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1Clear out junk files and repair common Windows errors2Scan for outdated or missing drivers - takes under a minute3Repair Windows errors before they cause bigger problemsVerify a GST notice first through the GSTN Verify RFN service, using the Reference Number (RFN) printed on the notice. The service works before login and, after login, through Dashboard → Services → User Services → Verify RFN. Compare the portal’s RFN-generation date, document date, module, communication type and issuing office with the document. Then sign in at gst.gov.in and check Services → User Services → Additional Notices & Orders for the notice and any DRC-01 or DRC-07 summary. For a communication issued by the Central Board of Indirect Taxes and Customs (CBIC), verify its Document Identification Number (DIN) when applicable.
A successful RFN or DIN match confirms that the communication record exists and identifies its source; it does not prove that the tax calculation, legal interpretation or demand is correct.
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What you need before checking
Read the notice itself, but do not click links or call numbers supplied in an unexpected email. Record the identifying details so you can compare them with the government portal:
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- RFN, if one is printed on the GST notice or order.
- DIN, if the communication is a CBIC document that should carry one.
- Notice or order date and the tax period involved.
- Issuing office and officer details.
- GSTIN, form number, amount demanded and reply deadline.
- The email address, telephone numbers and payment instructions shown in the document.
Open a new browser window and type gst.gov.in or cbic-gst.gov.in yourself. Treat a link in an email, SMS or PDF as untrusted until the portal confirms the record. Check the spelling of the domain carefully; a page that copies the GST logo is not evidence that it is operated by GSTN or CBIC.
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Verify the RFN without logging in
1. Open the official service
Go directly to https://services.gst.gov.in/services/verifyRfn. GSTN’s 25 September 2024 advisory says communications generated through the GST common portal can be verified pre-login from this service. Pre-login access is useful when you are checking an unexpected email or when the notice concerns a person who cannot immediately sign in.
2. Enter the notice’s RFN
Type the RFN exactly as printed. Check characters such as zero and the letter O, and avoid adding spaces or punctuation. Submit the query and wait for the result displayed by the GST portal. Do not use a search-engine advertisement or a shortened URL to reach the service.
3. Compare every returned field
CBIC Circular No. 249/06/2025-GST, dated 9 June 2025, states that verification displays these details:
| Portal field | What to compare on the notice | Why a difference matters |
|---|---|---|
| Date of RFN generation | The RFN date or generation information shown in the document | An unexplained date can indicate an altered, misidentified or unrelated document. |
| Date of issuing the document | The notice or order date | A different date may change the response period or show that the PDF is not the portal record. |
| Module | The GST module or workflow named in the notice | A module mismatch suggests that the RFN belongs to another communication. |
| Type of communication | Notice, order or other communication type | The record should describe the same type of document you received. |
| Name of the office issuing the document | The office printed in the heading or signature block | A different office requires clarification before you respond or pay. |
Do not treat a result that merely says an RFN exists as a complete match. The identifier, dates, module, communication type and issuing office should all align. Save a screenshot or PDF print of the result with the original notice for your records. Note the date and time of the lookup because a later dispute may require you to show what the portal displayed.
Confirm the notice after signing in
Use the post-login Verify RFN path
Sign in by typing gst.gov.in into the browser. GSTN documents the post-login route as Dashboard → Services → User Services → Verify RFN. Enter the RFN again and compare the returned metadata with the document. Use your own credentials and never allow an unknown caller to control your screen while you log in.
Check Additional Notices & Orders
From the logged-in dashboard, open Services → User Services → Additional Notices & Orders. Look for the notice, order or communication associated with your GSTIN. GSTN’s functionality documentation says summaries such as Form GST DRC-01 are made available in this area. When an order has been issued, look for the corresponding Form GST DRC-07 summary where applicable.
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The logged-in record is an important second check because it connects the communication to your taxpayer account. Compare the tax period, form, amount, issue date and response deadline with the PDF or email. Download the portal copy rather than relying solely on an attachment forwarded by someone else. A missing record does not by itself prove fraud: the document may belong to a different workflow, the portal may be temporarily unavailable, or the details may have been copied incorrectly. Treat the discrepancy as unresolved and contact GSTN before taking financial action.
RFN and DIN: which identifier applies?
| Identifier | Where it is used | How to verify it |
|---|---|---|
| RFN (Reference Number) | Documents and summaries generated through the GST common portal | Use the GSTN Verify RFN service and compare its returned metadata. |
| DIN (Document Identification Number) | CBIC communications, including emails, when the DIN requirement applies | Use the official CBIC DIN-verification facility and compare the communication details. |
CBIC Circular No. 128/47/2019-GST, dated 23 December 2019, directed electronic generation and quoting of a DIN for communications, including emails, sent by CBIC offices. CBIC Circular No. 249/06/2025-GST clarifies that documents and summaries generated through the GST common portal already carry an RFN; adding a second DIN to those portal-generated documents is unnecessary. Therefore, do not reject a portal-generated notice merely because it has no separate DIN, and do not assume that every message using the word “GST” is verified until its applicable identifier matches.
