Definition
PSA Grading refers to the authentication and grading service provided by Professional Sports Authenticator (PSA), the leading third-party grading company for trading cards, sports memorabilia, and collectibles. PSA assigns a numerical grade (1–10) based on condition, encapsulates the item in a tamper-evident case, and issues a certificate of authenticity. PSA-graded cards command significant price premiums in the collector market.