From June 2021, every gold jewellery piece sold in India is required to carry a six-digit alphanumeric HUID – Hallmark Unique Identification number – that links it permanently to the BIS (Bureau of Indian Standards) database. Before you sell your gold, knowing how to check and verify this number gives you two advantages: it confirms the BIS-certified purity of your piece, and it protects you from buyers who undervalue properly hallmarked gold.
This guide explains what the HUID number is, how to check it on the BIS Care app in under 60 seconds, and what to do if your gold was purchased before 2021 and has no HUID.
At a Glance
| Introduced | June 2021 (BIS mandatory hallmarking) |
| Format | 6-digit alphanumeric (e.g., AB1234) |
| Location on piece | Stamped alongside BIS logo, purity mark & jeweller code |
| Verification | BIS Care app (Android & iOS) – free |
| Pre-2021 gold | No HUID – still sellable, XRF confirms purity |
| Benefit for seller | Confirms purity before accepting any buyer’s quote |
| Last Updated | May 2026 |
What Is the HUID Hallmark? – The Four-Part BIS Mark Explained
Every hallmarked gold piece sold in India carries four elements: the BIS hallmark logo (triangle), the purity grade (916/750/585/999), the HUID (6-digit alphanumeric) and the assaying centre code. The HUID is the newest addition – mandatory since June 2021 – and it is the most consumer-friendly because it is verifiable instantly on your smartphone.
BIS Hallmark Elements
| Element | What It Means | Where on the Piece |
| BIS Hallmark Logo | Certified by Bureau of Indian Standards | Triangle with BIS text |
| Purity Grade | 916 = 22K, 750 = 18K, 585 = 14K, 999 = 24K | Adjacent to BIS logo |
| HUID (6-digit) | Unique ID traceable on BIS Care app | Engraved alongside purity mark |
| Jeweller Code | Identifies the retailer who sold the piece | 4-character code near hallmark |
How to Check HUID on BIS Care App – Step by Step
● Step 1: Download ‘BIS Care’ from Google Play or the Apple App Store (free).
● Step 2: Open the app and tap ‘Verify HUID’ on the home screen.
● Step 3: Enter the 6-digit alphanumeric HUID from your piece – or scan it using the app’s camera.
● Step 4: The app instantly shows the registered purity (e.g., 916 = 22K), karat, jeweller name, assaying centre and date of hallmarking.
● Step 5: Compare the app result with what the buyer is telling you. If there is any discrepancy, ask for XRF testing before accepting the quote.
💰 Get the Best Price for Your Gold Today
Instant valuation • Transparent pricing • 100% secure & trusted
Common HUID Use Cases
● Verifying 22K (916) purity before accepting a buyer’s verbal quote
● Checking whether old jewellery purchased pre-2021 is hallmarked at all
● Confirming stone-set pieces where XRF may not be accessible
● Seller peace of mind – know your purity before you walk into any branch
● Identifying pieces that may have been incorrectly hallmarked
HUID & Resale Value – What It Means for Sellers
Even without an HUID, your gold is fully sellable. Attica Gold uses a BIS-calibrated XRF machine that reads purity directly from the metal – no HUID or bill required. The HUID check is a pre-visit confidence step that helps you understand your piece’s purity before accepting any quote.
For a 10g 22K (916) piece verified via HUID: 10 × 0.916 × ₹15,250 = ₹1,39,690 today. Any buyer paying less than this (minus stone and solder deductions) without explanation owes you a written justification.
Tax Treatment When You Sell
Gold held over 24 months attracts 12.5% LTCG when sold; held under 24 months, your gain is added to slab income. Aadhaar is mandatory; PAN is required if your sale exceeds ₹2,00,000.
What to Watch For – Seller Protection
● Buyers who dismiss hallmarked gold as ‘below 22K’ without XRF testing
● Verbal purity claims that contradict the BIS Care app reading
● No written receipt after purchase – always insist on a signed document
● Pre-2021 gold described as ‘non-genuine’ because it lacks HUID – this is wrong; XRF confirms purity regardless
● Buyers who refuse to show the per-gram rate – always ask for it in writing before agreeing
Why Choose Attica Gold Company
Attica Gold Company is ISO 9001:2015 certified with 200+ branches across Karnataka, Tamil Nadu, Andhra Pradesh, Telangana and Pondicherry. Every branch uses a BIS-calibrated XRF machine – HUID or no HUID, the machine reads actual purity from the metal in 30 seconds in front of you.
Payment is made instantly by cash (up to ₹1,99,999), UPI, IMPS or bank transfer on the same day. Your wait is over.
📞 CALL TO ACTION
Visit your nearest Attica Gold branch to sell at today’s live rate.
🌐 atticagoldcompany.com/branch-locator | 📞 +91 8880 300 300
Sell Gold for Cash → atticagoldcompany.com/services/sell-gold-for-cash/
Frequently Asked Questions
What is a HUID number on gold?
HUID stands for Hallmark Unique Identification. It is a 6-digit alphanumeric code stamped on hallmarked gold jewellery by a BIS-accredited assaying centre. Every HUID is unique to that piece and is linked to the purity, karat, jeweller and assaying centre in the BIS national database.
How do I check HUID on the BIS Care app?
Download the BIS Care app (Android or iOS). Open the app and tap ‘Verify HUID’. Enter the 6-digit code from your piece. The app shows the purity, karat, jeweller name and assaying centre in seconds. The app is free and does not require registration.
What if my gold does not have a HUID?
Gold purchased before June 2021 was not required to carry a HUID. Older hallmarked pieces carry only the BIS logo, purity mark and assaying centre code. This gold is still fully sellable – Attica Gold’s XRF machine determines purity regardless of whether the piece has a HUID.
Does HUID affect the price I get for my gold?
No. The selling price is based on XRF-confirmed purity and weight – not the HUID. The HUID is a verification and traceability tool for you, not a pricing variable. A piece with HUID and one without HUID of identical purity and weight will fetch the same cash at resale.
Can a HUID be faked or duplicated?
The BIS database is centralised and government-controlled. A fake HUID either won’t appear in the BIS Care app or will show a mismatch between the claimed purity and the database entry. Always verify using the official BIS Care app before accepting any seller’s verbal purity claim.
What is the BIS Care app?
BIS Care is the official app of the Bureau of Indian Standards, available free on Android and iOS. It allows consumers to verify gold hallmark HUID numbers, check product certifications and file complaints about substandard goods.
Is gold without HUID worth less at Attica?
No. Attica Gold buys gold with or without HUID, with or without a bill, pre-2021 or post-2021. The XRF machine determines purity from the metal. You receive the same per-gram rate as hallmarked gold of identical purity.
