James Spence Authentication Returns to Dave & Adam’s! James Spence Authentication (JSA) is returning to Dave & Adam’s for one day only! Don’t miss your chance to have your autographed items authenticated by one of the most trusted names in the industry. Bring your autographed memorabilia directly to the store during the event, or drop off your items starting Friday, August 21st for review. JSA will be in-store for ONE DAY only: Saturday, August 22nd | 11:00am – 5:00pm JSA will accept submissions for autograph authentication starting at $25. Click here to complete and print your online submission form in advance of the event.