Bo Schembechler Signed 9/14/1985 Michigan Ticket Stub vs Notre Dame PSA 43815 The number in the listing title is just an inventory sku for our records and is not the authentication number. This is the exact item that you will receive so please see pictures for condition. This is a ticket stub that was personally autographed by Bo Schembechler. This has been professionally slabbed by Professional Authentication Services (PSA) and includes a certificate of authenticity from Denver Autographs.