What is a HUID?
HUID stands for Hallmark Unique Identification. Under the BIS gold jewellery hallmarking system, it is a six-character alphanumeric identifier assigned to a hallmarked article. HUID is a traceability element; simply seeing a six-character code is not proof that the article is genuine.
Three elements to inspect
BIS describes the modern hallmark on gold jewellery as three elements: the BIS Standard Mark, the stated purity in carat and fineness, and a six-character HUID.
- BIS logo or Standard Mark on the article.
- Purity marking, such as 22K916 or 18K750, consistent with the article.
- A six-character alphanumeric HUID: verify it in the official BIS Care app.
Official verification steps
Hallmark Helper does not operate the BIS HUID registry and cannot independently authenticate a code. Only official BIS verification should be relied upon.
- Install or open the official BIS Care application.
- Select the “Verify HUID” feature.
- Enter the HUID engraved on the actual jewellery article.
- Compare the app result with the article and invoice; investigate mismatches before purchase.
Before leaving the shop
Keep the invoice showing article description, net precious-metal weight, purity and hallmarking charges. For uncertainty about fineness, BIS also describes consumer testing at recognised Assaying and Hallmarking Centres.