What is three-way match?

Retailers compare 850 ordered qty, 856 shipped qty, and 810 invoiced qty — mismatches trigger deductions or rejections.

X12 transaction set reference

X12 810 — Invoice

The X12 810 is an electronic invoice from supplier to buyer, carrying invoice number, dates, PO references, line items, and totals for payment processing.

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EDI 810 facts

GS01 for 810 groups is IN — invoice functional groups are acknowledged separately from PO and ASN groups.
BIG04 purchase order reference is the primary three-way match key linking 810 back to 850 and 856.
SignalEDI flags duplicate invoice numbers and PO/total mismatches in validation before partner send.

Where EDI 810 fits

Direction: Supplier → buyer / retailer
GS functional ID: IN
Workflow position: 810 closes order-to-cash after 850 and 856: invoice BIG04 must reference the original PO; totals must reconcile with shipped quantities.

Related sets: 850, 856, 997 · Document guide

Key segments in EDI 810

Segment	Role
ST	Opens transaction set 810.
BIG	Invoice number, date, and PO reference for three-way match.
N1	Remit-to and ship-to parties.
IT1	Invoiced line quantity, UOM, and price.
TDS	Total invoice amount.
SE	Transaction set trailer.

Sample EDI 810

ST*810*0003~
BIG*20260504*INV7781**PO1001~
N1*ST*DC RECEIVING~
IT1*1*12*EA*19.99**VN*SKU-100~
TDS*23988~
CTT*1~
SE*6*0003~

Validate samples with the free EDI validator.

Send EDI 810 with SignalEDI

POST /api/v1/documents/outbound
{
  "partnerId": "retailer-demo",
  "documentTypeCode": "810",
  "payload": { "invoiceNumber": "INV7781", "purchaseOrderNumber": "PO1001" }
}

Your side can reach partner-ready setup in days, not weeks — partner certification calendars may still take longer. See the API quickstart.

Common EDI 810 errors

BIG04 PO number missing or not on original 850
IT1 invoiced quantity exceeds 856 shipped quantity
TDS total does not sum IT1 lines
Duplicate BIG02 invoice number for same partner

Related reference

FAQ

EDI 810 FAQ

SignalEDI provides QuickBooks-oriented mapping previews and structured invoice outputs for review before accounting writes.

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