James Spence Authentication Is Coming Back To Dave & Adam’s! James Spence Authentication (JSA) is one of the leaders of autograph authentication. JSA experts will be in-store Saturday, May 11th from 11:00am to 4:00pm. During those times, you can bring your items directly to the store for authentication. Customers are more than welcome to drop off their items starting Friday, May 10th. Visit the JSA Fees Page to see how much it will cost to authenticate your item. If you are unable to make it either day, JSA will also be taking drop-off submissions which will