**These specifications are a base model. All customers are responsible for ensuring their map or EDI is compliant with their trading partner's most current specifications.
X12 855 [5010] Purchase Order Acknowledgment
X12 Release 5010Revised March 12, 2024
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.
Delimiters
~ Segment
* Element
> Component
^ Repetition
EDI samples
None included
Interchange Control Header
RequiredMax use 1
To start and identify an interchange of zero or more functional groups and interchange-related control segments
Example
ISA*00* *00* *XX*XXXXXXXXXXXXXXX*XX*XXXXXXXXXXXXXXX*241023*0539*^*00501*000000000*X*X*>~
Authorization Information Qualifier
Required
Identifier (ID)
Code identifying the type of information in the Authorization Information
00
No Authorization Information Present (No Meaningful Information in I02)
Authorization Information
Required
String (AN)
Min 10Max 10
Information used for additional identification or authorization of the interchange sender or the data in the interchange; the type of information is set by the Authorization Information Qualifier (I01)
Security Information Qualifier
Required
Identifier (ID)
Code identifying the type of information in the Security Information
00
No Security Information Present (No Meaningful Information in I04)
Security Information
Required
String (AN)
Min 10Max 10
This is used for identifying the security information about the interchange sender or the data in the interchange; the type of information is set by the Security Information Qualifier (I03)
Interchange ID Qualifier
Required
Identifier (ID)
Min 2Max 2
Code indicating the system/method of code structure used to designate the sender or receiver ID element being qualified
Codes
Interchange Sender ID
Required
String (AN)
Min 15Max 15
Identification code published by the sender for other parties to use as the receiver ID to route data to them; the sender always codes this value in the sender ID element
Interchange ID Qualifier
Required
Identifier (ID)
Min 2Max 2
Code indicating the system/method of code structure used to designate the sender or receiver ID element being qualified
Codes
Interchange Receiver ID
Required
String (AN)
Min 15Max 15
Identification code published by the receiver of the data; When sending, it is used by the sender as their sending ID, thus other parties sending to them will use this as a receiving ID to route data to them
Interchange Date
Required
Date (DT)
YYMMDD format
Date of the interchange
Interchange Time
Required
Time (TM)
HHMM format
Time of the interchange
Repetition Separator
Required
String (AN)
Min 1Max 1
Type is not applicable; the repetition separator is a delimiter and not a data element; this field provides the delimiter used to separate repeated occurrences of a simple data element or a composite data structure; this value must be different than the data element separator, component element separator, and the segment terminator
^
Repetition Separator
Interchange Control Version Number
Required
Identifier (ID)
Code specifying the version number of the interchange control segments
00501
Standards Approved for Publication by ASC X12 Procedures Review Board through October 2003
Interchange Control Number
Required
Numeric (N0)
Min 9Max 9
A control number assigned by the interchange sender
Acknowledgment Requested
Required
Identifier (ID)
Min 1Max 1
Code indicating sender's request for an interchange acknowledgment
0
No Interchange Acknowledgment Requested
1
Interchange Acknowledgment Requested (TA1)
Interchange Usage Indicator
Required
Identifier (ID)
Min 1Max 1
Code indicating whether data enclosed by this interchange envelope is test, production or information
I
Information
P
Production Data
T
Test Data
Component Element Separator
Required
String (AN)
Min 1Max 1
Type is not applicable; the component element separator is a delimiter and not a data element; this field provides the delimiter used to separate component data elements within a composite data structure; this value must be different than the data element separator and the segment terminator
>
Component Element Separator
Functional Group Header
RequiredMax use 1
To indicate the beginning of a functional group and to provide control information
