform this public check.
2. Enter the GSTIN or UIN and complete the CAPTCHA
Enter the identifier exactly as it appears on the invoice or vendor documentation. Complete the displayed CAPTCHA and submit the search. If the search returns no result, first check for transcription errors, extra spaces or a digit copied from a different document. Do not silently replace the number with a different identifier supplied in an unrelated email.
3. Read the taxpayer profile, not just the name at the top
Record the fields that the result provides. The public profile can include:
- Legal name.
- Trade name.
- Effective registration date.
- Constitution of the business.
- Principal place of business.
- Current registration status.
- Cancellation date, where applicable.
The status and dates matter because a profile can exist even when the registration is no longer active. A cancellation date is particularly important when the invoice date is near or after that date.
4. Compare the result with the invoice and your supplier master
Match the GSTIN and the legal or trade name against the invoice, purchase order, contract and approved vendor record. Also compare the principal place of business and constitution where those details are relevant to your onboarding controls.
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A trade name may differ from the legal name without indicating a problem, but the discrepancy should be explainable and documented. A different legal entity, an unexpected place of business or a status that does not match the supplier’s explanation is a reason to pause the payment workflow and ask for clarification or a corrected invoice. That pause is a practical accounts-payable control; the portal manual does not prescribe a universal payment-hold procedure.
How to check filing status in Show Filing Table
1. Open the filing table from the taxpayer result
Use Show Filing Table on the taxpayer record. Select the financial year that contains the invoice date or the relevant supply period, then choose search to display the filing details.
2. Check the supplier’s filing frequency
If useful for interpretation, open Show Return Filing Frequency. The official manual describes monthly and quarterly frequencies. A quarterly filer will not have the same pattern of visible periods as a monthly filer, so do not treat the absence of a monthly entry as a missed filing without first checking the stated frequency.
3. Focus on periods relevant to the transaction
Review the periods that correspond to the invoice and the financial year selected. Save the result date and the displayed filing information in the payment file. The portal fields are live and can change; a screenshot or printout from an earlier date is evidence of what was displayed then, not a permanent guarantee of the supplier’s current status.
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4. Preserve an audit trail
For each check, record:
- The GSTIN or UIN searched.
- The date and time of the lookup.
- The legal name and trade name returned.
- The status and any effective or cancellation date shown.
- The financial year selected.
- The filing periods and status displayed.
- The employee or reviewer who performed the check.
- Any clarification requested from the supplier and the response received.
Keep the record with the invoice, purchase order and approval evidence under your organisation’s retention policy. The purpose is to show what was checked when the payment was approved, not to suggest that a historical result remains current forever.
How to interpret registration status and dates
Active-looking profile, matching details
When the portal returns the expected legal or trade name, the GSTIN on the invoice matches, the business details are consistent and the status is appropriate for the transaction date, the identity portion of the check is internally consistent. Continue with your ordinary invoice, goods-receipt or service-acceptance and bank-account controls.
Cancellation date shown
A cancellation date changes the question from “Does this GSTIN exist?” to “What was its status on the invoice date?” Compare the cancellation date and effective registration date with the transaction and invoice dates. If the dates do not support the supplier’s tax treatment, obtain an explanation and route the invoice to the person responsible for tax review before payment.
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Profile does not match the invoice
Stop the automated approval path and ask the supplier to explain whether the invoice used an outdated GSTIN, a branch or another legal entity. Do not edit the GSTIN in your records merely to make the invoice agree with an unrelated portal result. Require a corrected invoice or documented approval for the exception.
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Repeat the search after checking the identifier for a copying error and confirming that you used Search Taxpayer rather than a different portal function. If the result still cannot be reconciled, treat the invoice as unresolved until the supplier provides reliable clarification. Escalate according to your tax and procurement controls rather than assuming that the portal failure proves fraud.
How to read filing history without overinterpreting it
The filing table is useful evidence, but the official instructions do not define a safe number of missed periods, a risk score or a general rule that an apparent gap requires every payment to be rejected. Use the information in context.
- Check frequency first. Monthly and quarterly filing patterns produce different expected period entries.
- Check the relevant year. A filing entry in another financial year does not answer whether the periods connected with your invoice were filed.
- Distinguish an apparent gap from a confirmed default. The public table shows what the portal makes available; it does not explain every administrative, amendment or timing issue behind an entry.
- Escalate unusual patterns. A missing or unexpected period, especially combined with a name or status mismatch, merits supplier clarification and an internal tax review.
Do not turn a filing-history signal into an unsupported promise about input-tax-credit eligibility, payment legality or the supplier’s overall compliance. The portal procedure explains how to view filings; it does not establish a universal payment prohibition.
