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Error

FX-SCH-A-000421: Use an allowed buyer identifier scheme

In short

Error: fails the selected checks.

FX-SCH-A-000421 means the non-empty scheme code (BT-46-1) on your buyer's global identifier (BT-46) is not allowed by the Basic WL profile. Correct ram:BuyerTradeParty/ram:GlobalID/@schemeID to a listed code that matches the identifier.

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What it means

This Basic WL rule for Factur-X and ZUGFeRD compares a non-empty schemeID with the profile's permitted scheme codes. An empty value does not fail this test; attribute presence is checked separately.

Why it matters

A shared scheme code tells software which numbering system the buyer's identifier uses.

How to fix it

Find the code for the identifier's actual numbering scheme, such as 0088 for a GLN or 0060 for a DUNS number, and check it against the Basic WL list. Write it in ram:BuyerTradeParty/ram:GlobalID/@schemeID, keeping any leading zeroes. Export and recheck your file.

Once the file is corrected, check it again for free: Validate a ZUGFeRD invoice

Or fix the invoice in a form and download the corrected file, for 1 credit: Fix a rejected e-invoice Beta

The rule as published

Value of '@schemeID' is not allowed.

Where this rule applies

Rule set Version
Factur-X 1.09 BASIC WL 1.0.9-2
ZUGFeRD 2.5 BASIC WL 2.5.2
Rule text from phive-rules 4.6.4.

Check your file

Drop your e-invoice to see whether FX-SCH-A-000421 still fails, and which other rules do.

Updated 6 November 2026