How to Spot Counterfeits Before You Buy or Pawn

Counterfeits flow through the secondhand market in both directions: people unknowingly pawn fakes they were sold, and people buy fakes from listings that looked legitimate. A few minutes of structured checking catches the majority of them. Here's the checklist by category.

Gold and jewelry

Magnet test: real gold and silver are never magnetic. A strong fridge magnet pulling on a "gold" chain ends the conversation. (Passing doesn't prove purity — some fakes use non-magnetic metals.)
Hallmarks: look for karat stamps (10K/14K/18K/585/750) on clasps and inner bands. Then check for the deal-breakers: GP, GF, HGE, or "1/20" markings mean plated or filled, not solid. Our gold guide has the full stamp table.
Wear points: on plated items, edges and high-contact spots show a different metal color underneath. Check clasp edges with a loupe.
Density check: gold is heavy — 19.3 g/cm³. A "gold" bracelet that feels airy for its size is telling you something.

Luxury watches

Weight: genuine luxury watches are dense; fakes are almost always lighter. If you can compare against a known-genuine model, this alone catches most fakes.
The seconds hand: on mechanical Rolexes and similar, it sweeps smoothly (6–8 beats per second). A once-per-second tick on a "Submariner" is a quartz fake. (Careful: some genuine luxury watches are quartz — know the model.)
Details under a loupe: font weight and spacing, even lume application, crisp engraving, and date magnification (a genuine Rolex cyclops magnifies 2.5×; fakes are usually weaker). See the appraiser's checklist in our watch guide.
Serial verification: check that reference and serial numbers exist, match any papers, and are engraved cleanly — acid-etched fuzzy serials are a classic fake tell.

Designer bags and accessories

Stitching: luxury houses stitch straight, even, and dense. Crooked or variable stitching is the most reliable single tell.
Hardware: real hardware is heavy metal with deep, clean engraving; fakes use light alloys with shallow stamping that wears gold-tone quickly.
Date codes and serials: most houses use dated codes in known formats and locations. Look up the format for the specific brand and check it matches the bag's claimed production era.
Smell and feel: real leather has a distinct smell; plastic-smelling "leather" is a strong negative signal.

Electronics

Serial cross-check: enter the serial on the manufacturer's website — fake AirPods and "flagship" phones fail here immediately, or the serial belongs to a different product.
Weight, fit, and finish: counterfeit accessories are lighter, with seams and misaligned ports.
Software check: connect to the official app or system — counterfeits fail pairing verification or report as different hardware.

When to stop testing and pay a professional

Home checks catch bad fakes. They do not reliably catch "superfakes" — high-grade counterfeit watches and bags that fool casual inspection. The rule of thumb: if the item is worth more than $1,000 if genuine, professional authentication (typically $20–100) is cheap insurance — before you buy it, and before you rely on it as loan collateral. You can also photograph an item and run it through our estimator with counterfeit screening enabled; the AI flags visual red flags worth investigating, which is a useful first pass before paying for full authentication.

Frequently asked questions

What happens if I unknowingly try to pawn a fake?

The shop declines it, and that's usually the end. Brokers understand that owners are often victims too. Knowingly presenting a counterfeit as genuine, however, is fraud.

Are pawn shops themselves a safe place to buy?

Safer than private listings for authenticated categories — a shop that guarantees authenticity in writing is staking its license on it. Always ask for the guarantee in writing.

Can AI photo analysis prove authenticity?

No — it can flag red flags and probability, which is valuable for screening, but proof requires physical inspection. Treat any photo-based verdict, including ours, as a first filter rather than a certificate.