Example
GS*PR*XXXXXXX*XXX*20241023*1002*00000*X*005010~
Functional Identifier Code
Required
Identifier (ID)
Code identifying a group of application related transaction sets
PR
Purchase Order Acknowledgment (855)
Application Sender's Code
Required
String (AN)
Min 2Max 15
Code identifying party sending transmission; codes agreed to by trading partners
Application Receiver's Code
Required
String (AN)
Min 2Max 15
Code identifying party receiving transmission; codes agreed to by trading partners
Date
Required
Date (DT)
CCYYMMDD format
Date expressed as CCYYMMDD where CC represents the first two digits of the calendar year
Time
Required
Time (TM)
HHMM, HHMMSS, HHMMSSD, or HHMMSSDD format
Time expressed in 24-hour clock time as follows: HHMM, or HHMMSS, or HHMMSSD, or HHMMSSDD, where H = hours (00-23), M = minutes (00-59), S = integer seconds (00-59) and DD = decimal seconds; decimal seconds are expressed as follows: D = tenths (0-9) and DD = hundredths (00-99)
Group Control Number
Required
Numeric (N0)
Min 1Max 9
Assigned number originated and maintained by the sender
Responsible Agency Code
Required
Identifier (ID)
Min 1Max 2
Code identifying the issuer of the standard; this code is used in conjunction with Data Element 480
T
Transportation Data Coordinating Committee (TDCC)
X
Accredited Standards Committee X12
Version / Release / Industry Identifier Code
Required
String (AN)
Code indicating the version, release, subrelease, and industry identifier of the EDI standard being used, including the GS and GE segments; if code in DE455 in GS segment is X, then in DE 480 positions 1-3 are the version number; positions 4-6 are the release and subrelease, level of the version; and positions 7-12 are the industry or trade association identifiers (optionally assigned by user); if code in DE455 in GS segment is T, then other formats are allowed
005010
Standards Approved for Publication by ASC X12 Procedures Review Board through October 2003
Heading
0100
Transaction Set Header
RequiredMax use 1
To indicate the start of a transaction set and to assign a control number
Example
ST*855*0001~
Transaction Set Identifier Code
Required
Identifier (ID)
Code uniquely identifying a Transaction Set
- The transaction set identifier (ST01) is used by the translation routines of the interchange partners to select the appropriate transaction set definition (e.g., 810 selects the Invoice Transaction Set).
855
Purchase Order Acknowledgment
Transaction Set Control Number
Required
Numeric (N)
Min 4Max 9
Identifying control number that must be unique within the transaction set functional group assigned by the originator for a transaction set
0200
Beginning Segment for Purchase Order Acknowledgment
RequiredMax use 1
To indicate the beginning of the Purchase Order Acknowledgment Transaction Set and transmit identifying numbers and dates
Example
BAK*19*RJ*0123456789*20221101*****20221104~
Transaction Set Purpose Code
Required
Identifier (ID)
Code identifying purpose of transaction set
01
Cancellation
Send when requesting retailer's purchase order cancellation. When sent, Acknowledgment Type Code (BAK02) should contain Rejected - No Detail (RJ) qualifier.
19
Seller initiated change
Send when acknowledging a retailer's purchase order with change. When sent the Acknowledge Type Code (BAK02) should contain either code Acknowledge - With Detail and Change (AC) or Acknowledge - With Exception Detail Only (AE) qualifier.
Acknowledgment Type
Required
Identifier (ID)
Code specifying the type of acknowledgment
AE
Acknowledge - With Exception Detail Only
Sent when acknowledging PO with changes requested, when sent only the changes being requested should be sent. When sent, Transaction Set Purpose Code (BAK01) with Seller initiated change (19) is required by Walmart.
RJ
Rejected - No Detail
When sent, Transaction Set Purpose Code (BAK01) with Cancellation (01) is required by Walmart.
Purchase Order Number
Required
String (AN)
Min 1Max 22
Identifying number for Purchase Order assigned by the orderer/purchaser
Usage notes
This element is required by standard. When sent, this should contain the Walmart Assigned 10-digit PO number as send in the Purchase Order Number (BEG03) on the Purchase Order (X12 850).
