What is a BIS HUID Code? How to Verify Gold Purity in 2026
If you have bought or inherited gold in India recently, you have likely heard the term HUID code. BIS hallmarking is mandatory consumer protection. But what does that tiny 6-digit alphanumeric code actually guarantee when you hold a piece of jewellery or a coin in your hand? Here is your complete guide to reading BIS hallmarks.
The 3 Visible Symbols on Every Genuine Gold Item
- BIS Logo: The triangular mark of the Bureau of Indian Standards certifying that the metal meets national standards.
- Purity & Fineness Mark: A clear indicator of metal purity (e.g., 22K916 for 22 Karat 91.6% purity, or 24K999 for 24 Karat 99.9% investment coins).
- 6-Digit Alphanumeric HUID: A unique Hallmarking Unique ID stamped on every individual piece. No two items in India share the same HUID.
How to Verify Your Gold Using the BIS CARE App
- Step 1: Download the official BIS CARE app on your smartphone.
- Step 2: Navigate to the "Verify HUID" feature on the home screen.
- Step 3: Type in the 6-digit code stamped on your jewellery or coin assay card.
- Step 4: Instantly view the registered jeweller’s name, hallmarking center details, item type, and exact tested karat purity.
Rule of thumb: If a seller offers you a discount to buy gold without a hallmark or HUID stamp, you are not saving money—you are buying unverified metal that will cost you heavily at sell-back.
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