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Verify a GST notice by checking its Reference Number (RFN) in the GST Portal’s official Verify RFN service before responding or paying anything. You can check it without signing in at https://services.gst.gov.in/services/verifyRfn, or after signing in at www.gst.gov.in through Dashboard → Services → User Services → Verify RFN. Enter the RFN and captcha, then compare the returned issuing office, communication type, module and dates with the notice. A portal-generated PDF can be valid even when no visible digital-signature mark appears on the document.
What the GST Portal is actually verifying
The Verify RFN service checks whether the identifier printed on a GST communication corresponds to a record created in the GST system. The result is more useful than inspecting the appearance of a downloaded PDF because it ties the notice to the portal’s record of its issuing office, document type and dates.
GSTN’s advisory of 25 September 2024 addressed notices, assessment orders and refund orders whose downloaded PDFs did not display an obvious signature panel. The advisory explains that an officer authenticates into the portal with a digital signature before taking these actions. The system then stores the order information and issuing-officer information in digitally signed JSON. In other words, the authentication may be attached to the portal record rather than rendered as a visible signature image on every PDF.
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RFN, DIN and other identifiers: use the one that belongs to the communication
GST communications do not all use the same identifier. Identify the channel that produced the document before choosing a verification route.
| Identifier | Where it is generally used | What to do |
|---|---|---|
| RFN (Reference Number) | Communications generated through the GST common portal, including portal notices and certain State GST offline communications that have been assigned an RFN. | Enter the RFN in the GST Portal’s Verify RFN service and compare the returned record. |
| DIN (Document Identification Number) | Central GST officer communications that use the CBIC DIN facility, and other routes that specifically instruct the recipient to validate a DIN. | Use the applicable CBIC or departmental DIN verification facility named in the communication. |
| eOffice Issue Number | Some Directorate General of Intelligence and Investigation (DGGI) communications issued through an eOffice workflow. | Validate the eOffice Issue Number, DIN or RFN through the relevant official route before acting. |
CBIC Circular No. 249/06/2025-GST says that documents generated on the common portal carry a verifiable RFN. Its verification output includes the RFN-generation date, document-issue date, module, communication type and issuing office.
For a communication served through the common portal under section 169(1)(d) of the CGST Act, CBIC clarifies that a verifiable RFN is sufficient. The communication does not need a second DIN merely because it is an official tax document. Do not reject an otherwise matching RFN notice solely because you cannot find a separate DIN on it.
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Have the complete notice open, preferably from the original portal download rather than a forwarded image or cropped screenshot. Locate the RFN, which may appear in the header, footer or document metadata. Record the following details exactly as printed:
- RFN, including every letter, number, slash and hyphen.
- Date shown as the document or issue date.
- Name of the GST module or service mentioned in the notice.
- Communication type, such as a notice, order or refund-related communication.
- Issuing office, commissionerate, jurisdiction or officer details.
- Any stated response deadline, monetary amount or period under examination.
Keep the original email or portal message as evidence of how the document reached you, but do not use a link embedded in an unexpected message to perform the verification. Type the official address yourself or use a known bookmark. A genuine-looking PDF can be copied and altered; the portal record is the independent check.
How to verify a GST notice without logging in
The pre-login route is useful when you are checking a document before accessing your taxpayer account or when the notice concerns an entity for which you do not currently have login access.
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- Open the official Verify RFN page at https://services.gst.gov.in/services/verifyRfn.
- Find the field labelled for the RFN or reference number.
- Type the RFN exactly as it appears on the notice. Do not add spaces, punctuation or a DIN unless the field specifically requests it.
- Enter the displayed captcha. If it is difficult to read, use the page’s refresh control to generate another image rather than guessing repeatedly.
- Submit the request.
- Read the returned record and compare its issuing office, communication type, module, RFN-generation date and document date with the notice.
Pre-login verification is intended to establish whether the RFN maps to a GST record. It may show fewer details than the authenticated, post-login view, particularly for some State GST offline correspondence. Save or print the result if your browser permits it, and retain the date and time of the check with the notice file.
How to verify a GST notice after signing in
The post-login route provides a fuller authenticated view where the relevant facility supports it.
