What Gap expects in the 856
Gap trades on X12 4010 over AS2. Beyond the base standard, watch these:
How EDISQ maps it
The certified Gap 856 map loads when you enable the partner — fields auto-map from NetSuite, QuickBooks, Dynamics, and 33 other systems, validation runs against Gap's spec before transmission, and the sandbox replays Gap test scenarios until everything passes.
Common rejection reasons
Nearly all 856 rejections trace to reference data, not syntax: identifiers that don't match Gap's cross-references, echoed fields dropped from the original PO, or timing that misses the program window. EDISQ flags each before Gap ever sees the document.
Sample Gap 856
A representative 856 interchange addressed to Gap — envelope, shipment→order→pack→item hierarchy, and control totals:
1ISA*00* *00* *ZZ*ACMESUPPLY *ZZ*GAP *260101*1200*U*00401*000000001*0*P*>~ 2GS*SH*ACMESUPPLY*GAP*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*GAP 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 Gap use?
X12 4010, delivered over AS2. The certified map tracks Gap's current companion guide.
How do I test a Gap 856?
The sandbox generates realistic Gap 856 scenarios against your live mapping — free, unlimited, invisible to Gap.
What does it cost?
Per document only: first 25/month free, then from $0.50, decreasing with volume. No partner or mapping fees.