BIS Hallmark Verification Guide 2026: How to Read, Authenticate & Spot Fakes

The Golden Standard: Why BIS Hallmarking Matters More Than Ever

In 2023, the Bureau of Indian Standards (BIS) implemented mandatory hallmarking across India. For the first time in Indian jewelry history, virtually every piece of gold sold is legally required to bear the hallmark. This landmark change transformed jewelry buying from a trust-based transaction to a verification-based one.

But here's the problem: most Indian gold buyers still don't understand what the hallmark symbols mean, how to verify them, or how to spot counterfeits.

This comprehensive guide decodes the entire BIS hallmarking system, teaching you exactly how to read marks on your jewelry, verify authenticity using the HUID system, identify red flags of counterfeit jewelry, and protect yourself as a buyer.

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What Is BIS Hallmarking? A Brief History

Before 2023: The Trust Problem

Before mandatory hallmarking, Indians bought gold based almost entirely on trust. You trusted your jeweler. You trusted the purity marked on the receipt. You had virtually no independent verification. This trust-based system created massive opportunities for fraud—jewelers selling 18K gold as 22K, mixing base metals, and pocketing huge margins.

After 2023: The Verification Revolution

In June 2023, India made hallmarking mandatory for all gold jewelry. This means:

• Every piece sold MUST have hallmark
• Every hallmark is registered with BIS
• Every hallmark has a unique HUID code
• You can verify any piece independently
• Sellers who don't hallmark face ₹5 lakh fines + imprisonment

This single change transformed India's jewelry market from a trust economy to a verification economy.

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The 3 BIS Hallmark Symbols Explained

Every properly hallmarked gold piece in India has exactly 3 symbols. Understanding these symbols is your first line of defense against fraud.

Symbol #1: The Fineness Mark (Purity Indicator)

What it shows: The actual purity of the gold in that piece Common marks in India: How to identify on jewelry: Usually stamped as a 3-digit number: 999, 916, 750, etc. What NOT to buy:

• Any piece below 750 purity (less than 75% gold)
• Pieces with illegible purity marks
• Pieces claiming "purity" without numbers

Symbol #2: The Assay Office Mark (Verification Authority)

What it shows: Which BIS assay office certified this piece How it works: India has multiple BIS assay offices, each with a unique city symbol. This ensures decentralization and local verification. Major Assay Office Marks: Why it matters: If you buy jewelry in Delhi, it should have Delhi's mark. Jewelry from other regions will have different marks. Mismatched marks are a red flag for counterfeits.

Symbol #3: The HUID (Hallmark Unique Identification Code)

What it is: A 6-digit unique code assigned to each piece of hallmarked jewelry Example HUID code: H47K28 How it works:

• Each piece gets ONE HUID code
• Code is laser-marked on jewelry
• Code is registered in BIS database
• You can look it up online using BIS Care app

Why HUID is revolutionary: Before HUID, hallmarks could be copied/faked. HUID makes that nearly impossible because each code is registered and traceable.

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Where Are These Marks Located on Your Jewelry?

This is crucial. Knowing where to look for hallmarks prevents you from thinking unmarked jewelry is hallmarked.

On Rings

Mark location: Inside the band, near the size marking How to find it: Shine light inside ring and look carefully near where it says "size 16" or similar What you'll see: 3 tiny symbols clustered together Red flag: No marks inside ring = either old jewelry or counterfeit

On Bangles

Mark location: Usually on the inner surface, near the clasp or seam How to find it: Hold bangle up to light, inspect entire inner circumference What you'll see: Symbols may be faint but should be visible with magnification Red flag: Completely unmarked bangles are either pre-2023 (before mandatory hallmarking) or fake

On Necklaces & Chains

Mark location: On the clasp or on one of the link sections How to find it: Inspect the clasp carefully with magnifying glass What you'll see: Tiny symbols on clasp or inside link Red flag: No marks on clasp = fake or old jewelry

On Earrings & Studs

Mark location: On the post (back side) of each earring How to find it: Remove earring and look at the metal post What you'll see: Micro-sized symbols (very small, requires magnification) Red flag: Post is blank or smooth = counterfeit

On Pendants

Mark location: On the back of the pendant or on the bail (loop at top) How to find it: Flip pendant and inspect back surface carefully What you'll see: Symbols on back or on the bail connecting piece Red flag: Completely blank back = likely counterfeit

