HUID hallmark check: how to verify your gold
Every hallmarked gold piece carries three marks. Here is how to read them, and how to check the HUID yourself on your phone with the official BIS CARE app.
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The three marks on a hallmarked piece
The Bureau of Indian Standards (BIS) says hallmarked gold jewellery carries the BIS standard mark, the purity of the gold in carat and fineness, and a 6-digit alphanumeric HUID code. Source: PIB.
1. BIS logo
The BIS standard mark, the triangle logo of the Bureau of Indian Standards.
2. Purity grade
The carat and fineness together, such as 22K916 or 18K750.
3. HUID
A 6-character code of letters and numbers, unique to this piece.
The marks are tiny. Use the zoom on your phone camera or a magnifying glass to read them. The Government of India announced that hallmarked gold jewellery sold without a HUID would not be permitted after 31 March 2023. PIB
Verify the HUID in five steps
You need a smartphone and the piece in your hand.
Find the HUID on the piece
It is printed next to the BIS logo and the purity grade. Read the 6 characters carefully; letters and numbers can look alike at that size.
Install the BIS CARE app
Get it from Google Play or the App Store, and check that the publisher is the Bureau of Indian Standards.
Open "Verify HUID"
It is one of the options in the app. Follow the prompts the app shows.
Enter the HUID
Type the 6-character code from the piece.
Compare with your bill
BIS says the app gives you the jeweller's registration number and details of the Assaying and Hallmarking Centre that hallmarked the piece. Check that they make sense against your invoice, and ask the jeweller if anything does not.
If you still have doubts
A hallmarked piece can be tested at a BIS-recognised Assaying and Hallmarking Centre (a testing fee applies), and complaints can be made through the BIS CARE app or the BIS website. Check the current details on the BIS pages below.
Official sources
Questions people ask
What is a HUID?
HUID stands for Hallmark Unique Identification. It is a 6-digit alphanumeric code (letters and numbers) that is unique to each hallmarked piece of jewellery, so the piece can be traced.
What marks should I see on a hallmarked gold piece?
Three: the BIS logo, the purity in carat and fineness, for example 22K916, and the 6-character HUID.
How do I check a HUID?
Install the BIS CARE app from the Bureau of Indian Standards, choose "Verify HUID", and enter the code printed on the piece. It is available for both Android and iOS.
What does 916 mean?
916 is the fineness: 91.6 percent gold, which is 22 carat. In the same way 750 is 75 percent gold, or 18 carat, and 999 is 99.9 percent gold, or 24 carat.
Can a hallmarked piece be tested again?
Yes. According to BIS, a hallmarked piece can be tested at a BIS-recognised Assaying and Hallmarking Centre; a testing fee applies. Check the current details on the BIS website.
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