How do I tell if a stamp is genuine or fake?

Updated October 2026 · How we answer

Short answerCompare the stamp's paper, printing, gum, and perforations with trusted catalog images, and use an expert for any stamp that could be worth real money.

Simple Checks You Can Do

Begin with the basics. Genuine stamps usually show crisp printing, clean color, and sharp details in the design. Fakes may look blurry, have colors that seem off, or use paper that feels too thin, thick, or coated in an unusual way.

Check whether the perforations match the issue you are looking at. Some forgeries are created by adding perforations to plain stamps or by altering a cheaper issue. A magnifying glass and good lighting can reveal many of these differences.

  • Compare the design with a catalog image
  • Look for crisp printing and consistent color
  • Check paper feel and thickness
  • Examine perforations for the correct count

When to Ask for Help

If the stamp appears valuable or the differences are subtle, get an expert opinion. Philatelic societies and experienced dealers often offer guidance, and some offer formal certificates. These services usually charge a fee, so weigh the cost against what the stamp could be worth.

Be cautious of unsolicited offers to buy or certify stamps. Scammers sometimes target owners of older collections. Take your time and keep records of any appraisal you receive.

Be aware that some older stamps have been altered by removing a cancellation or repairing a tear. Ask whether any repairs are present and whether they show under magnification. Undisclosed repairs can cause serious disputes when you sell.

Common mistakes

  • Trusting a stamp because the seller says it is rare.
  • Using chemicals or water to test a stamp, which can damage it.
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