Transmit an EDI 856 Advance Ship Notice (ASN) to a retail trading partner

Steps

1. Confirm the retailer's specific EDI 856 implementation guide, as each retailer customizes required segments, qualifiers, and carton-labeling requirements beyond the base X12 standard
2. Build the hierarchical loop structure: BSN (beginning segment with shipment ID and date), then HL loops for Shipment > Order > Pack > Item levels, populating TD1 (carrier details), TD5 (routing), and DTM (dates) segments at the shipment level
3. At the Pack level (HL*P), include the SSC carton barcode in the MAN segment; at the Item level (HL*I), populate the LIN segment with the buyer's item number and UPC/EAN
4. Wrap the transaction in a GS/GE functional group and ISA/IEA interchange envelope, using the ISA13 interchange control number unique to this transmission
5. Transmit the EDI file to the retailer via your agreed-upon transport (AS2, SFTP, or VAN) and retain the 997 Functional Acknowledgment they return
6. Map the ASN shipment ID back to your internal order and shipment records so that a 997 rejection can trigger an automated correction workflow