Last verified: 2026-10-24
JSA Authentication at Conventions
JSA Authentication appears at selected US comic and horror conventions for on-site witnessing or mail-in authentication after events. Behind the Table maps which shows use JSA Authentication and how each program is run at the table.
On-site witnessing at major cons; mail-in authentication for signed items.
Official site: https://www.spenceloa.com/jsa/
Which conventions use JSA Authentication on-site—and how fees are handled at the table—is mapped in Behind the Table.