- Go to www.gst.gov.in and sign in with the taxpayer credentials that have access to the relevant GSTIN.
- From the dashboard, open Services.
- Select User Services.
- Choose Verify RFN.
- Enter the RFN printed on the notice and complete the captcha.
- Submit the verification request.
- Compare the portal response with the document before opening links, sharing credentials or making a payment in response to the notice.
The path documented by GSTN is Dashboard → Services → User Services → Verify RFN. Menu wording can vary slightly with portal updates, but the Verify RFN service is the destination; do not substitute a generic search result or an unofficial “notice checker.”
How to interpret the verification result
Do not stop at a message that merely says an RFN exists. Treat the result as a five-part identity check.
| Portal field | What to compare on the notice | Why it matters |
|---|---|---|
| RFN-generation date | The date the reference number was created, if shown in the document or its record. | It can reveal that a forwarded or altered copy predates or postdates the official record. |
| Document date | The issue or document date printed on the notice. | A matching RFN with a different document date requires clarification before you rely on the paper. |
| Module | The GST module named in the communication. | It should fit the subject of the notice, such as the return, refund or assessment workflow identified by the document. |
| Communication type | Whether the record is a notice, order, refund order or another communication. | A PDF labelled as an order should not resolve only to an unrelated notice type. |
| Issuing office | Commissionerate, jurisdiction or other office shown on the document. | The office returned by the portal should be the office that appears to have issued the communication. |
A result is consistent when the identifier and these contextual fields align closely enough that the portal record clearly describes the document in your possession. A record can exist while the copy you received is modified, mislabelled or attached to the wrong taxpayer. Compare the GSTIN, legal name, tax period and subject in the document as well as the five portal fields.
What to do when the PDF has no visible digital signature
A missing signature graphic is not the test for a portal-generated notice. GSTN’s 25 September 2024 explanation is that the officer authenticated to the portal with a digital signature and that the system retained the relevant order and officer details in digitally signed JSON.
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Use this decision sequence:
- Find the notice’s RFN.
- Verify the RFN through the official pre-login or post-login service.
- Confirm that the returned issuing office, communication type, module and dates match the document.
- Check the GSTIN, taxpayer name, period and subject for a separate mismatch.
- Keep the portal result with the downloaded notice for your records.
If the RFN resolves correctly and the substantive details match, the lack of a visible PDF signature alone does not invalidate the communication. If the RFN fails or the contextual fields conflict, stop treating the document as established until the discrepancy is resolved.
When a separate DIN is not required
For a common-portal communication served under section 169(1)(d) of the CGST Act, CBIC’s 2025 circular treats a communication with a verifiable RFN as valid for that purpose. The RFN is the portal’s verifiable identifier; a second DIN is not automatically required.
This rule is narrower than “every GST letter needs only an RFN.” Check the channel:
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- State GST offline correspondence: the 2023 GSTN facility guidance allows RFN verification before login and after login, with more details available after login in supported cases.
- Central GST officer document: the communication may use the CBIC DIN facility. Follow the identifier and verification instructions associated with that document.
- DGGI communication: the relevant identifier may be a DIN, eOffice Issue Number or RFN, depending on the issuing platform.
Do not force an RFN into a DIN checker or assume that a DIN must appear on a communication whose official record is identified by an RFN.
State GST, Central GST and DGGI: choosing the right route
State GST offline communications
Some State GST correspondence is created outside the normal portal notice workflow but can still carry an RFN. GSTN’s facility guidance distinguishes the information available before login from the greater detail available after login. Verify the RFN in both the appropriate pre-login or post-login route, then compare the returned office and document information with the paper communication.
Central GST communications
Central GST officer documents can use the CBIC DIN facility. If the document identifies itself as a Central GST communication and supplies a DIN rather than an RFN, use the official DIN verification route associated with that document. If it is a common-portal document with a verifiable RFN, apply the RFN rule described by CBIC.
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DGGI communications
The DGGI public-service guidance advises recipients to validate the relevant DIN, eOffice Issue Number or RFN before acting on suspicious communications. The identifier depends on the system that issued the communication, so read the document header and issuing-office information instead of choosing a checker based only on the word “GST.”
