All autographed lots in the auction are accompanied with a Letter of Authenticity (LOA) and are guaranteed to pass James Spence Authentication (JSA). In addition to our LOA, some of the lots may include a James Spence Auction Letter of Authentication (ALOA), James Spence Certificate of Authenticity (COA), James Spence Letter of Authenticity (LOA), or additional LOA’s from third-party companies such as PSA, Beckett Authentication, Upper Deck Authenticated, Steiner Sports, or Mounted Memories.


If additional authentication is present, it will be noted in the lot description. It should be noted that certain large lots may contain a small number of clubhouse, spurious or autopen signatures that should be considered part of the lot and are non-returnable or refundable in part or in full. ​


Buyer Exclusive Offer

Any lot won in auction may be submitted to James Spence Authentication for Certificate of Authenticity (COA) or Letter of Authenticity (LOA) by SIG Auctions on the buyer's behalf. Any lots won in auction and submitted through SIG Auctions will receive up to a 20% discount over standard submission rates listed at

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