EDI 855 - Purchase Order Acknowledgement

The EDI 855 Purchase Order Acknowledgement is a type of electronic data interchange transaction set that is normally sent by a seller to a buyer in response to an EDI 850 Purchase Order.

View the full list of EDI X12 documents and transactions

What is EDI 855?

A EDI 855 Purchase Order Acknowledgement is a type of electronic data interchange transaction set that is normally sent by a seller to a buyer in response to an EDI 850 Purchase Order. included in the confirmation the document will tell the buyer if the purchase order was accepted, rejected or requires changes. EDI 855 is often required by large retailers and distributors and may need to be sent in a specified timeframe or at particular step in your order processing workflow to ensure EDI compliance.  

This electronic document complies with the ANSI X12 EDI specification.

Benefits of the EDI 855

All EDI documents are securely encrypted in transit, allowing trading partners to send sensitive data such as pricing and contact information safely. Sending an EDI 855 eliminates the human interaction to confirm orders with customers by email, fax or phone. Additionally, the automated nature of EDI 855 helps reduce errors associated with manual retyping and the number of customer service touchpoints.

For buyers, an EDI 855 can quickly alert them to any order issues, preventing any later issues with supply, invoicing, and payments.

Reduced Manual Effort

Improve Cash Flow

Eliminate Errors

No delays between your customer accepting or rejecting order

How is an EDI 855 Used?

Using Purchase Order Acknowledgment the seller informs the buyer whether the purchase order was accepted, rejected, or accepted with changes (it means that changes were made to the accepted EDI 850 Order)

It is sometimes mistakenly believed that EDI 997 (Functional Acknowledgment) can replace EDI 855. These two EDI messages should not be confused, as they have completely different functions.

EDI 997 is just a notification that Purchase Order (EDI 850) has been delivered and does not contain any validation to the Order.

EDI 855 PO Acknowledgement Segments

Confirms receipt of a Purchase Order (EDI 850) and replies with:
  • The seller’s intention to fulfill the entire order without changes or the refusal to fulfill the order
  • Informs errors and inaccuracies (for example wrong prices, incorrect product numbers, etc.)
  • Informs about change in the PO such as:

             Delivery date changes 
             Backordered or cancelled quantities 
             Inaccurate product identifiers 
             Price discrepancies 
             Inventory out-of-stocks 
             Discontinued items            

EDI 855 PO Acknowledgement Specifications

The EDI 850 X12 Transaction set is used to initiate an order in an industry-standard specified format.


The American National Standards Institute (ANSI) chartered the Accredited Standards Committee (ASC) X12 to develop uniform standards for inter-industry electronic exchange of business transactions, namely electronic data interchange. ASC X12 also contributes to UN/EDIFACT messages that are used widely outside of the United States.

EDI 855 Purchase Order Acknowledgement Transaction Sample

The example below shows the raw EDI data, which is then translated by your business system (ERP) to begin the fulfillment process.

SA*00* *00* *ZZ*111111111 *01*ABCDEFGHI *150129*2215*U*00401*000122406*0*P*>

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Looking for more? We got you!

We got the goods to help you utilize your EDI services effectively. We encourage you to explore our available resources below

Full List of EDI ANSI X12 Documents and Transactions

Read the full list of EDI x12 Documents and Transactions. PDF version available for download!

The Complete EDI Guide

Dive into this complete guide to all things EDI. From the history to EDI to the costs of doing EDI, this guide covers it all! Dive in

Getting Started with EDI

EDI can make life so much easier for businesses that need to pile through hundreds of pages of reports, invoices and data. Sounds great—but what does your business need to get started with EDI? Find out where to start!