EDI 855: the Purchase Order Acknowledgment

What the 855 is

The EDI 855 — the X12 Purchase Order Acknowledgment — is confirms what you can ship against the PO — quantities, dates, substitutions. It travels outbound for most trading programs.

When it's sent

The 855 sits in the ordering stage of the chain, between the 850 purchase order and the 856 ship notice.

Key segments

Sample 855

A representative 855 interchange — fixed-width ISA envelope, functional group, and control totals:

1ISA*00*          *00*          *ZZ*ACMESUPPLY     *ZZ*RETAILPARTNER  *260101*1200*U*00401*000000001*0*P*>~
2GS*PR*ACMESUPPLY*RETAILPARTNER*20260101*1200*1*X*004010~
3ST*855*0001~
4BAK*00*AC*PO12345*20260101~
5PO1*1*24*EA*9.75**UP*012345678905~
6ACK*IA*24*EA~
7PO1*2*12*EA*14.50**UP*012345678912~
8ACK*IA*12*EA~
9CTT*2~
10SE*8*0001~
11GE*1*1~
12IEA*1*000000001~

Partners that require it

Trading partners in the EDISQ catalog that trade the 855:

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