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Operational EDI reference

EDI 850 to 856 Purchase Order and ASN Reconciliation

Compare purchase-order number, item identifiers and shipped quantities before releasing the ASN.

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Direct answer

Direct answer

PO-to-ASN reconciliation reads the 850 purchase-order identity and PO1 lines, then compares them with the 856 PRF reference, LIN identifiers and SN1 quantities. It should flag a different PO number, missing ordered SKU, quantity mismatch and unexpected shipped SKU. This is a source-to-source check that a one-file validator cannot perform.

Why a parser is not enough

The useful unit is not a file that parses; it is a business document with a known decision, an owner, a source trail and a matched downstream response. This page connects the technical structure to that operating workflow.

What the control should check

  1. 01Confirm BEG03 and PRF01 refer to the same purchase order.
  2. 02Normalize item qualifiers before comparing identifiers.
  3. 03Aggregate repeated SKU lines rather than comparing only the first occurrence.
  4. 04Treat missing or quantity-mismatched ordered items as blocking.
  5. 05Treat unexpected ASN items as review until the business rule is confirmed.

Working example

850 PO-77821 / SKU-104 / 12 EA ↔ 856 PO-77821 / SKU-104 / 12 EA

The excerpt is intentionally compact. Use the working validator or authenticated gateway with the complete interchange to obtain a decision.

Failure modes worth catching

  • A transport receipt is mistaken for business acceptance.
  • Control identifiers are regenerated between validation and submission.
  • A warning has no owner and becomes a recurring manual investigation.
  • The document is checked alone even though the truth exists in a purchase order, label or acknowledgement.

Put it into the dispatch workflow

  1. 1Validate the source document before transport.
  2. 2Block deterministic failures and assign every review item.
  3. 3Release with a recorded owner and timestamp.
  4. 4Match functional and application acknowledgements.
  5. 5Reconcile confirmed outcomes back into fixtures and rules.
Use batch validation and acknowledgement tracking

Questions

Implementation answers

Does Shipment Sentry replace my EDI provider?

No. It sits before the existing transport as a validation and evidence sidecar.

What does cleared mean?

The document has no blocking finding in the current rule pack. It is not a guarantee of trading-partner or receiving acceptance.

How are repeat requests kept safe?

The API requires an idempotency key, stores only a token hash, scopes every record to one workspace and rejects reuse with different content.

Sources and limits

Reviewed 2026-07-18. Public references cannot establish every partner-specific rule. Current implementation guides and agreements remain controlling.

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