The global counterfeit goods market is estimated at $4.2 trillion by 2026, according to the OECD and EUIPO. From fake pharmaceuticals that endanger lives to counterfeit electronics that catch fire, counterfeit products are not just a financial loss — they are a safety hazard. This guide covers how to verify product authenticity across major categories before and after purchase.
Bought from a suspicious store? Check the seller's website at IsThisAScam.to — if the store is fake, the products are certainly counterfeit.
Universal Authentication Methods
Serial Number Verification
Most branded products have serial numbers or model numbers that can be verified through the manufacturer's website. After purchase, locate the serial number on the product or packaging and enter it on the brand's official verification page. If the number is not recognized, the product is counterfeit.
QR Code and NFC Authentication
Many brands now embed QR codes or NFC chips in packaging that link to authentication pages. Nike, Louis Vuitton, and pharmaceutical companies use these systems. Scan the code with your phone — it should lead to the brand's official domain showing authentication details. A code that leads to an unknown domain, shows no result, or does not exist is a failure.
Packaging Quality
Examine packaging with these specific checks:
- Print quality: Blurry logos, inconsistent fonts, color variations from the brand's standard
- Material quality: Flimsy cardboard, cheap plastic wrap, missing protective inserts
- Spelling and grammar: Errors on packaging from major brands are extremely rare and indicate counterfeits
- Barcodes: Scan the barcode with a barcode reader app. It should match the product. A barcode that does not scan or returns a different product is a red flag.
- Weight: Counterfeit packaging is often lighter than genuine. Compare with the official product weight if available.
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Category-Specific Guides
Electronics (Apple, Samsung, Sony)
- Apple: Enter the serial number at checkcoverage.apple.com. Every genuine Apple product has a verifiable serial number. Also check the box matches the device serial number.
- Samsung: Use the Samsung Members app to verify device authenticity. The IMEI (dial *#06#) should match Samsung's database.
- General electronics: Compare the weight, screen quality, and build materials with official specifications. Counterfeit phones often have lower screen resolution, shorter battery life, and cheaper plastics than the genuine product.
Luxury Goods (Handbags, Watches, Clothing)
- Stitching: Genuine luxury goods have impeccable, consistent stitching. Uneven stitches, loose threads, or color variations in thread indicate counterfeits.
- Hardware: Zippers, clasps, and buckles on genuine items are heavy, precisely made, and branded. Counterfeit hardware is often lighter, unevenly finished, or uses incorrect logos.
- Authentication services: Services like Entrupy (for handbags), Real Authentication, and Legit Check use AI and expert analysis to verify luxury items. Costs range from $10-50 per item.
- Luxury watches: Verify with the manufacturer using the serial number. Have the watch examined by an authorized dealer. Weight is a strong indicator — genuine Rolex watches are noticeably heavier than counterfeits due to precious metal content.
Pharmaceuticals and Supplements
Counterfeit medicines are a life-threatening issue. The WHO estimates 1 in 10 medical products in low and middle-income countries is substandard or falsified.
- Buy only from licensed pharmacies
- Check for the FDA's National Drug Code (NDC) on the packaging
- Verify the pharmacy at nabp.pharmacy (National Association of Boards of Pharmacy)
- Online pharmacies should display the VIPPS (Verified Internet Pharmacy Practice Sites) seal
- Never buy prescription drugs from unverified online sources, regardless of price
Sneakers and Streetwear
Sneaker counterfeiting is a massive industry. Verification steps:
- Check the SKU on the box matches the product on Nike.com, Adidas.com, etc.
- Compare the shoe to official product photos for color accuracy, logo placement, and material texture
- Use authentication apps like CheckCheck or Legit Check, which use photo AI to compare your product against known genuine examples
- Examine the insole font, box label quality, and stitching patterns
Where Counterfeits Are Most Commonly Sold
- Social media ads: Facebook and Instagram ads for luxury goods at deep discounts frequently lead to counterfeit sellers
- Third-party marketplace sellers: Amazon, eBay, and Walmart marketplace have ongoing counterfeit problems from third-party sellers. Buy "Sold by and Shipped from [brand]" when possible.
- Unauthorized websites: Any site not listed as an authorized retailer by the brand. Check the brand's website for a list of authorized sellers.
- Street markets and pop-up shops: Physical counterfeit sales still thrive in tourist areas and flea markets
What to Do If You Received a Counterfeit
- Document everything: Photos of the product, packaging, and any serial numbers
- Request a refund: Through the marketplace (Amazon A-to-Z Guarantee, eBay Money Back Guarantee) or via credit card chargeback
- Report to the brand: Most major brands have IP enforcement teams that want to know about counterfeit sellers
- Report to the platform: Marketplaces have counterfeit reporting mechanisms
- Report to authorities: The National Intellectual Property Rights Coordination Center (iprcenter.gov) handles counterfeit complaints in the U.S.
The best defense is buying from verified, legitimate sellers. Check any unfamiliar store with IsThisAScam's 6-layer analysis before purchasing. See also: verifying online stores and website safety checks.
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