When the sender claims to be a state GST authority rather than CBIC, the applicable portal workflow may differ. The RFN check remains the first step for a communication generated through the GST common portal. If the document identifies neither a usable RFN nor an applicable DIN, ask the issuing office or GSTN to explain the authentication route before sharing information or paying.
Is a GST notice valid without a visible digital signature?
A PDF without a visible signature image is not automatically fake. GSTN describes portal documents as generated through an officer login authenticated with a digital signature. The reliable test is whether the RFN and logged-in record identify the same document, office, dates and communication type, not whether a scanned signature appears on the page.
If the document contains a signature block, officer name, designation or certificate, preserve it exactly as received. Do not edit, resave or “repair” the PDF before keeping an original copy; metadata and formatting can be useful when the document is examined by GSTN or a tax professional. A digitally generated document may also have a separate electronic signature panel that is not visible in a simple preview, so do not infer authenticity from the appearance of the first page.
Check what the notice actually demands
Authentication and legal correctness are separate questions. After the identifier and portal record match, review the substance before deciding whether to pay or reply.
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Tax period and legal provision
Confirm that the period in the notice matches your returns, books and invoices. Read the section, rule, notification or form cited. A genuine notice can still contain an incorrect classification, duplicated liability or calculation error. Check whether the notice concerns the correct GSTIN, registration status and place of supply.
Amount and computation
Recalculate the tax, interest and penalty from the underlying returns and records. Check whether input-tax credit, amendments, payments or earlier correspondence have been taken into account. Keep a working paper showing each figure and the source return or invoice. Reconcile the demand with electronic liability and credit ledgers and with challans already paid.
Reply deadline
Identify the exact deadline and the prescribed response channel in the authenticated notice. Calendar the date immediately, allowing time to collect records and obtain advice. Note whether a personal hearing, written reply or payment through a particular form is required. Never assume that verifying an RFN extends the deadline or pauses recovery action.
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Use only the payment and filing functions reached from the official GST portal after you sign in. Do not enter bank details, card information, passwords or one-time passwords into a page opened from an email or an unfamiliar domain. Government verification does not require payment to a personal bank account, wallet, QR code or intermediary.
How to compare the available checks
The safest process uses more than one signal. The official portal has the highest authority; an email link has the lowest. RFN is the relevant identifier for a common-portal document, while DIN is the relevant identifier for a CBIC communication when the DIN requirement applies. Pre-login Verify RFN is quick and useful for an initial check; post-login Verify RFN and Additional Notices & Orders connect the record to your GSTIN. The metadata returned by the portal—dates, module, communication type and office—lets you test whether the exact file matches, rather than merely confirming that a number exists.
If two checks disagree, do not average them or choose the more convenient result. Preserve both results, record the discrepancy and seek confirmation from GSTN or a qualified adviser. A genuine notice can be time-sensitive even while its authenticity is being clarified, so obtain advice on protecting the reply deadline without acknowledging an unverified demand.
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What to do when Verify RFN shows no record
A “no record” result, an invalid RFN message or a metadata mismatch means the notice has not been authenticated. Follow this sequence:
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- Re-enter the RFN manually, checking every character and removing accidental spaces.
- Try the official service again later if the portal reports an outage or fails to load, and record the time and error message.
- Sign in at gst.gov.in and inspect Services → User Services → Additional Notices & Orders for the GSTIN.
- Check whether the document should have a DIN because it is a CBIC communication, then verify that DIN through the applicable official CBIC service.
- Preserve the original email with full headers if available, the untouched PDF, screenshots of the portal result and a timeline of your checks.
- Do not click payment links, install software, disclose an OTP or send identity documents in response to the unverified message.
- Contact the GSTN helpdesk at 1800-103-4786 or use https://selfservice.gstsystem.in. Provide the RFN or DIN, GSTIN, dates, screenshots and the exact discrepancy.
- If the amount or legal basis is disputed, consult a qualified GST practitioner, chartered accountant or tax lawyer while the response deadline is still open.
When contacting support, describe the exact path you used, the browser date and time, and whether the failure occurred before or after login. Do not email passwords, OTPs or complete identity documents unless an authenticated authority specifically requires them through a secure channel. If you already clicked a suspicious link, change affected passwords, alert your bank if payment information was entered and preserve device and email evidence.
How to distinguish a genuine record from a fraudulent message
| Check | Strong evidence | Warning sign |
|---|---|---|
| Identifier | RFN or applicable DIN returns a matching official record. | The number is absent, invalid or belongs to different metadata. |
| Issuing office | The portal’s office name matches the notice. | The notice names an office that the portal does not show. |
| Dates | RFN-generation and document dates agree with the PDF. | Dates conflict or appear changed after receipt. |
| Logged-in account | The communication or related summary appears under your GSTIN. | Nothing appears in Additional Notices & Orders after a reasonable recheck. |
| Action requested | Reply and payment are completed through the signed-in official portal. | The sender demands immediate payment through a private link, QR code or personal account. |
| Security request | The portal does not ask you to disclose an OTP to another person. | The sender asks for an OTP, password, remote-access app or executable file. |
One warning sign is not conclusive on its own, but an identifier mismatch or an unverified payment demand should stop the transaction until GSTN or a professional confirms the position. Urgency, threats of arrest and demands for secrecy are social-engineering tactics, not substitutes for a portal record.
