Stamp Appraisal Scams to Avoid

The stamp appraisal scams to avoid are rarely about someone walking off with your stamps; they are about a number — inflated or deflated — pointed in a direction that benefits whoever is giving it, not you. Most of the damage comes from ordinary self-interest dressed up as expertise, not outright fraud.

That self-interest shows up in a handful of repeating forms: a free "appraisal" that doubles as a sales pitch, a paid service charging for an opinion nobody can check, a certificate that looks official but traces back to no one, and a dealer's offer presented as independent expert advice rather than a trade price. Knowing the shape of each one is most of the protection you need.

Is a free stamp appraisal secretly a sales pitch?

A free appraisal is not automatically a scam. Plenty of dealers and club volunteers give honest verbal opinions at no charge, because it is how they find material worth buying. The problem starts when the person giving the free opinion is also the only buyer in the room. If a figure is quoted and immediately followed by an offer to buy at a lower number "to save you the trouble of shipping it," that is not an appraisal — it is an opening bid wearing an appraisal's clothes.

The same caution applies when a free appraisal exists mainly as a funnel: a low estimate that conveniently resolves into "send it in for a full written appraisal, for a fee." Our guide to free stamp appraisal covers what a genuine no-cost opinion can actually tell you, and where its limits are.

How does the upfront-fee appraisal scam work?

This one is simple and old. A fee is charged for a written appraisal, the document comes back with an inflated figure and no real market evidence behind it, and the fee itself — not the accuracy of the number — was the actual product. It shows up most often around inherited collections, where the owner has no baseline to judge the figure against and is looking for reassurance rather than a second opinion.

A legitimate paid appraisal costs money because real work goes into it: identifying catalogue numbers, checking perforation and watermark details, grading condition honestly, and citing comparable sold prices rather than asking prices. A legitimate local club appraisal day, by contrast, is usually priced as a token amount — £5 is a typical charge for a walk-in session covering a handful of items — precisely because the volunteer is not trying to extract a fee for the opinion itself. If a stranger quotes a price well beyond that for a quick look at a modest box of stamps, ask exactly what the fee is paying for. Our piece on whether it's worth getting stamps appraised walks through when a paid appraisal earns its cost, and when it does not.

Can a stamp certificate of authenticity be faked?

Yes, and this is the scam that costs the most per incident, because a convincing certificate changes how a stamp is priced and sold. A genuine certificate comes from a body with real expertise and a reputation to protect. In the United States that means the Philatelic Foundation or the American Philatelic Society's APEX service. Other countries have their own recognised bodies; a seller claiming French expertise, for example, should be able to point to organisations such as the Chambre syndicale française des négociants et experts en philatélie, the CNEP, or the Fédération française des associations philatéliques (FFAP) — not a certificate the seller printed themselves.

Famous rarities are the usual target, because the name alone does most of the selling. An ordinary stamp claimed to be an Inverted Jenny, a Z Grill, or a Plate 77 penny red, accompanied by a certificate nobody can trace back to an actual expertising body, should be treated as unverified no matter how official the paper looks. The same caution applies to heavily reproduced classic issues such as France's Cérès, Sage, Semeuse and Marianne designs. Our guides to the most valuable US stamps and valuable British stamps describe what the genuine versions actually look like, which is the first real defence against a fake certificate.

A related, quieter version of the same trick is quoting a listing from Scott, Michel, Stanley Gibbons, Yvert & Tellier, or Dallay as though the catalogue number by itself proves the value, rather than being the reference point it actually is. Our explainer on why a stamp sells for less than catalogue price covers why citing a catalogue number alone proves nothing about what a buyer will pay.

Is a lowball dealer offer a scam, or just business?

Not every disappointing number is a scam. Dealers buy to resell at a margin, so a modest trade offer on common material is normal commerce, not dishonesty. The line gets crossed when that trade offer is presented as an independent opinion of true value, aimed at someone with no way to check it. If a buyer tells you a stamp "isn't worth much" and then lists it for several times that figure the same week, that is not an appraisal failing — it is the business model working as intended, just without the disclosure a fair transaction should include.

The defence is the same either way: get a second opinion before accepting a first number, especially on anything that might be scarce. Our guide to negotiating with a stamp dealer covers how to tell a fair trade offer from an exploitative one, and how to choose a stamp auction house explains how a competitive sale removes a single buyer's incentive to lowball you in the first place.

What are the warning signs of an appraisal scam?

• Urgency. Pressure to decide, ship, or sign today. A fair appraisal and a fair offer both survive a week of thinking it over.
• No comparables. A written appraisal that states a figure without pointing to recent sold prices of a matching catalogue number and grade is an opinion, not an appraisal.
• The appraiser is also the only buyer. An independent opinion and a purchase offer should come from different interests, even if they come from the same honest person.
• A certificate with no traceable issuer. If you cannot confirm who issued it, treat it as unconfirmed.
• A fee out of proportion to the material. A modest box of common stamps does not need an expensive written appraisal to establish that it is modest.

How do you avoid getting scammed when appraising stamps?

1. Separate the opinion from the offer. Ask for a value first, in writing if possible, before any purchase discussion starts.
2. Get more than one opinion on anything that looks like it might be scarce, before accepting the first number you hear.
3. Check who stands behind any certificate rather than accepting its appearance at face value.
4. Treat urgency as a signal, not a reason to act faster. A legitimate buyer or appraiser does not need you to decide immediately.
5. Match the fee to the service. A token charge for a volunteer's quick look is normal; a large fee for the same quick look is not.

None of this requires suspicion of everyone offering to look at your stamps — most dealers, club volunteers, and expertising bodies are exactly what they claim to be, and a sensible opinion costs little or nothing to obtain. If you are starting from an inherited box with no idea what is in it, our guide to inheriting a stamp collection is a better first step than any single appraisal, free or paid, because it tells you what to sort out before you let anyone put a number on it.

Common questions

What is the most common stamp appraisal scam?

The most common pattern is not theft but a number pointed in the wrong direction: a free verbal appraisal that doubles as a low purchase offer from the same person, or a paid written appraisal that inflates value with no comparable sales behind it. Both exploit the fact that the owner has no baseline to check the figure against.

Is a free stamp appraisal ever a scam?

Not automatically. Many clubs and dealers give free opinions honestly because it helps them find material worth buying. It becomes a problem when the person giving the free estimate is also the only buyer in the room, or when the estimate exists mainly to steer you toward a paid follow-up service.

How can I tell if a stamp certificate is fake?

Check whether it was actually issued by a recognised expertising body, such as the Philatelic Foundation or the American Philatelic Society's APEX service in the United States, rather than printed by the seller. A certificate that cannot be traced back to a real body is unverified, regardless of how official it looks.

Should I pay an upfront fee for a stamp appraisal?

A reasonable fee for a genuine written appraisal — for insurance or probate, say — is normal, because real research goes into it. Be cautious of fees charged for a quick opinion with no comparable sales cited, especially when pitched aggressively after an inheritance.

Is a low offer from a dealer the same as an appraisal scam?

No. Dealers buy to resell at a margin, so a modest trade offer on common material is ordinary business, not a scam. It crosses the line only when that trade offer is presented as an independent expert valuation rather than what it actually is.