How to Identify Stamps: Free Identification Guide

Stamp identification is the essential first step before you can determine value, organize a collection, or sell. But with stamps issued by over 700 countries and territories over nearly two centuries, identifying an unfamiliar stamp can feel overwhelming. This guide covers the key techniques, tools, and resources that make stamp identification straightforward -- even for complete beginners.

Whether you want to identify stamps by picture using your phone, or learn the manual techniques that expert philatelists use, this guide has you covered.

The Fastest Way: Identify Stamps by Picture with AI

The quickest method to identify any stamp today is using an AI-powered stamp identification app. These apps use image recognition technology trained on millions of stamp images to instantly tell you what stamp you are looking at.

How AI Stamp Identification Works

1. Open the app and point your phone camera at the stamp
2. The AI analyzes the image, comparing it against its database of stamps
3. Within seconds, you receive the country, year, catalog number, and estimated value
4. Review the results and save them to your digital collection

AI identification works best with clear, well-lit photographs taken straight on (not at an angle). For stamps in albums, you do not need to remove them -- just ensure the stamp is fully visible and not obscured by album page edges.

Identifying Stamps by Country

The first step in manual stamp identification is determining which country issued the stamp. Most stamps clearly show the country name, but many do not use the English name, and some do not show a country name at all.

Stamps Without English Country Names

Text on Stamp	Country	Notes
Helvetia	Switzerland	Latin name; used since 1862
Magyar Posta / Magyarorszag	Hungary	Magyar means Hungarian
Nippon	Japan	Japanese name for Japan
Suomi	Finland	Finnish name for Finland
Eire	Ireland	Irish Gaelic name
CCCP / Pochta SSSR	Soviet Union	Cyrillic abbreviation
Shqiperise / Shqiptare	Albania	Albanian language
Poczta Polska	Poland	Polish postal service
Ceska Republika	Czech Republic	Since 1993 split from Czechoslovakia
RF / Republique Francaise	France	French Republic

Stamps with No Country Name

One important rule in philately: Great Britain is the only country that does not put its name on stamps. Instead, British stamps feature a silhouette of the reigning monarch. If you see a stamp with a monarch's profile and no country name, it is almost certainly from the United Kingdom.

Key Physical Features for Identification

Beyond the country name, several physical characteristics help narrow down exactly which stamp you have.

Perforations

Perforations are the small holes punched along the edges of stamps to make them easy to separate. The "perforation gauge" -- the number of holes per 2 centimeters -- is a key identification feature. Stamps that look identical in design but have different perforation measurements may be entirely different catalog listings with different values.

To measure perforations, use a perforation gauge (available cheaply from stamp supply dealers, or use a printable version). Place the stamp on the gauge and find the line where the perforations align perfectly. Common perforation gauges include 10, 11, 12, 13, 14, and 15.

Watermarks

Many stamps, especially those from the British Commonwealth, were printed on watermarked paper. Watermarks are designs pressed into the paper during manufacturing. They are often invisible to the naked eye but can be revealed by placing the stamp face-down on a dark surface or using watermark detection fluid.

Common watermark types include crowns, stars, letters, and geometric patterns. The watermark variety can dramatically affect a stamp's value -- identical-looking stamps with different watermarks may differ in price by 100x.

Paper Types

Stamps have been printed on various paper types throughout history, and the paper itself is an identification feature:

• Wove paper -- smooth, uniform texture (most common)
• Laid paper -- shows parallel lines when held up to light
• Chalky paper -- has a chalk coating that smudges when wet
• Granite paper -- contains colored fibers visible with magnification
• Pelure paper -- thin, translucent paper

Overprints and Surcharges

Overprints are additional text or designs printed on top of an existing stamp. Surcharges change the denomination. Both are common identification features, particularly for stamps from colonies, occupied territories, or countries that revalued their currency. An overprint can transform a common stamp into a rarity.

Understanding Catalog Numbers

Once you identify a stamp, assigning it a catalog number is essential for accurate valuation. The major catalog systems are:

Catalog	Coverage	Used By
Scott	Worldwide	Primarily US/North American collectors
Stanley Gibbons (SG)	Worldwide	British Commonwealth collectors
Michel	Worldwide	European collectors (especially German)
Yvert et Tellier	Worldwide	French-speaking collectors
Sassone	Italy and colonies	Italian collectors

Each catalog assigns its own numbering system. A US stamp might be Scott #1 but also have a different Michel number. When communicating about stamps, always specify which catalog system you are using.

Common Identification Challenges

Challenge 1: Stamps in Non-Latin Scripts

Stamps from China, Japan, Korea, Russia, Greece, and many Middle Eastern countries use non-Latin scripts that can make identification difficult. For these stamps, focus on other features: the denomination (often in Arabic numerals), the design, and any symbols. AI identification apps are particularly useful here, as they can recognize scripts and designs that most collectors cannot read.

Challenge 2: Stamps from Countries That No Longer Exist

Many stamp-issuing entities have been absorbed, renamed, or dissolved. Stamps from places like the Orange Free State, Transjordan, Rhodesia, Czechoslovakia, or the German Democratic Republic can confuse newcomers. Reference guides and online databases list these historical entities and their stamps.

Challenge 3: Revenue Stamps vs. Postage Stamps

Revenue stamps (also called fiscal stamps) were used for tax purposes, not postage. They often look similar to postage stamps but may be inscribed "Revenue," "Internal Revenue," "Duty," or "Tax." Revenue stamps have their own collecting community and valuation system. Do not confuse them with postage stamps when looking up values.

Challenge 4: Cinderellas and Labels

Not everything that looks like a stamp is a government-issued postage stamp. "Cinderellas" include charity labels, exhibition labels, local post stamps, and propaganda labels. These are collectible in their own right but are not listed in standard postage stamp catalogs.

Free Stamp Identification Resources

Beyond AI apps, these resources help with stamp identification:

• StampScan App -- AI-powered identification from photos, available on iOS and Android
• Colnect.com -- free online stamp catalog with images and details for millions of stamps
• StampWorld.com -- comprehensive online catalog organized by country
• Zillions of Stamps -- US stamp identification database
• Reddit r/stamps -- post photos for community identification help
• Scott Catalogue Online -- digital access to the standard US catalog (subscription required)

Step-by-Step Identification Process

Follow this systematic process to identify any stamp:

1. Determine the country. Look for country name inscriptions, monarch portraits, coat of arms, or distinctive language. Use the foreign name reference table above.
2. Note the denomination. The face value helps narrow down the issue period and catalog listing.
3. Examine the design. What is depicted? Portraits, landscapes, commemorative events, and symbols all help place the stamp in time.
4. Check perforations. Measure the perforation gauge using a perf gauge tool. Record whether the stamp is perforated, imperforate, or has a combination.
5. Look for watermarks. Place the stamp face-down on a dark surface. If nothing is visible, try watermark fluid on a watermark tray.
6. Note the color. Exact shade matters -- many stamps were issued in multiple color varieties that are cataloged separately.
7. Check for overprints. Look for any additional printing on top of the original design.
8. Match to a catalog. Using all the features above, search through the appropriate catalog or online database to find an exact match.

Once identified, you can then proceed to determine the value of your stamp using our complete valuation guide, or get a free stamp appraisal online.