ASNs are usually sent through an electronic format, also referred to as electronic data information (EDI) 856 or “shipped notice.” These notices provide the customer with extensive detail about their order before it arrives at its destination. ASNs can include detailed information such as order product descriptions, delivery date, country of origin, physical description, type of packaging, transportation/logistics information, and a tracking number. It is essentially the seller’s way of sending an automatic message to the buyer that the product has left their doors and is en route.