855 – Purchase Order Acknowledgement

What is an EDI 855?

An EDI 855 Purchase Order Acknowledgement is an EDI transaction set commonly sent by a seller to a buyer in response to an EDI 850 Purchase Order. In addition to acknowledging the receipt of a new order, the document tells the buyer if the purchase order was accepted, required changes, or was denied. 

Specifications and Key Data Elements:

• An EDI 855 document must contain key details as regards to a new order. These include: 
  • Details from the EDI 850 Purchase Order, including the purchase order number and date, product information and approved quantities, and delivery information 
  • The seller’s vendor number
  • Any changes, errors or issues that need to be addressed, such as:
    • Incorrect product identifiers 
    • Price discrepancies 
    • Inventory out-of-stocks 
    • Delivery date changes 
    • Backordered or cancelled quantities 
    • Discontinued items 

M = Mandatory, O = Optional, X = Not Needed

Element	Ref	Description	Req
ST – Transactional Set Header	ST01	Transaction Set Identifier Code	M
	ST02	Transaction Set Control Number	M
BAK – Beginning Segment for Purchase Order Acknowledgement	BAK01	Transaction Set Purpose Code	M
	BAK02	Acknowledgement Type	M
	BAK03	Purchase Order Number	M
	BAK04	Date expressed in YYYMMDD	M
	BAK09	Date expressed in YYYMMDD	M
CUR – Currency	CUR01	Entity Identifier Code	M
	CUR02	Currency Code	M
REF – Reference Information	REF01	Reference Identification Qualifier	M
	REF02	Reference Identification	X
SAC – Service, Promotion, Allowance, or Charge Information	SAC01	Allowance or Charge Indicator	M
	SAC02	Service, Promotion, Allowance, or Charge Code	X
	SAC05	Amount	O
MTX – Text	MTX02	Textual Data	X
N1 – Party Identification	N101	Entity Identifier Code	M
	N102	Name	X
	N103	Identifier Code Qualifier	X
	N104	Identification Code	X
PO1 – Baseline Item Data	PO101	Assigned Identification	O
	PO102	Quantity	X
	PO103	Unit or Basis for Measurement Code	O
	PO104	Unit Price	X
	PO106	Product/Service ID Qualifier	X
	PO107	Product/Service ID	X
	PO108	Product/Service ID Qualifier	X
	P0109	Product/Service ID	X
	PO110	Product/Service ID Qualifier	X
	PO111	Product/Service ID	X
	PO112	Product/Service ID Qualifier	X
	PO113	Product/Service ID	X
PO4 – Item Physical Details	PO405	Weight Qualifier	O
	PO406	Gross Weight per Pack	X
	PO407	Unit or Basis for Measurement Code	X
CTP – Pricing Information	CTP01	Class of Trade Code	O
	CTP02	Price Identifier Code	X
	CTP03	Unit Price	X
PO4 – Item Physical Details	PO405	Weight Qualifier	O
	PO406	Gross Weight Per Pack	X
	PO407	Unit or Basis for Measurement Code	X
ACK – Line Item Acknowledgment	ACK01	Line Item Status Code	M
	ACK02	Quantity	X
	ACK03	Unit or Basis for Measurement Code	X
	ACK04	Date/Time Qualifier	O
	ACK05	Date	X
	ACK06	Request Reference Number	O
DTM – Date/Time Reference	DTM01	Date/Time Qualifier	M
	DTM02	Date	X
CTT – Transaction Totals	CTT01	Number of Line Items	M
	CTT03	Weight	X
	CTT04	Unit or Basis for Measurement Code	X
AMT – Monetary Amount Information	AMT01	Amount Qualifier Code	M
	AMT02	Monetary Amount	M
SE – Transaction Set Trailer	SE01	Number of Included Segments	M
	SE02	Transaction Set Control Number	M