An EDI term referring to a transaction set (ANSI 856) where the supplier sends out a notification to interested parties that a shipment is now outbound in the supply chain. This notification is list transmitted to a customer or consignor designating items shipped. The ASN may also include the expected time of arrival.

Detailed shipment information transmitted to a customer or consignee in advance of delivery, designating the contents (individual products and quantities of each) and nature of the shipment. May also include carrier and shipment specifics including time of shipment and expected time of arrival. See also: Assumed Receipt.