To start and identify an interchange of zero or more functional groups and interchange-related control segments
Costco X12 860 Purchase Order Change Request - Buyer Initiated
X12 860 (Purchase Order Change Request - Buyer Initiated) is the EDI transaction exchanged between Costco (Costco Merchandise Canada - Direct (IBM)(OLD)) and its trading partners. Stacksync handles full compliance, mapping, and real-time delivery.
- Segments
- 20
- Loops
- 6
- X12 860
- All partners ↗
Transaction context
Where 860 Purchase Order Change Request - Buyer Initiated fits on Costco Merchandise Canada - Direct (IBM)(OLD)
- Costco channels
- 7 of 12
- Trading partners
- 140
- Channels
- 171
7 of Costco's 12 channels carry 860
partners across the Stacksync network trade 860
channels network-wide carry 860
Most common alongside 860
This is the X12 860, formally titled Purchase Order Change Request - Buyer Initiated. It lets a buyer amend a purchase order already in the supplier's hands: quantity adjustments, price corrections, rescheduled delivery dates, added or removed line items, or full cancellation, and it can confirm acceptance of seller-proposed changes. Trading partners require it so the order of record stays identical on both sides and invoices reconcile against the amended order rather than the original. Always sent by the buyer to the supplier, referencing the original 850; the supplier accepts or contests the change with an 865 Purchase Order Change Acknowledgment.
When it fires: A buyer needs to change quantities, pricing, dates, or line items on an open order, or cancel it outright, at any point in the order cycle including after partial shipment.
Common 860 rejection causes
- PO number or POC line-item references that do not match the original 850, so the supplier's system rejects or misapplies the change.
- Changes arriving after picking or shipment has begun, which the supplier can no longer execute, leaving quantity and date mismatches downstream.
- Missing or late 865 acknowledgment, so neither side can prove the amended terms were agreed before the goods shipped.
- Post-shipment price corrections sent by retailers via 860 that the supplier fails to apply before invoicing, causing invoice rejections.
Specification summary
X12 860 Purchase Order Change Request - Buyer Initiated at the element level
The X12 860 specification defines 55 segments carrying 162 data elements, 62 of which are mandatory.
- Segments
- 55
- Data elements
- 162
- Mandatory elements
- 62
| Segment | Elements | Mandatory |
|---|---|---|
| BCH | 4 | 4 |
| CUR | 2 | 2 |
| REF | 3 | 1 |
| PER | 2 | 1 |
| FOB | 5 | 1 |
| N9 | 2 | 1 |
| N1 | 4 | 1 |
| N2 | 1 | 1 |
| N3 | 2 | 1 |
| POC | 13 | 1 |
Key identifiers in 860
- Transaction Set Purpose Code
- Purchase Order Type Code
- Purchase Order Number
- Date
- Entity Identifier Code
- Currency Code
- Reference Identification Qualifier
- Contact Function Code
Full segment guideline — 20 segments 6 loops · X12 860 Purchase Order Change Request - Buyer Initiated
To indicate the beginning of a functional group and to provide control information
To indicate the start of a transaction set and to assign a control number
To indicate the beginning of the Purchase Order Change Transaction Set and transmit identifying numbers and dates
To specify identifying information
To specify transportation instructions relating to shipment
SAC Loop Repeat: 25
To request or identify a service, promotion, allowance, or charge; to specify the amount or percentage for the service, promotion, allowance, or charge
To specify terms of sale
To specify pertinent dates and times
To specify the carrier and sequence of routing and provide transit time information
N9 Loop Repeat: 1,000
To transmit identifying information as specified by the Reference Identification Qualifier
To provide a free-form format that allows the transmission of text information
N1 Loop Repeat: 200
To identify a party by type of organization, name, and code
To specify the location of the named party
To specify the geographic place of the named party
To identify a person or office to whom administrative communications should be directed
POC Loop Repeat: 1,000
To specify changes to a line item
PID Loop Repeat: 1,000
To describe a product or process in coded or free-form format
CTT Loop Repeat: 1
To transmit a hash total for a specific element in the transaction set
To indicate the end of the transaction set and provide the count of the transmitted segments (including the beginning (ST) and ending (SE) segments)
Trading partners
6+ trading partners.
And every channel covered.
We connect to every major retailer, distributor, and 3PL on the EDI network. Type to search the directory, or browse the full catalogue.
Trading partners
5+ trading partners.
And every channel covered.
We connect to every major retailer, distributor, and 3PL on the EDI network. Type to search the directory, or browse the full catalogue.
PU Purchase Order SH Ship Notice Manifest IN Invoice PA Payment Order Remittance Advice AP Application Advice
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Browse the full directory
Costco Costco Merchandise Canada - Direct (IBM)(OLD) EDI 860 FAQ
Common questions about 860 Purchase Order Change Request - Buyer Initiated on the Costco Merchandise Canada - Direct (IBM)(OLD) channel.
What is X12 860 Purchase Order Change Request - Buyer Initiated?
X12 860 (Purchase Order Change Request - Buyer Initiated) is the EDI transaction set used to exchange purchase order change request - buyer initiated data. Costco's Costco Merchandise Canada - Direct (IBM)(OLD) channel requires it from trading partners.
Does Costco Costco Merchandise Canada - Direct (IBM)(OLD) require 860 for trading partners?
Yes, Costco (Costco Merchandise Canada - Direct (IBM)(OLD)) supports X12 860 Purchase Order Change Request - Buyer Initiated. Stacksync handles the full integration so your team can focus on operations.
How fast can I integrate Costco 860 with Stacksync?
Most companies go live with Costco 860 on Stacksync in days. Pre-built mappings, no-code setup, and real-time monitoring make EDI compliance straightforward.
Which other Costco channels accept 860?
X12 860 runs on 7 of Costco's 12 channels. Besides Costco Merchandise Canada - Direct (IBM)(OLD), it is accepted on Costco Wholesale (Canada), Costco Merchandise US - Direct (IBM) - NEW, Costco Wholesale Canada, Costco Merchandise Canada - Direct (via IBM)(NEW), Costco Dropship (via Commerce Hub), Costco Wholesale - US. Each channel carries its own implementation guideline; Stacksync validates outbound documents against the correct guideline automatically.
Ready to automate your Costco EDI?
Most teams go live in days, not months. Talk to our team and we'll walk you through your specific setup.