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How to Read Hallmark Symbols: Step-by-Step Guide

Step 1: Find the Marks

• Get a magnifying glass (3x-10x magnification minimum)
• Locate the marks on your jewelry (see location guide above)
• Use good lighting (natural sunlight best)

Step 2: Identify the Fineness Number

• Look for a 3-digit number (999, 916, 750, etc.)
• This is your purity indicator
• In India, 916 (22K) is most common
• Below 750 = not real gold jewelry

Step 3: Identify the Assay Office Symbol

• Look for the city symbol next to the fineness number
• Match it against the list of assay office marks
• Verify it matches the location where you bought it
• Mismatched symbol = potential counterfeit

Step 4: Identify the HUID Code

• Look for a 6-character alphanumeric code (like H47K28)
• Make note of the exact code
• This is your unique verification code

Step 5: Verify the HUID Online

• Download BIS Care app (free, available on iOS & Android)
• Enter the HUID code in the verification section
• App will display: jewelry details, assay office, verification date
• If code exists = piece is genuine; if not = likely counterfeit

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How to Verify HUID Online: Complete Tutorial

Method 1: BIS Care App (Recommended)

Step-by-step:

1. Download "BIS Care" app from Apple App Store or Google Play

2. Open app and select "Verify Hallmark"

3. Enter the 6-digit HUID code (example: H47K28)

4. Enter the fineness (916, 750, etc.)

5. Enter the assay office city (Delhi, Mumbai, etc.)

6. Click "Verify"

7. App will show: "Hallmark Found" or "Hallmark Not Found"

What you'll see if genuine:

• Piece details (metal type, purity)
• Assay office that certified it
• Certification date
• Jeweler who submitted for hallmarking

What you'll see if fake:

• "Hallmark Not Found"
• No details displayed
• No certification information

Method 2: BIS Website Verification

Step-by-step:

1. Visit bis.gov.in/hallmarking

2. Select your state

3. Click "Verify Hallmark"

4. Enter HUID code

5. Enter fineness and city

6. System will confirm or deny

Method 3: Visit Authorized Assay Center

In-person verification:

1. Locate nearest BIS assay center (on bis.gov.in)

2. Visit with your jewelry and receipt

3. Request HUID verification

4. Center staff will verify using official records

5. Get written verification certificate

Cost: Free or ₹50-100 (varies by center)

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How to Spot Counterfeit Hallmarks: 10 Red Flags

Red Flag #1: Blurry or Unclear Marks

What it looks like: Symbols are fuzzy, smudged, or hard to read even with magnification Why it's fake: Genuine hallmarks are crisp and clear (laser-marked). Blurry marks indicate someone tried to copy them post-purchase. How to test: Use 10x magnifying glass. Genuine marks should have sharp, clean edges. Counterfeit marks look hand-stamped or photocopied.

Red Flag #2: HUID Code Doesn't Match Assay Office

What it looks like:

• HUID code starts with "H47" (Delhi)
• But assay office symbol is Mumbai's horse
• You bought jewelry in Bangalore

Why it's fake: Each HUID code is tied to a specific assay office. Mismatches indicate the hallmark was stolen/copied from another piece. How to verify: Cross-reference your HUID first digit with assay office:

• H27-H49 = Delhi
• H50-H79 = Mumbai
• H80-H99 = Chennai
• (Ask jeweler for full code list)

Red Flag #3: No HUID Code At All

What it looks like: You find fineness mark (916) and assay office symbol, but no 6-digit code Why it's fake: Since 2023, ALL new hallmarked pieces MUST have HUID. Absence of HUID code on "new" jewelry = either:

• Piece is actually old (pre-2023), or
• Piece is counterfeit with partial hallmark

Red flag context: If seller claims it's "brand new," insist on HUID.

Red Flag #4: Hallmark Doesn't Match Receipt

What it looks like:

• Receipt says "916 purity"
• Hallmark on jewelry says "750"
• Assay office symbol doesn't match where you bought it

Why it's fake: Jewelers would be committing federal crimes to do this. If hallmark doesn't match receipt, one of them is fake. Action: Immediately report to BIS and local police. Request refund.

