Costco EDI 860 PO Change Request

Schema Reference

21 segments · X12 860 Purchase Order Change Request

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 Interchange Control Standards Identifier

M ID 1-1

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 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

BCH01 Transaction Set Purpose Code

M ID 2-2

BCH02 Purchase Order Type Code

M ID 2-2

BCH03 Purchase Order Number

M AN 1-22

BCH06 Date

M DT 8-8

REF01 Reference Identification Qualifier

M ID 2-3

REF02 Reference Identification

C AN 1-30

FOB01 Shipment Method of Payment

M ID 2-2

FOB02 Location Qualifier

C ID 1-2

FOB03 Description

O AN 1-80

SAC Loop Repeat: 25

SAC01 Allowance or Charge Indicator

M ID 1-1

SAC02 Service, Promotion, Allowance, or Charge Code

C ID 4-4

SAC05 Amount

O N2 1-15

SAC12 Allowance or Charge Method of Handling Code

O ID 2-2

SAC15 Description

C AN 1-80

ITD01 Terms Type Code

O ID 2-2

ITD02 Terms Basis Date Code

O ID 1-2

ITD03 Terms Discount Percent

O R 1-6

ITD04 Terms Discount Due Date

C DT 8-8

ITD05 Terms Discount Days Due

C N0 1-3

ITD06 Terms Net Due Date

O DT 8-8

ITD07 Terms Net Days

O N0 1-3

ITD12 Description

O AN 1-80

DTM01 Date/Time Qualifier

M ID 3-3

DTM02 Date

C DT 8-8

TD505 Routing

C AN 1-35

N9 Loop Repeat: 1,000

N901 Reference Identification Qualifier

M ID 2-3

N902 Reference Identification

C AN 1-30

MSG01 Free-Form Message Text

M AN 1-264

N1 Loop Repeat: 200

N101 Entity Identifier Code

M ID 2-3

N102 Name

C AN 1-60

N103 Identification Code Qualifier

C ID 1-2

N104 Identification Code

C AN 2-80

N301 Address Information

M AN 1-55

N401 City Name

O AN 2-30

N402 State or Province Code

O ID 2-2

N403 Postal Code

O ID 3-15

PER01 Contact Function Code

M ID 2-2

PER03 Communication Number Qualifier

C ID 2-2

PER04 Communication Number

C AN 1-80

POC Loop Repeat: 1,000

POC01 Assigned Identification

O AN 1-20

POC02 Change or Response Type Code

M ID 2-2

POC04 Quantity Left to Receive

C R 1-9

POC06 Unit Price

C R 1-17

POC08 Product/Service ID Qualifier

C ID 2-2

POC09 Product/Service ID

C AN 1-48

POC10 Product/Service ID Qualifier

C ID 2-2

POC11 Product/Service ID

C AN 1-48

PID Loop Repeat: 1,000

PID01 Item Description Type

M ID 1-1

PID05 Description

C AN 1-80

SAC Loop Repeat: 25

SAC01 Allowance or Charge Indicator

M ID 1-1

SAC02 Service, Promotion, Allowance, or Charge Code

C ID 4-4

SAC05 Amount

O N2 1-15

SAC12 Allowance or Charge Method of Handling Code

O ID 2-2

SAC15 Description

C AN 1-80

CTT Loop Repeat: 1

CTT01 Number of Line Items

M N0 1-6

CTT02 Hash Total

O R 1-10

SE01 Number of Included Segments

M N0 1-10

SE02 Transaction Set Control Number

M AN 4-9

How It Works

Automating Costco EDI 860

Stacksync validates, transforms, and delivers your 860 transactions automatically — so your team can focus on operations, not EDI compliance.

Validate

Transform

Route

Monitor

Stacksync detects incoming 860 PO Changes and updates the original order in your ERP automatically. Changed fields are highlighted and your team is notified — so you can review and confirm without manually comparing documents.

Business unit variations

Costco Wholesale (Canada)

Costco Wholesale Canada

Costco Merchandise Canada - Direct (via IBM)(NEW)

Costco Merchandise Canada - Direct (IBM)(OLD)

Costco Dropship (via Commerce Hub)

Costco Merchandise US - Direct (IBM) - NEW

Costco EDI 860 FAQ

Common questions about 860 Purchase Order Change Request transactions with Costco.

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

Most suppliers are fully connected and processing live Costco 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.

Do I need an existing VAN or AS2 connection to trade with Costco?

No. Stacksync handles the entire EDI transport layer. We connect directly to Costco's trading partner network through our certified connections. You don't need to manage a separate VAN subscription, AS2 certificates, or SFTP configurations.

How does Stacksync help with Costco compliance?

Stacksync improves compliance scores by eliminating manual processing delays. Purchase Orders sync to your system in real time, ASNs are generated automatically when you ship, and invoices are validated with three-way matching before submission. Real-time monitoring alerts you to issues before they become chargebacks.

What EDI document types does Stacksync support for Costco?

Stacksync supports all EDI document types required by Costco — including Purchase Orders (850), Invoices (810), ASNs (856), PO Acknowledgments (855), and more. Our platform handles the full lifecycle from order to payment automatically.

Can I connect Costco EDI to my existing ERP or WMS?

Yes. Stacksync integrates with any system that has a database or API — including SAP, Oracle, NetSuite, Microsoft Dynamics, and custom-built ERPs. Data flows bidirectionally between Costco's EDI network and your system in real time.

What happens when Costco updates their EDI specifications?

Stacksync monitors Costco's EDI spec changes and updates our mappings proactively. When a change affects your integration, we notify you and apply updates — so you stay compliant without scrambling to decode new implementation guides.