Why the invoice date matters
GST Portal guidance for GSTR-1 tells the filing taxpayer to check the recipient GSTIN’s validity and upload invoice details only when the recipient was active on the invoice issue date. That guidance reinforces the importance of checking status against the date on the invoice rather than relying only on a current search result.
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What is public and what may require login
The pre-login taxpayer search exposes core profile and filing information described above. The taxpayer-search manual also says that additional information—such as proprietor, director or promoter names, e-way bill history, annual aggregate turnover and tax-payment information—may be available after login.
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Do not represent those additional fields as universally public or assume that every supplier profile will show them to an unauthenticated buyer. If your organisation needs them, use an authorised account and follow the portal’s access and privacy requirements.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.A practical payment-control workflow
Low-friction path for a routine invoice
- Retrieve the GSTIN from the invoice and the approved supplier record.
- Search it on the GST Portal without logging in.
- Compare legal name, trade name, business details and status with the invoice.
- Open Show Filing Table, select the relevant financial year and review the transaction periods.
- Record the lookup date and result, then continue the normal approval process if no discrepancy remains.
Exception path for a mismatch
- Place the invoice in an exception queue rather than changing the vendor master or approving payment.
- Ask the supplier to explain the mismatch and provide a corrected invoice or supporting documentation.
- Re-run the Search Taxpayer check against the identifier on the corrected document.
- Have the designated tax or finance reviewer assess the status and filing-period issue.
- Document the decision and the reason for any approved exception.
Fraud-aware path for a new or changed supplier
- Compare the portal’s legal name and principal place of business with independently obtained onboarding records.
- Verify bank-account changes through your existing out-of-band process, not solely through the invoice email.
- Confirm that the person requesting payment is authorised under your vendor controls.
- Retain the GST lookup alongside the independent identity and bank checks.
This separation matters because the GST Portal confirms information associated with a tax identifier; it does not authenticate the sender of an email or ownership of a bank account.
Common mistakes and how to correct them
Checking only that a result appears
A returned profile is not enough. Read the legal name, trade name, status, dates and business details, then compare them with the invoice and your supplier record.
Ignoring the effective or cancellation date
A current-looking result can be misleading when the invoice relates to an earlier period. Always compare the portal dates with the invoice issue date and relevant supply period.
Calling a quarterly filer “late” because a monthly row is absent
Use Show Return Filing Frequency before judging the pattern. Monthly and quarterly schedules must be interpreted differently.
Treating a filing gap as an automatic non-payment rule
The official procedure does not set a universal threshold or payment prohibition. Escalate the issue, consider the transaction context and obtain tax advice where needed.
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Record when the lookup occurred. The portal is live, and status or filing information can change after the check.
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Relying on a printed reference or invoice book
Paper records can preserve what a supplier stated, but they cannot establish the live registration or filing information shown by the official portal. Use them as supporting documents, not as a substitute for the lookup.
Suggested evidence record for each invoice
A short standard form makes the control repeatable:
- Supplier identifier: GSTIN/UIN copied from the invoice.
- Portal result: legal name, trade name, constitution, principal place of business and status.
- Date fields: effective registration date and cancellation date where shown.
- Invoice comparison: invoice name, date and supplier details, with any difference explained.
- Filing review: financial year, filing frequency and relevant periods displayed.
- Decision: routine approval, supplier clarification or tax-review escalation.
- Evidence: lookup date, saved result or screenshot and reviewer identity.
Keep only the information your organisation needs and handle supplier and personal data according to your internal privacy and retention rules.
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Worked examples of the decision logic
Names differ but the supplier has a documented trade name
The portal returns a legal name while the invoice prominently uses a trade name. If the trade name is also shown in the portal and the GSTIN, address and status align, record the relationship in the vendor file and proceed through the ordinary approval route.
The GSTIN matches but the status date conflicts with the invoice
The identifier is authentic, yet the displayed cancellation or effective date does not cover the invoice date. Do not resolve that conflict by relying on the matching number alone. Obtain a corrected document or a documented tax review before releasing the invoice.
Filing rows look sparse for a quarterly supplier
First confirm the filing frequency. Compare the quarterly periods with the financial year and transaction period; do not impose a monthly expectation on a quarterly filer.
The person requesting payment sends a genuine GSTIN but the bank details changed
The GST lookup can support the tax-identity check, but it does not prove control of the bank account. Apply your independent bank-change verification and authorisation procedures before payment.
Quick Recap
Key limitations to communicate internally
- The public search verifies the portal record associated with the GSTIN/UIN; it does not verify the identity of the person presenting it.
- Public results include core profile and filing information, while some additional fields may require login.
- Filing history is a contextual due-diligence signal, not a government-defined risk score or universal payment rule.
- Portal data can change, so every approval record should include the lookup date.
- Questions about tax treatment, credit eligibility or a disputed invoice should go to the organisation’s qualified GST adviser or tax team.
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