X12

Outbound

Walmart X12 855 Purchase Order Acknowledgment

All Business Units

The EDI 855 confirms receipt and acceptance of a Walmart Purchase Order. Suppliers must respond promptly indicating whether the order is accepted, rejected, or accepted with changes to maintain compliance standing.

9segments

2loops

5mandatory

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← All Walmart transactions

Schema Reference

9 segments · X12 855 Purchase Order Acknowledgment

ISA01 Authorization Information Qualifier

M ID 2-2

ISA02 Authorization Information

M AN 10-10

ISA03 Security Information Qualifier

M ID 2-2

ISA04 Security Information

M AN 10-10

ISA05 Interchange ID Qualifier

M ID 2-2

ISA06 Interchange Sender ID

M AN 15-15

ISA07 Interchange ID Qualifier

M ID 2-2

ISA08 Interchange Receiver ID

M AN 15-15

ISA09 Interchange Date

M DT 6-6

ISA10 Interchange Time

M TM 4-4

ISA11 Repetition Separator M MIN 1 MAX 1 ID: I65 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 ISA12 Interchange Control Version Number

M ID 5-5

ISA13 Interchange Control Number

M N0 9-9

ISA14 Acknowledgment Requested

M ID 1-1

ISA15 Interchange Usage Indicator

M ID 1-1

GS01 Functional Identifier Code

M ID 2-2

GS02 Application Sender's Code

M AN 2-15

GS03 Application Receiver's Code

M AN 2-15

GS04 Date

M DT 8-8

GS05 Time

M TM 4-8

GS06 Group Control Number

M N0 1-9

GS07 Responsible Agency Code

M ID 1-2

GS08 Version / Release / Industry Identifier Code

M AN 1-12

ST01 Transaction Set Identifier Code

M ID 3-3

ST02 Transaction Set Control Number

M AN 4-9

BAK01 Transaction Set Purpose Code

M ID 2-2

BAK02 Acknowledgment Type

M ID 2-2

BAK03 Purchase Order Number

M AN 1-22

BAK04 Date

M DT 8-8

BAK09 Date

O DT 8-8

REF01 Reference Identification Qualifier

M ID 2-3

REF02 Reference Identification

C AN 1-50

PO1 Loop Repeat: 100,000

PO106 Product/Service ID Qualifier

C ID 2-2

PO107 Product/Service ID

C AN 1-48

PO108 Product/Service ID Qualifier

C ID 2-2

PO109 Product/Service ID

C AN 1-48

PO110 Product/Service ID Qualifier

C ID 2-2

PO111 Product/Service ID

C AN 1-48

PO112 Product/Service ID Qualifier

C ID 2-2

PO113 Product/Service ID

C AN 1-48

REF01 Reference Identification Qualifier

M ID 2-3

REF02 Reference Identification

C AN 1-50

ACK Loop Repeat: 104

ACK01 Line Item Status Code

M ID 2-2

SE01 Number of Included Segments

M N0 1-10

SE02 Transaction Set Control Number

M AN 4-9

How It Works

Automating Walmart EDI 855

Stacksync validates, transforms, and delivers your 855 transactions automatically — so your team can focus on operations, not EDI compliance.

Validate

Transform

Route

Monitor

Stacksync generates and sends 855 Purchase Order Acknowledgments automatically when your system confirms an order. Accept, reject, or modify line items through your ERP — Stacksync handles the EDI formatting and transmission.

Business unit variations

General

Walmart EDI 855 FAQ

Common questions about 855 Purchase Order Acknowledgment transactions with Walmart.

How long does it take to set up Walmart EDI with Stacksync?

Most suppliers are fully connected and processing live Walmart EDI transactions within 3–5 business days. Stacksync's no-code setup means you don't need developers or EDI consultants — configure your field mappings through our visual interface, run a test cycle, and go live.

How long does it take to set up Walmart EDI with Stacksync?

Ready to automate Walmart EDI?