Why PSA/DNA? The Advantage of PSA/DNA Authentication Services PSA/DNA Letters of Authenticity are accepted by ALL major auction houses. They include, but are not limited to, Sotheby's, SCP Auctions, Heritage, Legendary, Mile High Card Company, R&R Enterprises and Memory Lane, Inc. Premium Price and Liquidity Because potential buyers feel more comfortable purchasing certified items, PSA/DNA collectibles often sell for premium prices due to the strength and credibility of the PSA/DNA brand. Many of the most valuable collectibles in the world have been certified by PSA/DNA. Confidence Buyers can be confident that PSA/DNA collectibles have been witnessed or examined for authenticity by the world's leading autograph experts. Certified for Life Because PSA/DNA uses an invisible, permanent DNA marker, the authenticity is easily verified. Verification The unique certification number can be used to verify the history of any PSA/DNA Certified item simply by typing in the serial number online. PSA/DNA's covert DNA-laced ink is extremely durable and almost impossible to replicate! The chance of duplicating our DNA strand is 1 in 33 trillion! Recertification is easy! Items with lost certificates or missing labels can be verified. We simply check for the DNA using our specially calibrated laser and issue a new label and certificate!