The EDI 943 is sent when inventory is transferred between two warehouses or distribution centers operated by the same goods owner or 3PL network. It notifies the receiving DC of incoming stock before it arrives.
W04
Beginning Segment — transfer shipment identification, transfer date
LX
Assigned Number — line item sequence
W01
Item Detail — quantity, unit of measure, UPC, lot/serial number
N1
Name — shipping warehouse and receiving warehouse identification
W27
Carrier Information — SCAC, transport mode, routing
943 → 944 (Warehouse Stock Transfer Receipt Advice). The receiving warehouse confirms receipt with a 944 that maps back to the 943 transfer ID.
W0401 (Shipment Identification) must match the 944 receipt. Lot number (W0113) is mandatory in pharmaceutical and food & beverage verticals for traceability compliance.