NGC, PMG and ASG Appoint Silverhouse an Official Submission Center

NGC, PMG and ASG Appoint Silverhouse an Official Submission Center

The Taiwan-based firm will help collectors and dealers easily access expert collectibles services. Learn more >

ASG-certified Red Revenue Stamp Realizes More than $13,000 at Auction

ASG-certified Red Revenue Stamp Realizes More than $13,000 at Auction

Two other stamps graded by ASG realized over $6,000 each in a John Bull Auctions sale in December. Learn more >

ASG Enhances Grading Scale by Adding ASG VF/XF 88 Grade

ASG Enhances Grading Scale by Adding ASG VF/XF 88 Grade

The new ASG VF/XF 88 grade further differentiates stamps near the top of the ASG grading scale. Learn more >

ASG Celebrates 1 Million Stamps Graded

ASG Celebrates 1 Million Stamps Graded

The third-party certification service is brining greater security to the philatelic marketplace. 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 >

Expert Stamp Grading

For collectors of stamps, ASG provides an accurate, consistent and impartial assessment of authenticity and grade, backed by the comprehensive ASG Guarantee, which protects buyers and sellers. ASG is part of the Certified Collectibles Group, whose mission is to empower collectors with services that ignite passion, create value and build community.

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.