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If the seller does not resolve the issue, use the National Consumer Helpline (NCH), which the Department of Consumer Affairs describes as a pre-litigation consumer grievance route. A GSTN Self Service Portal ticket is a different process for GST-system or service problems; it is not a substitute for a consumer complaint against a shop or online seller.
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Start by identifying what is actually wrong
Consumers often use “GST invoice” to mean any bill. The first step is to separate three different disputes:
- The percentage or amount of GST shown may be incorrect.
- The seller may have supplied no bill or proof of purchase at all.
- The seller may have supplied a bill but refused a particular format, such as an invoice addressed to a business GSTIN.
Those situations can involve different rules. Section 31 of the Central Goods and Services Tax (CGST) Act requires a registered person supplying taxable goods to issue a tax invoice before or at the time of delivery or removal. The invoice must show the description, quantity and value of the goods, the tax charged and other prescribed particulars. For taxable services, the Act requires an invoice within the prescribed period, subject to statutory exceptions. It also provides for bills of supply in specified cases, including exempt supplies and supplies by a person paying tax under the composition scheme.
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Section 31 says a registered supplier of taxable goods shall issue a tax invoice “showing the description, quantity and value of goods, the tax charged thereon and such other particulars as may be prescribed”.
This does not mean every transaction produces the same document. Before alleging that a seller has broken the law, establish whether the seller is registered, whether the supply is taxable, and whether an exception calls for a bill of supply or another document. A private consumer does not need a GSTIN merely to receive proof that a purchase occurred.
Preserve evidence before contacting the seller
Keep copies of the records that show what was bought, from whom, when and for how much. A practical evidence file can include:
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- The invoice, receipt, order confirmation, quotation or checkout screen.
- Proof of payment, such as a card statement, bank entry, UPI confirmation or cash receipt.
- The product name, model, quantity, service description and delivery or performance date.
- The seller’s legal name, trading name, address, contact details and GST particulars displayed on the document or website.
- Photographs of a paper bill, shelf label, menu, price display or package where the tax treatment is relevant.
- Emails, messages, call summaries and screenshots showing that you asked for an explanation or invoice.
These are sensible supporting records, not a universal statutory checklist. Keep the original files and note when each conversation occurred. Do not alter an invoice image or rely only on a phone call that cannot later be verified.
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Ask the seller for a written explanation and the correct document
Write to the seller before escalating. State the transaction date, item or service, amount paid and the precise document or correction you want. Ask the seller to identify the classification and notification or other basis used for the GST rate. If the seller says the supply is exempt, under composition, or otherwise outside ordinary tax-invoice treatment, ask for the document applicable to that situation.
You can use a neutral message such as:
On [transaction date] I purchased [item/service] for ₹[amount], order or receipt number [number]. The document shows GST of [rate/amount], or no invoice was provided. Please confirm the supply classification, the GST basis and whether the transaction requires a tax invoice, bill of supply or other proof of sale. If the document is incorrect, please issue a corrected document and explain any adjustment to the amount paid. Please reply in writing.Do not accuse the seller of tax fraud merely because the rate differs from one you remember. Ask for a response and preserve it. A written refusal can be more useful to a consumer-grievance body than an unrecorded conversation.
Check whether the GST rate is actually wrong
An invoice percentage cannot be assessed in isolation. Confirm all of the following before claiming overcharging:
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- Identify the exact goods or service, including material, use, size, model or bundled components where those facts affect classification.
- Record the supply or delivery date, invoice date and any advance or payment date.
- Check the seller’s GST registration details and whether the seller says it uses the composition scheme.
- Find the official rate notification applicable to that classification and period, or obtain advice from a qualified tax professional.
- Compare the tax calculation with the taxable value and any separately stated charges.
The Department of Consumer Affairs’ GST FAQ explains that rate-change cases can depend on time-of-supply provisions and on the dates of supply, invoice and payment. It records that changes following the GST Council’s 56th meeting generally took effect on 22 September 2025. Specified pan masala and tobacco products were excluded pending a later notified date. That timing note is not a complete current rate table, so it cannot by itself determine the rate for your purchase.
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For a defensible complaint, write down the classification and dates you checked. If those facts are uncertain, describe the issue as a request for clarification rather than stating as fact that the seller charged an illegal rate.
Which official route should you use?
Choose the route according to the problem, not merely because the word GST appears on the bill.
| Route | Best suited to | Record created | What it does not promise |
|---|---|---|---|
| National Consumer Helpline (NCH/INGRAM) | A consumer complaint against a seller about a missing document, an unexplained charge or an unresolved service issue | A consumer grievance docket number for tracking | It is a pre-litigation mechanism; it does not guarantee a refund or formally adjudicate the correct tax rate |
| GSTN Self Service Portal | A GST system, portal or service problem, such as difficulty with a GSTN workflow | A technical/service reference number | It is not the primary consumer forum for a shop or seller refusing an invoice |
| Consumer Commission | Further consumer redress when the consumer remains dissatisfied after the NCH route | A formal consumer-case process under the applicable rules | The sources for this article do not establish the correct commission, jurisdiction, limitation period or current e-filing steps for every case |
Use the National Consumer Helpline for a seller grievance
The Department of Consumer Affairs describes NCH as an integrated grievance mechanism and an alternate dispute-redressal route at the pre-litigation level. Its official wording is: “This portal is an alternate dispute redressal mechanism at pre-litigation level. In case, the consumer is not satisfied, he/she can approach the appropriate Consumer Commission.”
