warningen16931

BR-65:Buyer item identifier should be unique

Buyer item identification should be unique per line.

Why This Error Matters

Invoice rejected. Classification schemes enable automated categorization and procurement matching.

How to Fix It

1

Review all lines

Check BuyersItemIdentification/ID values

2

Make unique

Ensure no duplicates or remove if not needed

Technical Details

XPath: //cac:InvoiceLine/cac:Item/cac:BuyersItemIdentification/cbc:ID

Common Causes

  • Item classification identifier without scheme identifier
  • CommodityClassification/ItemClassificationCode missing schemeID
  • Product category present but scheme not specified
  • Template missing schemeID on classification code
  • Classification code exported without identifying scheme

Frequently Asked Questions

Buyer item identification should be unique per line.
Ensure each buyer item ID is unique across invoice lines. You can also use Invoice Navigator's automatic Fixer tool to correct this instantly.
BR-65 is a warning that may not always cause rejection, but it indicates a potential compliance issue that should be addressed to ensure full compatibility.
Many instances of BR-65 can be automatically corrected using Invoice Navigator's Fixer tool. Upload your invoice and the tool will identify and fix common issues, including buyer item identifier should be unique.

See Also

EN 16931 Validator

Check your invoice now

Related Errors

BR-64

Item standard identifier needs scheme

Last updated: 16 January 2026

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