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Create one folder for the matter and retain:
- The original email in its native format, including headers when possible.
- The original PDF and a read-only copy of any printed notice.
- A screenshot or printout of the Verify RFN result showing the returned fields.
- A screenshot of the logged-in Additional Notices & Orders entry and any DRC-01 or DRC-07 summary.
- Your notes recording the date, time, browser and exact error message for a failed lookup.
- Return filings, challans, invoices and calculations relevant to the tax period.
- Copies of replies, acknowledgements and helpdesk tickets.
Keep these records separate from edited working copies. They establish what you received, what the official portal displayed and when you took each step. Use a clear filename with the GSTIN, document date and RFN, but do not rename or overwrite the untouched original.
Decision guide: which check should you use?
| Your situation | Primary check | Next action |
|---|---|---|
| Notice generated through the GST common portal and an RFN is printed | GSTN Verify RFN, pre-login or post-login | Confirm all returned fields, then inspect Additional Notices & Orders. |
| CBIC email or letter that identifies a DIN | Applicable CBIC DIN verification | Compare the DIN result and issuing office; also check GST portal records when the communication relates to your GSTIN. |
| RFN matches but the amount appears wrong | Authentication is complete; substance remains open | Recalculate the demand and prepare a reply or obtain professional advice before the deadline. |
| No RFN/DIN result or conflicting metadata | Do not treat the message as authenticated | Preserve evidence, avoid payment and contact GSTN through the official helpdesk. |
| Notice has no visible signature | Portal record, not signature artwork | Use RFN and the logged-in record to establish whether it was generated through the authenticated officer workflow. |
Common mistakes to avoid
- Using the sender’s link: Type the official address yourself and use the portal’s own navigation.
- Checking only the number: Compare dates, module, communication type and office, not just whether an RFN is found.
- Confusing RFN with DIN: RFN is the identifier attached to GST common-portal documents; DIN applies to CBIC communications when required.
- Assuming authenticity proves liability: A real notice can still contain an incorrect amount or legal conclusion.
- Waiting until the deadline: Verification, records and professional review can take time.
- Editing the evidence: Preserve the original email and PDF before annotating copies.
- Sharing OTPs: No legitimate verification process requires you to disclose an OTP to an unsolicited caller or sender.
- Ignoring account security: Sign out on shared computers, use the official portal’s address and review recent account activity after a suspected phishing attempt.
Official routes and source dates
The GSTN advisory dated 25 September 2024 describes pre-login and post-login RFN verification and the post-login navigation. CBIC Circular No. 128/47/2019-GST, dated 23 December 2019, sets out the DIN requirement for applicable CBIC communications. CBIC Circular No. 249/06/2025-GST, dated 9 June 2025, lists the metadata returned by portal verification and explains why a separate DIN is unnecessary for documents generated through the GST common portal.
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Frequently Asked Questions
How do I verify a GST notice online?
Type gst.gov.in yourself and use the GSTN Verify RFN service at https://services.gst.gov.in/services/verifyRfn. Enter the RFN, then compare the returned RFN-generation date, document date, module, communication type and issuing office with the notice. After login, check Dashboard → Services → User Services → Additional Notices & Orders for the related record and summary.
Where do I verify the RFN on a GST notice?
Use the official GSTN Verify RFN page. It is available pre-login, and after login through Dashboard → Services → User Services → Verify RFN. Do not use a verification link supplied in an unsolicited email or SMS.
What is the difference between GST DIN and RFN?
RFN is the identifier attached to documents and summaries generated through the GST common portal. DIN is the Document Identification Number used for applicable CBIC communications, including emails. Portal-generated documents already carry an RFN, so a second DIN is not required for them.
Is a GST notice valid without a digital signature image?
A missing visible signature image does not automatically make a notice fake. GSTN describes portal documents as generated through an officer login authenticated with digital signature. Verify the RFN and the logged-in record, and compare the dates, office and communication type instead of relying on signature artwork.
What should I do if Verify RFN shows no record?
Re-enter the RFN carefully, retry later if there is an outage, and check Additional Notices & Orders after signing in. If the notice is a CBIC communication, check whether it should have a DIN and verify that separately. Preserve the original message and screenshots, do not pay or disclose OTPs, and contact GSTN at 1800-103-4786 or https://selfservice.gstsystem.in.
Does an RFN match prove that I owe the amount demanded?
No. It confirms that the communication record exists and identifies its source. You must still check the tax period, legal provision, computation, input-tax credit, payments, interest, penalty and reply deadline. Obtain professional advice if the demand is disputed.
The Bottom Line
Start with the official GSTN Verify RFN service, compare every returned field, and then confirm the communication under Additional Notices & Orders after login. Use DIN verification for applicable CBIC communications. A match authenticates the record—not the tax calculation—so preserve the evidence, protect the deadline and obtain qualified advice before paying or replying to a disputed demand.
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