Online Stamp Appraisal Service: What You Actually Get

An online stamp appraisal service can tell you roughly what a stamp is, roughly what it is worth, and whether it deserves a closer look — it cannot certify that a valuable stamp is genuine, and it will not turn an ordinary stamp into a rare one. Treat it as a sorting tool, not a verdict.

Most people who search for this are sitting with an album, a box, or a handful of loose stamps from a relative, and want to know whether any of it is worth the trouble of a formal sale. An online service is often the right first step. What matters is understanding what it can actually do before you send off photos or pay a fee.

What does an online appraisal service actually do?

At the lower end, a free tool matches your stamp against a database using the country, year, design, and colour, and returns a catalogue number and a rough value range. At the higher end, a paid service has an actual person — often a dealer or experienced collector — look at your photos and give you a written opinion on identification, condition, and likely value.

Neither replaces physical inspection. A stamp that looks fine in a photo can have a thin, a repaired tear, or regummed back that only shows up under raking light or against a strong lamp. Photos also can't reliably show watermarks, which matter a great deal on classic issues, or subtle colour and paper differences that separate a common stamp from a scarce one with the same design. Our guide to free stamp appraisal goes through what these no-cost tools are actually good for.

How much should I expect to pay?

Pricing varies a lot by what you're actually asking for. A basic identification and rough value estimate is often free, or close to it — some dealers will do this for nothing in the hope of a future sale. A single formal certificate of authenticity from a recognized expertising body is a different order of cost, typically charged per stamp, and it only makes financial sense once your research suggests the stamp clears a meaningful value threshold, not for routine material.

For comparison, a stamp catalogued at a modest sum — say the kind of stamp Stanley Gibbons or Scott lists around a token amount like £5 — is not worth paying for a certificate on. The fee alone would exceed anything you could recover from selling it. Certificates exist for the stamps where getting it wrong is expensive, not for the bulk of an ordinary album.

Can an online service tell me if a stamp is genuine?

This is the limit most people run into. Some of the most famous rarities in philately — the Inverted Jenny, the Z Grill, the Plate 77 shades on certain classic issues — are also among the most forged, tampered with, or misidentified. A regummed stamp, a reperforated stamp, or a repaired tear can look convincing in a photo and only reveal itself under magnification, transmitted light, or expert handling.

For that level of certainty, you need a physical expertising service, not a photo-based one. In the United States, the Philatelic Foundation and the American Philatelic Society's APEX service examine stamps in hand and issue certificates addressing genuineness, alterations, and repairs. An online appraisal can tell you that a stamp resembles a famous rarity closely enough to be worth this step. It cannot replace the step itself.

What should I send an online appraisal service?

• A clear photo of the front, taken in even light without flash glare.
• A clear photo of the back, showing gum condition or cancel and any hinge marks.
• A close-up of the perforations on all four sides, since perforation gauge often separates one catalogue number from another.
• Any identifying detail you already have — country, approximate year, and catalogue number if you've found one.

Vague or blurry photos produce vague answers. The single biggest improvement most people can make is better lighting and a flatbed scan instead of a phone photo taken at an angle.

How does this fit with catalogue values?

An online appraisal will usually cite a catalogue — Scott, Stanley Gibbons, Michel, or Yvert & Tellier depending on the country — and quote a number from it. That number is a reference point for a stamp in a specific grade, not a price anyone is guaranteed to pay. Our stamp value calculator guide covers this gap in more detail: catalogue value tells you which stamps deserve attention, and real-world sale prices tell you what buyers actually pay for that exact grade and condition.

If the appraisal service is doing its job well, it will explain this distinction rather than simply repeating a catalogue figure as if it were a quote. Be wary of any service that gives you a single confident number with no mention of condition, since condition is what decides the price more than almost anything else. Our guide to stamp condition and grading walks through the physical checks that separate a stamp worth pursuing from one that isn't.

When is it worth paying for a full appraisal?

If a free or low-cost online check suggests you might be holding something scarce — an early issue, a known error, or a stamp that resembles one of the handful of famous rarities — that is the point to consider paying for a proper written appraisal or a certificate. Below that threshold, the fee usually costs more than the stamp is worth, and a free identification is enough to confirm there's nothing further to chase. For a whole album or an inherited collection, the better first move is usually not appraising stamp by stamp but getting a sense of the whole. Our guides on valuing a whole album or box and on inherited stamp collections explain how to triage a large accumulation before spending money on individual appraisals.

What's the realistic outcome?

Most collections, run through an online appraisal, come back with the answer most people don't want to hear: modest value, spread thin across many pages, with one or two stamps carrying most of whatever the collection is worth. That's a useful answer. It tells you where to spend your remaining time and money — on the few stamps that matter — rather than paying for certificates across an entire album on the hope that age alone made something valuable. It rarely does, and our piece on why age is the weakest signal explains why in more detail.

Common questions

Is an online stamp appraisal service accurate?

For quick identification and a rough value range, yes, especially when photos are clear and the stamp is common. For anything scarce or high value, an online estimate is a starting point, not a final answer, because condition and authenticity often need to be checked in hand.

How much does a real stamp appraisal cost?

A basic identification from a dealer is often free. A formal expertising certificate from a body like the Philatelic Foundation or the APS costs a fee per stamp, which only makes sense once the stamp's likely value clears a reasonable threshold.

What does an online appraisal service need from me?

Sharp photos of the front and back, in good light, with the perforations and any watermark visible. Most services also want the country, approximate date, and catalogue number if you already have one.

Can an online service tell me if my stamp is a fake?

A basic online appraisal can flag an obvious problem, but confirming authenticity on a stamp that is a known target for forgery usually requires physical examination by an expertising body, not a photo review.