Date
Required
Date (DT)
CCYYMMDD format
Date expressed as CCYYMMDD where CC represents the first two digits of the calendar year
- BAK04 is the date assigned by the purchaser to purchase order.
Usage notes
This element is required by standard. When sent, this should contain the original PO date as send in the Date (BEG05) on the Purchase Order (X12 850).
Date
Required
Date (DT)
CCYYMMDD format
Date expressed as CCYYMMDD where CC represents the first two digits of the calendar year
- BAK09 is the date assigned by the sender to the acknowledgment.
Usage notes
This element is required by Walmart. When sent, the element must contain the Supplier Acknowledgment Date.
0500
Reference Information
OptionalMax use >1
To specify identifying information
Example
REF*TD*61~
Reference Identification Qualifier
Required
Identifier (ID)
Code qualifying the Reference Identification
IA
Internal Vendor Number
At least one instance of the Reference Identification (REF) segment with Internal Vendor Number (IA) qualifier is required by Walmart. When sent, the Reference Identification (REF02) element must contain the 9-digit Walmart assigned Supplier/Vendor number with department-sequence.
TD
Reason for Change
One instance of the Reference Information (REF) segment with this qualifier is required by Walmart for all PO header/summary level changes. When sent, a PO Change Reason code from the provided code list must be sent in the Reference Identification (REF02).
Reference Identification
Required
String (AN)
Reference information as defined for a particular Transaction Set or as specified by the Reference Identification Qualifier
42
Weather/Natural Disaster
Only valid when BAK02 = AE/AK/RJ
43
No Product Availability (Supplier)
Only valid when BAK02 = AE/AK/RJ
46
Incorrect Quantity on PO
Only valid when BAK02 = AE/AK/RJ
49
System Issue
Only valid when BAK02 = AE/AK/RJ
50
Compliance Hold/FDA/Recall (Supplier)
Only valid when BAK02 = AK/RJ
51
Item Setup Issue (Supplier)
Only valid when BAK02 = AE/AK/RJ
52
End of Life Items/Seasonal
Only valid when BAK02 = AE/AK/RJ
53
Transportation Issue - Collect
Only valid when BAK02 = AE/AK/RJ
54
Transportation Issue - Prepaid (Supplier)
Only valid when BAK02 = AE/AK/RJ
59
DC/FC Capacity Related (On Time Impact)
Only valid when BAK02 = AE/AK/RJ
61
DC/FC Receipts Remedy (Fill Rate Impact)
Only valid when BAK02 = AE/AK/RJ
62
Incorrect MABD on PO
Only valid when BAK02 = AE/AK/RJ
Detail
PO1 Loop
OptionalMax 100000
Usage notes
When Acknowledgement Type Code (BAK02) with Acknowledge - With Exception Detail Only (AE) qualifier is sent. One and only one of the following change types can be submitter per PO line:
Cancel PO Line (Must include Line-Item Acknowledgment with Item Deleted [ID] qualifier).
All these must include Baseline Item Data (PO1) with Product Identification (DE 234/235). (Note: If more than one change type is required for a PO line and the order of the change request matters, then they must be submitted one at a time an wait for confirmation before sending the next.)
0100
Baseline Item Data
RequiredMax use 1
To specify basic and most frequently used line item data
- PO102 is required.
Example
PO1******UK*XXX*IN*XXXXX*UK*XXXXXX*UK*XXXXXX~
If either Product/Service ID Qualifier (PO1-06) or Product/Service ID (PO1-07) is present, then the other is required
If either Product/Service ID Qualifier (PO1-08) or Product/Service ID (PO1-09) is present, then the other is required
If either Product/Service ID Qualifier (PO1-10) or Product/Service ID (PO1-11) is present, then the other is required
If either Product/Service ID Qualifier (PO1-12) or Product/Service ID (PO1-13) is present, then the other is required
Product/Service ID Qualifier
Optional
Identifier (ID)
Code identifying the type/source of the descriptive number used in Product/Service ID (234)
- PO106 through PO125 provide for ten different product/service IDs per each item. For example: Case, Color, Drawing No., U.P.C. No., ISBN No., Model No., or SKU.
