Post Malone Signed Autographed Stoney LP Album Cover Photo. This licensed Photo has been signed by Post Malone. The autograph has been certified authentic by PSA/DNA and comes with their authentication sticker and matching certificate of authenticity that can be verified online. PSA/DNA is the leading third-party authenticator in the autograph industry. This signed Photo is a great gift idea for any Entertainer fan or memorabilia collector. Commemorate the great career of Post Malone with this Photo and check out other memorabilia at Prime One Sports.com.