EDI 855 Purchase Order Acknowledgment

The X12 855 transaction set is a Purchase Order Acknowledgement. It is used by sellers to confirm the receipt of a purchase order (an EDI 850 transaction) from a buyer, eliminating the need to call or fax a confirmation. The 855 also communicates whether the PO was accepted or rejected, or what changes may have been made to accepted orders by the seller. Thus, like many acknowledgement transactions, the 855 can indicate that the order was accepted, rejected or accepted with changes, as follows:
  • Accepted
  • Rejected
  • Accepted with Changes
    • All line items accepted, change freight or cash terms (i.e., header level changes only)
    • Change or reject one or more line items, no header-level changes
    • Header-level changes, and one or more line items changed or rejected
Each of these may be provided with or without an indication of the product availability. The 855 transaction may also be used to advise a buyer of a pre-arranged merchandise shipment directly from a vendor. The seller will typically transmit an 810 Invoice once the product ships. In some cases, an 856 Advance Shipping Notice (ASN) must be provided ahead of the shipment. 1EDISource has extensive experience managing EDI operations for retailers, manufacturers and their suppliers. Our EDI Outsourcing Services provide fully hosted solutions, including the hardware, software, staffing, security and more, all managed by our staff of EDI experts.

EDI 855 Format

ISA*01*0000000000*01*0000000000*ZZ*ABCDEFGHIJKLMNO*ZZ*123456789012345*101127*1719*U*00400*000003438*0*P*> GS*PR*4405197800*999999999*20110527*1719*1421*X*004010VICS ST*855*1001 BAK*00*AC*ABC123*20000430*****20000430 DTM*067*20000507 N1*ST**21*HO1000A00 PO1*1*10*CA*72.95*CT*UK*50387698433528 ACK*IA*10*CA*067*20000507**UK*50387698433528 PO1*2*25*BX*15.75*CT*UK*30387698775411 ACK*IA*25*BX*067*20000507**UK*30387698775411 CTT*2 SE*10*1001 GE*1*1421 IEA*1*000004438

EDI 855 Specification

This X12 Transaction Set contains the format and establishes the data contents of the Purchase Order Acknowledgment Transaction Set (855) for use within the context of an Electronic Data Interchange (EDI) environment. The transaction set can be used to provide for customary and established business and industry practice relative to a seller's acknowledgment of a buyer's purchase order. This transaction set can also be used as notification of a vendor generated order. This usage advises a buyer that a vendor has or will ship merchandise as prearranged in their partnership.


Accredited Standards Committee X12. ASC X12 Standard [Table Data]. Data Interchange Standards Association, Inc., Falls Church, VA. http://www.x12.org