Usage notes
At least one of Buyer's Item Number (IN), GTIN-13 (EN), Item GTIN-14 (UK), and GTIN-12 (UP) is required by Walmart when Acknowledgment Type Code (BAK02) contains Acknowledge - Product Replenishment (AP) qualifier is sent. When any form of GTIN is sent that aligns to multiple Walmart Item Numbers the Prime Item will be used, to avoid this as an opportunity for error Walmart strongly recommends the use of the Walmart assigned Buyer's Item Number (IN).
At least one of PO Line Number (PL), Buyer's Item Number (IN), GTIN-13 (EN), Item GTIN-14 (UK), and GTIN-12 (UP) is required by Walmart when
Acknowledgment Type Code (BAK02) contains Acknowledge - With Exception Detail Only (AE) qualifier is sent. When any form of GTIN is sent that aligns to multiple Walmart Item Numbers the Prime Item will be used, to avoid this as an opportunity for error Walmart strongly recommends the use of the Walmart assigned Buyer's Item Number (IN).
EN
GTIN-13
When sent, the following Product/Service ID (PO1 DE type 234) must contain a valid GTIN-13 consisting of 4-11 digit GS1 company prefix,
followed by a product id long enough that when combined with the GS1 company prefix will combined will consist of 12-digits then followed by a 1-digit check digit.
IN
Buyer's Item Number
When sent, the following Product/Service ID (PO1 DE type 234) must contain a valid and active Walmart assigned 9-digit item number.
UK
GTIN-14
When sent, the following Product/Service ID (PO1 DE type 234) must contain a valid GTIN-14 consisting of a 1-digit logistical unit identifier,
4-11 digit GS1 company prefix, followed by a product id long enough that when combined with the GS1 company prefix will combined will consist of 13-digits then followed by a 1-digit check digit.
UP
GTIN-12
When sent, the following Product/Service ID (PO1 DE type 234) must contain a valid GTIN-12 consisting of 4-10 digit GS1 company prefix,
followed by a product id long enough that when combined with the GS1 company prefix will combined will consist of 11-digits then followed by a 1-digit check digit.
Product/Service ID
Optional
String (AN)
Min 1Max 48
Identifying number for a product or service
Product/Service ID Qualifier
Optional
Identifier (ID)
Code identifying the type/source of the descriptive number used in Product/Service ID (234)
EN
GTIN-13
IN
Buyer's Item Number
UK
GTIN-14
UP
GTIN-12
Product/Service ID
Optional
String (AN)
Min 1Max 48
Identifying number for a product or service
Product/Service ID Qualifier
Optional
Identifier (ID)
Code identifying the type/source of the descriptive number used in Product/Service ID (234)
EN
GTIN-13
IN
Buyer's Item Number
UK
GTIN-14
UP
GTIN-12
Product/Service ID
Optional
String (AN)
Min 1Max 48
Identifying number for a product or service
Product/Service ID Qualifier
Optional
Identifier (ID)
Code identifying the type/source of the descriptive number used in Product/Service ID (234)
EN
GTIN-13
IN
Buyer's Item Number
UK
GTIN-14
UP
GTIN-12
Product/Service ID
Optional
String (AN)
Min 1Max 48
Identifying number for a product or service
1000
Reference Information
OptionalMax use >1
To specify identifying information
Example
REF*TD*46~
Reference Identification Qualifier
Required
Identifier (ID)
Code qualifying the Reference Identification
TD
Reason for Change
When Baseline Item Data (PO1) is sent one instance of the Reference Information (REF) segment with this qualifier is required by Walmart. The following abbreviations will be used to simplify which PO change reasons maybe sent for which PO change types:
