How to Check BIS Hallmark and HUID on Gold Jewellery
A BIS hallmark is the government-backed proof that your gold is the purity the jeweller claims. Since 2021 every hallmarked piece also carries a unique six-character HUID that you can verify on your phone.
The three marks
- BIS logo — a triangle-shaped mark of the Bureau of Indian Standards.
- Purity grade — karat and fineness, such as 22K916 or 18K750.
- HUID — a six-character alphanumeric code (for example, AB12C3) unique to that piece.
The marks are tiny, usually on the clasp, hook or inner side. Ask for a magnifying glass at the counter.
Verify the HUID
- Install the free BIS CARE app (Android and iPhone).
- Choose Verify HUID.
- Enter the six-character code.
- The app shows the jeweller's registration, the purity, the type of article and the hallmarking centre.
If the details do not match the piece in your hand — for example, the app says 18K but you are being sold "22K" — do not buy until the jeweller explains.
Put the HUID on the bill
Ask for the HUID, karat, gross weight and net weight to be printed on your invoice. It makes resale and exchange easier and gives you evidence if there is a dispute.
Complaints
If hallmarked jewellery is found to be below the stamped purity, you can file a complaint through the BIS CARE app or the BIS website. Keep the bill and a photo of the hallmark.