How do I identify a stamp from a photo?
Frame the stamp close-up and flat, then tap the shutter. Postmark sends the photo for AI analysis and returns the issue, a short description, supporting details, an estimated value, and how confident it is.
Is Postmark a professional stamp appraisal?
No. Stamp identifications and value estimates are AI-generated estimates for informational and entertainment purposes only. Postmark is not a certified philatelic expertizing or appraisal service, and a result is not a certificate of authenticity, an expertization, or a professional appraisal. Estimated values are not market guarantees and are not financial or investment advice. Never buy, sell, insure, or declare a stamp based solely on the app's output. Obtain professional expertization for any stamp you believe is valuable.
What does a result tell me?
The issue and a plain-language description, supporting details such as country and era, an estimated value in dollars, a rarity tier, and any cautions the analysis flags. A close-up of a single stamp gives the model the most to work with.
How accurate is the identification?
Every result carries a confidence label of High, Medium, or Low. Accuracy depends on lighting, framing, focus, and how much of the stamp is visible. A photograph cannot reliably verify watermarks, perforations, paper varieties, regumming, repairs, or forgeries. Treat the result as a well-informed starting point, not a verdict.
Does Postmark keep my photos?
No. Photos travel over HTTPS to our backend, which passes them to Google Gemini for analysis and returns the result. They are processed transiently and are not retained by us afterwards. The copy saved with a find stays on your device.
What happens to a stamp after I identify it?
It becomes a page in your album with your photo, its issue, its set, its rarity tier, and its estimated value. Finds earn XP toward ten levels from Letter to Legacy, and feed daily quests, streaks, and badges.