New PO line quantity - QTY
Change PO line promotional status - PROMO
New PO line cost - COST
Store or Direct Store Consolidated Distribution change - DISTRO
Add Line item - ADD
Cancel Line - CANCEL
Activate Line - ACTIVATE
Item Comment change - COMMENT
Allowance change - ALLOWANCE
Reference Identification
Required
String (AN)
Reference information as defined for a particular Transaction Set or as specified by the Reference Identification Qualifier
42
Weather/Natural Disaster
QTY-PROMO-COST-DISTRO-ADD-CANCEL-REACTIVATE-
COMMENT-ALLOWANCE
43
No Product Availability (Supplier)
QTY-PROMO-COST-CANCEL-REACTIVATE-DISTRO
46
Incorrect Quantity on PO
QTY-PROMO-COST-DISTRO-ADD-CANCEL-REACTIVATE-COMMENT-ALLOWANCE
49
System Issue
QTY-PROMO-COST-DISTRO-ADD-CANCEL-REACTIVATE-COMMENT-ALLOWANCE
50
Compliance Hold/FDA/Recall (Supplier)
CANCEL-REACTIVATE
51
Item Setup Issue (Supplier)
QTY-PROMO-COST-CANCEL-REACTIVATE-DISTRO
52
End of Life Items/Seasonal
QTY-PROMO-COST-DISTRO-ADD-CANCEL-REACTIVATE-COMMENT-ALLOWANCE
53
Transportation Issue - Collect
QTY-PROMO-COST-DISTRO-ADD-CANCEL-REACTIVATE-COMMENT-ALLOWANCE
54
Transportation Issue - Prepaid (Supplier)
QTY-PROMO-COST-CANCEL-REACTIVATE-DISTRO
59
DC/FC Capacity Related (On Time Impact)
QTY-PROMO-COST-CANCEL-REACTIVATE-DISTRO
61
DC/FC Receipts Remedy (Fill Rate Impact)
QTY-PROMO-COST-CANCEL-REACTIVATE-DISTRO
62
Incorrect MABD on PO
QTY-PROMO-COST-DISTRO-CANCEL-REACTIVATE
ACK Loop
OptionalMax 104
2700
Line Item Acknowledgment
RequiredMax use 1
To acknowledge the ordered quantities and specify the ready date for a specific line item
Example
ACK*ID~
Line Item Status Code
Required
Identifier (ID)
Code specifying the action taken by the seller on a line item requested by the buyer
ID
Item Deleted
When sent, item will be cancelled. (Note: If product is shipped or partially shipped use NOVA to change PO quantity do not use line cancel/delete.)
Summary
0300
Transaction Set Trailer
RequiredMax use 1
To indicate the end of the transaction set and provide the count of the transmitted segments (including the beginning (ST) and ending (SE) segments)
Example
SE*00000000*0001~
Number of Included Segments
Required
Numeric (N0)
Min 1Max 10
Total number of segments included in a transaction set including ST and SE segments
Transaction Set Control Number
Required
Numeric (N)
Min 4Max 9
Identifying control number that must be unique within the transaction set functional group assigned by the originator for a transaction set
Functional Group Trailer
RequiredMax use 1
To indicate the end of a functional group and to provide control information
Example
GE*0*0000000~
Number of Transaction Sets Included
Required
Numeric (N0)
Min 1Max 6
Total number of transaction sets included in the functional group or interchange (transmission) group terminated by the trailer containing this data element
Group Control Number
Required
Numeric (N0)
Min 1Max 9
Assigned number originated and maintained by the sender
Interchange Control Trailer
RequiredMax use 1
To define the end of an interchange of zero or more functional groups and interchange-related control segments
Example
IEA*00000*000000000~
Number of Included Functional Groups
Required
Numeric (N0)
Min 1Max 5
A count of the number of functional groups included in an interchange
Interchange Control Number
Required
Numeric (N0)
Min 9Max 9
A control number assigned by the interchange sender
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