Troubleshooting an RFN that does not verify
The portal says no record was found
- Re-enter the RFN manually and check commonly confused characters such as zero and the letter O.
- Remove accidental spaces copied from a PDF and preserve meaningful hyphens or slashes.
- Refresh the captcha and submit again.
- Confirm that you are using the official Verify RFN page or the post-login menu path, not a third-party form.
- Check whether the document is actually a DIN or eOffice communication rather than an RFN communication.
If the exact identifier still produces no matching record, do not rely on the notice for a payment, disclosure of credentials or waiver of a deadline. Contact the relevant GST office through an independently obtained official channel and ask how the identifier should be validated.
The RFN exists but the details differ
A mismatch in issuing office, communication type, module or either date is a substantive warning. Preserve the original file and the verification result, then request clarification from the issuing authority. Do not edit the PDF to make the fields agree, and do not assume that a different date is harmless without confirmation.
The notice contains both RFN and DIN
Verify the RFN in the GST Portal and validate the DIN through the applicable Central GST facility if the document instructs you to do so. Record both results. The presence of two identifiers is not proof of fraud, but each identifier should lead to an official record that describes the same communication.
The page will not load or the captcha repeatedly fails
Use a current browser, enable cookies and JavaScript required by the government portal, and avoid repeatedly submitting stale browser tabs. Try the pre-login page separately from the authenticated dashboard. A temporary technical failure does not authenticate the notice; postpone reliance on it until an official verification result is available.
How to handle a suspicious or altered notice
Stop and preserve evidence when the RFN is invalid, the returned office is different, the communication type does not match, or the document demands action through an unusual payment link or private contact address.
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- Save the original email, portal download, attachment and headers where available.
- Take a screenshot or printout of the verification result showing the date of the check.
- Do not disclose GST credentials, one-time passwords, bank details or signing certificates in response to the document.
- Do not pay through a link in the message merely because the PDF uses a government logo.
- Contact the issuing office or tax authority using contact information obtained independently from the official GST or departmental website.
- Ask a qualified tax professional to review the document if a statutory deadline is close, while continuing to verify the communication through official channels.
Authentication and legal advice are separate questions. A notice can be genuine and still require a timely reply, supporting documents or professional representation. Verification establishes whether the communication is tied to an official record; it does not decide the merits of the tax issue.
Keep an auditable verification record
For each notice, retain a small evidence bundle:
- The unedited notice file as downloaded.
- The RFN, DIN or eOffice Issue Number exactly as printed.
- The date and time you checked the identifier.
- A saved PDF, printout or screenshot of the portal result, where available.
- Your comparison notes for the issuing office, communication type, module, RFN-generation date and document date.
- Any clarification received from the tax authority.
Use a consistent file name that does not alter the original document, such as the GSTIN, identifier and date of verification. Store the result with the case records so another authorised person can reproduce the check without relying on a forwarded message.
A practical example
Matching RFN, no visible signature
You receive an assessment-order PDF with an RFN but no signature image. The pre-login service returns the same RFN, the correct issuing office, the expected module and communication type, and matching RFN-generation and document dates. The GSTIN and tax period in the PDF also match your records. The missing visible signature is not, on its own, a reason to reject the document; retain the portal result and address the order within its stated deadline.
RFN record with a different office
A notice displays an RFN that resolves to a different issuing office and a different communication type. Treat that as unresolved, even though the number exists. Preserve the document, avoid acting on its payment or upload instructions, and obtain clarification from the relevant authority before relying on it.
Document carries only a DIN
A Central GST letter identifies a DIN and gives no RFN. Do not conclude that it is invalid because the GST Portal’s RFN service cannot find it. Use the CBIC DIN verification route specified for that communication and confirm the issuing office and document details there.
Quick Recap
Final checklist before you act
- Identify whether the document uses an RFN, DIN, eOffice Issue Number or another official identifier.
- Open the official verification service for that identifier.
- Enter the identifier exactly and complete the captcha or other authentication.
- Compare the issuing office, communication type, module and both dates returned by the service.
- Check the GSTIN, taxpayer name, tax period and subject in the document.
- Save the verification result with the original notice.
- Resolve any missing record or mismatch with the relevant tax authority before paying, uploading documents or sharing credentials.
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