ASG Introduces New Holders in Exclusive Collaboration with He Zi She

ASG Introduces New Holders in Exclusive Collaboration with He Zi She

The ASG Midsize and Sheet Holders allow for greater accommodation of stamp sizes than ever before. Learn more >

ASG Announces Free Online Tool to Verify Certification

ASG Announces Free Online Tool to Verify Certification

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

Learn about the ASG Grading Scale

Learn about the ASG Grading Scale

ASG grades stamps according to an internationally accepted grading scale of 1 to 100. Learn more >

ASG Grades 1980 China 8 Fen Year of the Monkey Stamps

ASG Grades 1980 China 8 Fen Year of the Monkey Stamps

Behind this famous Chinese Stamp, there is a hidden story about an artist and his monkey. Learn more >

NGC, NCS, PMG and ASG Appoint SP Advance an Official Submission Center

NGC, NCS, PMG and ASG Appoint SP Advance an Official Submission Center

The well-known numismatic company in Selangor, Malaysia, has been an Authorized Dealer since 2016. Learn more >

An expert and impartial stamp grading service from the people behind NGC, PMG and CGC. Subscribe for updates >

Verify ASG Certification

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What is ASG Certification Verification?

This tool can help you to verify that your ASG holder is genuine and has not been tampered with. It can also be a useful starting point to research your ASG-certified stamp.

Instructions

Enter a stamp's ASG certification number (circled in the image) to confirm its description and grade in ASG's database and, if available, view the images of the stamp taken by ASG.

Stamps We Grade

View the full listing of stamps we grade.

Learn more >

How to Submit

Learn how to submit stamps to ASG for expert authentications and grading.

Learn more >

Services & Fees

View the grading tiers and services available for stamps.

View Services & Fees >