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A Department of Consumer Affairs release dated 20 September 2025 announced a dedicated GST complaint category on the INGRAM portal. The release lists sub-categories including automobiles, banking, consumer durables, e-commerce, FMCG and others. It says NCH supports multiple registration modes and assigns docket numbers so complaints can be tracked.
The same release reported, for its stated periods, 1,142 convergence partners; more than one lakh complaints per month; average complaints rising from 37,062 per month in 2017 to 1,70,585 in 2025; calls rising from 12,553 in December 2015 to 1,55,138 in December 2024; and nearly 65% of grievances being registered through online and digital channels. Those are reported historical figures, not a promise about current volume, response time or outcome.
How to register a useful NCH complaint
- Gather the invoice or order record, payment proof, seller details and your written request to the seller.
- Choose the GST-related category that best describes the issue, such as an unexplained charge or refusal to provide the appropriate document.
- Describe facts in date order: what you bought, what document you received or did not receive, the amount and rate shown, what you asked the seller to do and how the seller responded.
- Attach readable copies and identify the exact remedy you seek, such as an explanation, corrected document or adjustment of an amount that was improperly collected.
- Save the docket number and every reply. Update the complaint if the seller later provides a document or partial response.
Keep the wording factual. NCH can facilitate a consumer response, but the service does not guarantee that the seller will agree with your calculation or that a refund will be ordered.
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GSTN’s Self Service Portal is designed for a GST system or service issue. Its workflow asks you to enter a keyword, choose a category and subcategory, review the displayed FAQ material and lodge a complaint if the FAQ does not solve the problem. The system provides a reference number for checking status.
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For example, a portal error that prevents a registered user from completing a GST function belongs in that workflow. A retailer declining to give you a bill is primarily a consumer-versus-seller dispute, so start with the seller and NCH rather than expecting a GSTN ticket to obtain compensation or a corrected invoice.
What to do if the seller refuses any invoice
If the seller is registered and the supply is taxable
Ask for the tax invoice required for that supply and retain the refusal. Request the seller’s GSTIN and the particulars that should appear on the document. If the seller says the system is unavailable, ask when the document will be issued and request written confirmation of the sale and amount paid in the meantime.
If the supply may be exempt or the seller uses composition
Ask whether a bill of supply or another prescribed document applies. Do not insist that the seller issue a document type that the law does not require for that transaction. The question is whether the seller provided the correct document for its status and the nature of the supply.
If the seller refuses an invoice addressed to a business
Separate a request for ordinary proof of purchase from a request for a document containing a buyer’s GSTIN or other business particulars. The available rules establish general tax-invoice obligations, but they do not resolve every question about a buyer’s preferred format or input-tax-credit eligibility. A private consumer can still ask for proof of purchase without having a GSTIN.
Common mistakes that weaken a complaint
- Relying on a familiar percentage. The same broad product category can contain classifications with different treatment, and rate changes can depend on transaction dates.
- Ignoring the seller’s status. Registration, composition and exemption can determine whether the document is a tax invoice or a bill of supply.
- Submitting only a screenshot. Include payment evidence, dates, item details and the seller’s response so the complaint can be understood without guessing.
- Using a technical GSTN ticket for a retail dispute. A system reference number does not replace a consumer grievance docket.
- Copying old complaint directions. Older GST FAQ compilations contain legacy anti-profiteering material and references to former authorities. Do not use old email addresses or routes as current instructions without verifying them.
- Demanding a guaranteed outcome. NCH is facilitation at the pre-litigation stage; it is not a ruling that automatically orders a refund.
If NCH does not resolve the matter
The Department of Consumer Affairs says a dissatisfied consumer may approach the appropriate Consumer Commission after using the pre-litigation NCH route. The correct commission, territorial or pecuniary jurisdiction, limitation period and filing method depend on the facts and current rules; verify those details for your case or obtain qualified legal advice.
Prepare the same evidence file, add the NCH docket and responses, and state the remedy sought. If the disputed tax amount is small but the seller’s conduct affects many consumers, explain the pattern only if you have records supporting it. Do not inflate the amount or allege a deliberate tax offence without evidence.
Quick Recap
A practical decision checklist
- Have a document? Identify whether it is a tax invoice, bill of supply, receipt or merely an order confirmation.
- Rate appears wrong? Confirm classification and supply, invoice and payment dates before calculating a difference.
- Seller cooperative? Obtain the explanation and corrected document in writing.
- Seller refuses or ignores you? File a factual GST-related consumer grievance through NCH/INGRAM and retain the docket number.
- Problem is a GST portal failure? Use the GSTN Self Service Portal’s keyword, category, FAQ and ticket workflow.
- Still dissatisfied? Consider the appropriate Consumer Commission route after checking current jurisdiction and filing requirements.
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