About PSG
PSG provides professional stamp grading service. PSG has been the industry standard for the authentication and grading of rare stamps.
Traditional certificates only addressed authenticity since that is all that concerned collectors. Digital stamp grading and authentication emerged as a solution to rampant counterfeiting and stamp doctoring in the collectible stamp industry, especially for the expensive stamps. With decades of experience, PSG experts are drawn from the best in philately. Our team of renowned experts in their specific collection, including classic and modern China and U.S. stamps, PSG has built the most trusted brand in stamp grading and authentication. Backed by the PSG guarantee and tracked through the PSG cert verification database PSG stamps are the most secure, most reliable, and highest valued stamps in the market.
PSG pioneered the tamper-evident, sonically sealed, high security method of stamp encapsulation to allow for safe storage and peace of mind. The addition of the PSG high-resolution photo service has created the perfect way to display stamps both in your home and stamp shows.
Whether you are a freshman, a senior collector, dealer, or investor, PSG ensures maximum security, value, and liquidity through our grading service. PSG is the leader of digital stamp grading service and is your best friend.