How do I tell if a foreign coin is counterfeit?
Physical checks
Weigh the coin on a precise scale and compare it with the official specifications for that coin. Measure the diameter and thickness too, since many fakes are slightly off. Listen to the ring when the coin is gently tapped, although this can vary with the metal and design.
Look closely at the details. Fakes often have blurred lettering, soft relief, or incorrect spacing. The edge may show seams, mismatched reeding, or a cast texture that looks different from the real coin.
- Weigh and measure against official specs
- Check the edge for seams or wrong reeding
- Compare lettering and relief with verified images
- Tap the coin and listen for a clear ring
Buying safely
The safest way to buy valuable foreign coins is from established dealers with clear return policies, or through grading services that authenticate coins. Be cautious with high-value listings from unknown sellers who cannot show a provenance.
Compare the seller's photos with verified references, and ask for close-up images of the edge and surface before you pay.
Scam sellers may use the words authentic or verified without showing proof, so ask what documentation comes with the coin. A recognized grading service label is more reliable than a seller's claim.
Common mistakes
- Relying only on a magnet or a quick visual check.
- Trusting a coin because a seller says it is authentic.
