How to Report a Fake GSTIN Number?

Updated: Oct 26, 2026 10 min read Hitesh Aggarwal Add as preferred source
Quick Summary
  • A fake or misused GST number may be invented, may belong to another business or may have been obtained using stolen identity documents.
  • Verify a GSTIN through Search Taxpayer on gst.gov.in. Check that its status is Active and that the supplier details match the invoice.
  • If your PAN has been used to obtain a GST registration without your knowledge, report it through Search Taxpayer > Search by PAN.
  • If a supplier gives you an invoice with a suspicious GSTIN, verify the details and do not claim ITC until the issue is resolved.
  • Incorrect ITC may have to be reversed with interest. Knowingly issuing or using fake invoices can also attract penalties or prosecution.

GST number misuse can occur in different ways. A supplier may quote an invalid GSTIN, use a number belonging to another business or obtain a registration using someone else’s PAN. The GST portal allows you to verify a supplier’s GSTIN and report registrations obtained through misuse of your PAN. The correct reporting process depends on which situation applies.

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What Is a Fake GSTIN and How Is It Misused?

A fake or misused GSTIN may be:

  • A number that does not exist on the GST portal.
  • A genuine GSTIN used by someone other than its registered owner.
  • A registration obtained using another person’s PAN or identity documents.
  • A cancelled or suspended GSTIN being presented as an active registration.

A cancelled GSTIN is not automatically fake. It may be a genuine registration that is no longer active. However, it should not be used to issue new tax invoices after the effective date of cancellation. Fake or misused GSTINs may be used to issue invoices without an actual supply, pass on ineligible ITC, conceal sales or make a fraudulent business appear legitimate.

What Is GSTIN?

GSTIN is the 15-character identification number given to a GST-registered business. It is linked to PAN and is used on tax invoices, returns and e-way bills. For a detailed explanation, read GSTIN: Meaning, Format and Common Issues.

Why Is It Necessary to Verify a GST Number?

Verification confirms whether a GST registration is active and whether the details shown on the portal correspond to the supplier. This reduces the risk of accepting an incorrect invoice or claiming unsupported ITC.

GST Identification Number Format

A GSTIN contains 15 characters. The first two show the state or Union Territory, characters 3 to 12 contain the PAN, the 13th identifies the registration, the 14th is normally “Z” and the last is a check character. See the complete GSTIN guide for the full format.

How to Identify and Verify a GSTIN?

Every registered GST taxpayer in India gets a unique 15 character GSTIN. This number is used on invoices, returns and e way bills. If a GSTIN is fake or misused, it can lead to loss of ITC, penalties and even legal trouble. So it is important for businesses, CAs and individuals to know how to quickly verify a GSTIN and spot basic red flags.

How to Verify a GSTIN Number?

Verifying a GSTIN (Goods and Services Tax Identification Number) is essential to ensure that you’re dealing with a legitimate and compliant business entity. You can verify any GSTIN online using these simple steps:

  • Visit the Official GST Portal: Go to www.gst.gov.in.
  • Navigate to ‘Search Taxpayer’: On the homepage, under the “Search” tab, click on Search by GSTIN/UIN.
  • Enter the GSTIN: Type the 15-character GSTIN  you want to verify.
  • Solve the Captcha and click on Search.

If valid, the portal will show:

  • Legal name and trade name of the business
  • GST registration status (Active/Inactive)
  • Nature of business (Regular, Composition, etc.)
  • Type of taxpayer and place of business

This tool helps confirm whether a supplier or customer is genuinely registered under GST.

Valid GSTIN vs Fake or Dummy GST Number

Dummy or sample GST numbers used in tutorials and software demonstrations are only examples. They are not genuine registrations and must not be used on tax invoices or GST returns.

What to check

GSTIN format

What you should find

A 15-character GSTIN in the prescribed format

Warning sign

Incorrect length or character pattern

What to check

State or UT code

What you should find

A valid code matching the supplier’s registered state or Union Territory

Warning sign

The code does not match the registration details

What to check

PAN details

What you should find

Characters 3 to 12 match the supplier’s PAN

Warning sign

The PAN section belongs to another person or business

What to check

Final characters

What you should find

The 14th character is normally “Z” and the last character passes the format check

Warning sign

The ending does not follow the required format

What to check

Portal status

What you should find

The GST portal shows the registration as Active

Warning sign

The GSTIN is not found, Cancelled or Suspended

What to check

Supplier details

What you should find

The legal or trade name shown on the portal corresponds to the supplier

Warning sign

The portal shows an unrelated business

What to check

Returns, e-invoices and e-way bills

What you should find

Records are consistent with the transaction where these requirements apply

Warning sign

Required records are missing or contain conflicting details

A missing return or e-way bill can be a warning sign, but it does not by itself prove that a GSTIN is fake. Always verify the GSTIN and the transaction together.

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How to Report a Fake GSTIN

These steps apply when your PAN has been used to obtain a GST registration without your knowledge. They explain how to report the unauthorised registration through the GST portal.

  1. Visit gst.gov.in and open Search Taxpayer > Search by PAN.
  2. Enter your PAN and the captcha to view the GST registrations connected with that PAN.
  3. Review the list and identify any registration you did not apply for or authorise.
  4. Select the unknown GSTIN and choose Report.
  5. Enter the identity, contact and address details requested by the portal. Complete the mobile and email verification.
  6. If the registration is in a category other than proprietorship, the portal may ask for additional personal details and Aadhaar authentication.
  7. Submit the complaint and save the Application Reference Number generated for each reported GSTIN.

