What REI expects in the 856
REI trades on X12 4010 over AS2. Beyond the base standard, watch these:
How EDISQ maps it
The certified REI 856 map loads when you enable the partner — fields auto-map from NetSuite, QuickBooks, Dynamics, and 33 other systems, validation runs against REI's spec before transmission, and the sandbox replays REI test scenarios until everything passes.
Common rejection reasons
Nearly all 856 rejections trace to reference data, not syntax: identifiers that don't match REI's cross-references, echoed fields dropped from the original PO, or timing that misses the program window. EDISQ flags each before REI ever sees the document.
Sample REI 856
A representative 856 interchange addressed to REI — envelope, shipment→order→pack→item hierarchy, and control totals:
1ISA*00* *00* *ZZ*ACMESUPPLY *ZZ*REI *260101*1200*U*00401*000000001*0*P*>~ 2GS*SH*ACMESUPPLY*REI*20260101*1200*1*X*004010~ 3ST*856*0001~ 4BSN*00*SHIP0001*20260101*1200*0001~ 5HL*1**S~ 6TD1*CTN25*3****G*180*LB~ 7TD5*B*2*UPSN*M~ 8REF*BM*BOL000123~ 9DTM*011*20260105~ 10N1*ST*REI DC 5093*92*5093~ 11HL*2*1*O~ 12PRF*PO12345~ 13HL*3*2*P~ 14MAN*GM*00000123450000000017~ 15HL*4*3*I~ 16LIN**UP*012345678905~ 17SN1**24*EA~ 18CTT*4~ 19SE*17*0001~ 20GE*1*1~ 21IEA*1*000000001~
FAQ
Which 856 version does REI use?
X12 4010, delivered over AS2. The certified map tracks REI's current companion guide.
How do I test a REI 856?
The sandbox generates realistic REI 856 scenarios against your live mapping — free, unlimited, invisible to REI.
What does it cost?
Per document only: first 25/month free, then from $0.50, decreasing with volume. No partner or mapping fees.