Home | Whitepaper | Gameplay | Avatars | Racehorses | Land Silks Delivery Passes are your ticket to take ownership of one of this year’s crop of yearling racehorses that are scheduled to start their racing careers this Spring. A Series 1 Delivery Pass is an unrevealed random racehorse in the Series 1 collection from this year’s crop of registered thoroughbred racehorses. Series 1 horses represent horses sold at the top auctions in the United States.