Red Flag #5: Too Many Hallmark Symbols

What it looks like: Jewelry has 4, 5, or 6 hallmark-looking symbols Why it's fake: Official BIS hallmark has exactly 3 symbols: fineness, assay office, HUID. Additional marks are either:

• Jeweler's personal marks (should be separate from hallmark), or
• Fake duplication of symbols

Rule: Only 3 official hallmark symbols should exist. Anything more is suspicious.

Red Flag #6: Hallmark Location Doesn't Match Type

What it looks like:

• Ring with hallmark on outer surface (visible to everyone)
• Official hallmarks should be inner side

Why it's suspicious: Official hallmarks are intentionally hidden inside/on back to prevent copying. Visible marks from far away = likely fake.

Red Flag #7: Hallmark Wears Off Easily

What it looks like: You rub jewelry and the hallmark comes off or fades Why it's fake: Genuine laser-marked hallmarks are permanent. They're engraved into the metal. If marks fade from gentle rubbing, they were applied post-purchase using paint, sticker, or soft marking—all counterfeiting techniques. Test: Gently rub marked area with soft cloth. Genuine marks don't fade.

Red Flag #8: HUID Code Doesn't Verify Online

What it looks like:

• You enter HUID code H47K28 in BIS Care app
• App says "Hallmark Not Found"
• Piece has the exact same code marked on it

Why it's fake: Either:

1. Code is fake (someone copied legitimate code)

2. Code doesn't exist (made-up code)

3. Piece is a duplicate (counterfeiters copy legitimate hallmarks)

Action: Request refund immediately. Save the piece as evidence.

Red Flag #9: Jeweler Can't/Won't Verify HUID

What it looks like: You ask jeweler to verify HUID using BIS Care app, and they:

• Refuse
• Say "it's not necessary"
• Say "our hallmark is enough"
• Delay or make excuses

Why it's suspicious: Legitimate jewelers WANT to verify. They have nothing to hide. Refusal is a major red flag.

Red Flag #10: Hallmark Symbols Are Hand-Stamped (Not Laser-Marked)

What it looks like: Hallmark symbols look like they were stamped with metal dies, not laser-engraved How to tell the difference:

• Laser-marked: Extremely precise, micro-thin lines, permanently engraved
• Hand-stamped: Slightly imperfect, slightly thicker lines, can wear off

Why it matters: Official hallmarks since 2023 are ALL laser-marked. Hand-stamped marks = either very old pre-2023 jewelry, or counterfeit.

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Common Hallmark Myths: What's TRUE and What's FALSE

MYTH #1: "If jewelry is expensive, it must be hallmarked"

TRUTH: No. Price doesn't correlate with hallmarking. A ₹50,000 piece can be unhallmarked; a ₹5,000 piece can be hallmarked. Only verification matters.

MYTH #2: "Hallmarks can never be faked"

TRUTH: False. Hallmarks CAN be forged, though with more difficulty after 2023's HUID system. Always verify HUID online.

MYTH #3: "Old jewelry before 2023 is worthless because it has no HUID"

TRUTH: False. Pre-2023 hallmarked jewelry is still valid. HUID is only mandatory for pieces hallmarked after June 2023.

MYTH #4: "Hallmark guarantee means the jeweler promises purity"

TRUTH: No. Hallmark is a BIS guarantee, not a jeweler guarantee. Jeweler's guarantee is separate (usually 30 days to return/exchange if purity is different).

MYTH #5: "Once hallmarked, jewelry can never be melted or modified"

TRUTH: False. You can melt, modify, or redesign hallmarked jewelry. The hallmark just proves original purity.

MYTH #6: "All gold jewelry is hallmarkable"

TRUTH: Only gold jewelry with 750+ purity can be hallmarked. Gold below 75% gold content doesn't meet official standards.

MYTH #7: "Hallmark on jewelry means I don't need to verify it"

TRUTH: Wrong. Always verify the HUID. Hallmarks can be forged. Online verification is your proof.

MYTH #8: "I can hallmark any old jewelry at home"

TRUTH: False. Only authorized BIS assay centers can hallmark. DIY hallmarking is illegal.

MYTH #9: "Hallmark increases jewelry value"

TRUTH: Partially true. Hallmark proves purity, which increases resale value. But the mark itself doesn't add monetary value.

MYTH #10: "All jewelers offer free hallmarking"

TRUTH: Most do (cost absorbed in making charges), but some charge ₹50-200 per piece. Ask upfront.

