PSA / DNA Certification #. PSA/DNA is a state-of-the-art autograph authentication service developed by Professional Sports Authenticator (PSA) of Newport Beach, California. Utilizing a specially synthesized DNA technology provided by DNA Technologies, Inc. PSA/DNA provides legitimacy to autographed collectibles and helps combat the problem of counterfeits. Professional Sports Authenticator (PSA) is the world's largest third-party grading and authentication service.Each signature submitted for autograph authentication is thoroughly examined by the foremost signature expert in the industry. Life long experience, a nationally recognized reputation, the largest exemplary file in the hobby and formal training in the field of Forensic Document Examination combine to offer the most reliable service to identify autograph legitimacy. The opinion of the authenticators at PSA/DNA are respected throughout the hobby and are the authority when it comes to deeming a signature authentic. When you see PSA/DNA you can feel confident that you are receiving a genuine 100% Authentic signature. The item "LAYNE STALEY Signed ALICE IN CHAINS Index Card JSA & Graded PSA/DNA 10 SLABBED" is in sale since Monday, March 23, 2020. This item is in the category "Entertainment Memorabilia\Autographs-Original\Music\Other Orig. The seller is "autographbay" and is located in Texas. This item can be shipped to United States.