ASG Announces Free Online Tool to Verify Certification

Posted on 11/19/2020

The quick, easy and free way to verify and view any ASG-certified stamp is available now!

Authenticated Stamp Guaranty® (ASG®®) has certified more than 100,000 stamps since the company was founded in 2017. To help collectors verify and view the many ASG-certified stamps in the marketplace, ASG has now launched a free Verify ASG Certification tool that can be accessed anytime, anywhere on computers and smartphones.

With this free online tool, users can verify the certification and grade of any stamp in an ASG holder. The tool also displays images of virtually every ASG-certified stamp, allowing users to compare a holdered stamp in hand with the online image to check that it is authentic and has not been tampered with.

To use the Verify ASG Certification tool, go to Then, enter a stamp’s ASG certification number and grade to access its description, ASG grade and images. (The hyphen in the certification number does not need to be entered.)

Click image to enlarge.

The Verify ASG Certification tool is available around-the-clock from anywhere in the world, in both English and Chinese. If ASG is aware of a potential problem with an ASG-certified stamp or its holder, the search result will include an alert.

This helpful online tool is just one of many ways that ASG certification is making the stamp collecting world safer and more vibrant. Stamps certified by ASG are encapsulated in tamper-evident, crystal clear holders with a label featuring the stamp’s description, ASG grade, a unique ASG certification number and a barcode. ASG-certified stamps are backed by the comprehensive ASG Guarantee for as long as they remain in the ASG holder.

ASG is part of the Certified Collectibles Group® (CCG®), which comprises the world’s largest and leading services for grading coins, tokens and medals (Numismatic Guaranty Corporation®), banknotes (Paper Money Guaranty®) and comic books, magazines, trading cards and similar collectibles (Certified Guaranty Company® ). To develop its Verify ASG Certification tool, ASG leveraged the longstanding success of similar resources available through each of these affiliates.

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