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What to Do If Your Jewelry Doesn't Have a Hallmark

Scenario 1: Old Jewelry (Pre-2023)

If your jewelry was purchased before June 2023 and lacks a hallmark:

• It's NOT fake. Hallmarking was optional then.
• Get it verified anyway. Visit a BIS assay center for voluntary hallmarking. Cost: ₹50-200 per piece.
• Benefit of voluntary hallmarking: Increases resale value, proves purity, ensures peace of mind.

Scenario 2: Heritage/Heirloom Jewelry

If jewelry has been in your family for generations:

• Don't worry. Heirlooms don't need hallmarking for authenticity.
• Optional: Get assessed by a jeweler or gemologist.
• For selling: Get voluntary hallmarking before selling to increase buyer confidence.

Scenario 3: Jewelry Purchased After June 2023 Without Hallmark

If you bought jewelry after mandatory hallmarking began and it lacks hallmark:

• RED FLAG. Jeweler violated law.
• Action: Demand refund or request immediate hallmarking at BIS center.
• Report to BIS: File complaint on bis.gov.in if jeweler refuses.

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FAQ: Your Hallmark Verification Questions

Q1: What if my HUID code doesn't work in the BIS Care app?

A: First, check if you entered it correctly (case-sensitive). If still doesn't work: piece might be counterfeit or code might be damaged. Visit nearest BIS assay center for manual verification.

Q2: Can I hallmark jewelry at home?

A: No. Only authorized BIS assay centers can hallmark. DIY hallmarking is illegal and punishable by law.

Q3: Does hallmark guarantee the jeweler will take it back?

A: No. Hallmark is a purity guarantee, not an exchange guarantee. Jeweler's exchange policy is separate. Confirm it at purchase time.

Q4: If I get hallmarking done after purchase, is it valid?

A: Yes. Post-purchase hallmarking is called "voluntary hallmarking." It proves current purity and increases resale value. Cost: ₹50-200 per piece.

Q5: Can hallmark symbols wear off over time?

A: Laser-marked hallmarks (post-2023) are permanent. Old hand-stamped marks might fade slightly with heavy wear, but laser marks won't.

Q6: What if the HUID code on jewelry doesn't match the one on receipt?

A: This is a red flag. Demand explanation from jeweler. Each piece gets ONE unique HUID. Mismatches indicate fraud.

Q7: Is hallmarking mandatory when buying gold coins?

A: Yes, as of 2023. All coins ≥999 purity should be hallmarked. Insist on HUID verification.

Q8: Can I verify old hallmarks (pre-HUID system) online?

A: Pre-2023 hallmarks had no HUID codes, so online verification isn't available. Visit BIS assay center for manual verification.

Q9: What's the punishment for selling unhallmarked jewelry?

A: ₹5 lakh fine + imprisonment up to 2 years. Report unhallmarked sales to BIS.

Q10: Does hallmark ensure the jewelry won't break or damage?

A: No. Hallmark only guarantees purity. It doesn't guarantee durability, craftsmanship, or longevity. That's the jeweler's responsibility.

Q11: Can hallmark be transferred if I gift jewelry?

A: No. Hallmark is on that specific piece and proves its history. When you gift it, the hallmark remains—it's proof to the receiver that it's genuine.

Q12: What if I bought hallmarked jewelry from an unauthorized seller?

A: If hallmark is genuine (can verify HUID), it's valid jewelry. However, buying from unauthorized sellers carries risk. Always buy from authorized jewelers.

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Conclusion: Your Hallmark Protection Checklist

With mandatory hallmarking, your protection as a gold buyer has never been stronger. But you must take these steps:

✅ Always inspect marks (use magnifying glass, good lighting)

✅ Always verify HUID (use BIS Care app within 24 hours of purchase)

✅ Always check location (hallmark location matches jewelry type)

✅ Always compare with receipt (receipt purity matches hallmark)

✅ Always spot-check (when picking up jewelry, verify marks exist)

✅ Always ask questions (if marks are unclear, ask jeweler to explain)

✅ Always report fakes (file BIS complaint if fraud is suspected)

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Want to verify a hallmark right now? → Download BIS Care App Need to find an authorized assay center? → Find BIS Assay Centers Near You Have a hallmark concern? → File BIS Complaint

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This guide is regularly updated as BIS regulations evolve. Last updated April 2026. Bookmark for future reference.