The complaint is sent to the jurisdictional officer responsible for the reported registration.

Information and Documents to Keep Ready

If Your PAN Has Been Misused

Keep your PAN, contact details, address and the GSTINs you do not recognise ready. The portal may also request your date of birth and Aadhaar authentication, depending on the registration category.

If a Supplier Has Used a Suspicious GSTIN

Keep copies of the invoice, payment records, purchase or delivery documents, GSTIN search results and your communication with the supplier. Include a short explanation of why you believe the GSTIN or invoice is suspicious.

The jurisdictional officer may request additional information while examining the complaint.

What Happens After Filing a Complaint?

For PAN-misuse complaints, an Application Reference Number is generated for each GSTIN reported. The complaint is sent to the relevant jurisdictional officer for enquiry and appropriate action. Depending on the findings, the officer may begin proceedings against the registration, including suspension or cancellation where applicable.

What Should You Do If You Receive an Invoice With a Fake GSTIN?

First, search the GSTIN on gst.gov.in and compare the registration status and supplier details with the invoice.

If the GSTIN is not found, is inactive or belongs to another business, contact the supplier and request an explanation or corrected invoice. Do not claim ITC until the supplier and invoice details have been verified.

Keep the invoice, payment proof, delivery records, GST portal search results and all communication with the supplier. If the issue is not resolved, submit a written complaint with this evidence to the supplier’s jurisdictional GST officer. Use the GSTN helpdesk only if you are facing a technical problem with the portal.

If ITC has already been claimed, ask your CA or GST adviser whether it needs to be corrected or reversed. ITC requires a valid tax invoice issued by a registered supplier and the other conditions prescribed under GST law.

Legal Consequences of Using a Fake GSTIN

Receiving a suspicious invoice does not automatically make the buyer liable. However, ITC claimed without a valid invoice or genuine underlying supply may have to be reversed, along with applicable interest.

Penalties may apply where a person knowingly issues a false invoice, uses another registered person’s GST number or claims ITC without receiving the goods or services. Serious cases involving deliberate fraud may also lead to prosecution. The action taken depends on the facts and the person’s involvement.

How can you Prevent Misuse of PAN?

Your organisation could suffer financial losses if your PAN is misused. We’ve compiled a set of advice to help you avoid PAN misuse to prevent this:

  1. Never reveal your PAN Card to anyone besides a reputable and reliable CA.
  2. Share your PAN card details only when necessary and never while conducting regular transactions.
  3. Never use free online tools to store sensitive papers or information.
  4. Never share such private details online.
  5. When submitting documents, remember to sign them and date them. Record the places you’ve delivered physical copies of your PAN card.

Also Know More About: GSTIN Search

Conclusion

A GSTIN is more than just a number on an invoice. It is the identity of a registered taxpayer and a key link in the GST credit chain. Verifying every new GSTIN, spotting basic red flags, and knowing how to report fake or misused GST numbers protects both your ITC and reputation.

By combining simple checks on the GST portal, good documentation habits and smart tools like BUSY’s GST calculators and software, businesses and CAs can reduce the risk of fraud, avoid wrongful ITC claims and stay on the right side of the law with far less stress.

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Frequently Asked Questions

Clear answers to common queries about this topic.

What are the common signs of a fake GSTIN?

Warning signs include an incorrect GSTIN format, a number that is not found on the GST portal, an inactive registration or supplier details that do not correspond to the invoice. Missing or inconsistent e-invoice, e-way bill or return information may also require further checking, but it does not by itself prove fraud.

How can you verify a GSTIN before making a transaction?

Visit gst.gov.in and select Search Taxpayer > Search by GSTIN/UIN. Enter the GSTIN and confirm that its status is Active. Compare the legal or trade name, taxpayer type, state and registration details with the supplier and invoice.

How can you identify a fake GST invoice?

Check whether the GSTIN is valid and active, whether it belongs to the supplier and whether the invoice contains the required details. Where e-invoicing applies, verify the IRN and QR code. Also confirm that the goods or services were actually received.

How can you report a fake GSTIN?

If your PAN was used to obtain a registration without permission, use Search Taxpayer > Search by PAN on the GST portal and report the unknown GSTIN. If a supplier has given you a suspicious invoice, keep the supporting evidence and submit a written complaint to the supplier’s jurisdictional GST officer.

What is a fake GST number?

A fake GST number may be an invented number, a GSTIN belonging to another business or a registration obtained using stolen identity documents. A cancelled or suspended GSTIN is not necessarily fake, but it is not an active registration and should be investigated before accepting an invoice.

What is a dummy GST number?

A dummy GST number is a sample number used in tutorials, demonstrations or software testing. It is not a real GST registration and must not be used on tax invoices, GST returns or other official documents.

Can I claim ITC on an invoice with a fake GSTIN?

No ITC should be claimed on the basis of an invented GSTIN or an invoice that was not issued by the registered supplier shown on it. Verify the GSTIN, invoice and actual supply first. Appearance in GSTR-2B is important, but all the other ITC conditions must also be met.

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Hitesh Aggarwal

Chartered Accountant

As a Chartered Accountant with over 12 years of experience, I am not only skilled in my profession but also passionate about writing. I specialize in producing insightful content on topics like GST, accounts payable, and income tax, confidently delivering valuable information that engages and informs my audience.

MRN: 529770 Delhi