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Error

FX-SCH-A-000034: Use at most one seller tax number entry

In short

Error: fails the selected checks.

FX-SCH-A-000034 means more than one seller tax registration block contains a ram:ID with schemeID="FC" for the seller tax number (BT-32). Keep no more than one such registration block on this invoice.

On this page

What it means

Within ram:SellerTradeParty, the test counts ram:SpecifiedTaxRegistration blocks containing at least one ram:ID with schemeID="FC". Zero or one such block passes this test. BT-32 is a national tax number, such as a German Steuernummer, rather than the seller VAT number (BT-31).

Why it matters

The profile allows at most one seller registration block of this kind on the invoice. This is a structural limit, not a check of the seller's tax status or the number's validity.

How to fix it

Check the seller tax number (BT-32) applicable to this invoice. Remove duplicate FC registration blocks, keeping the appropriate ram:SpecifiedTaxRegistration with its ram:ID labelled schemeID="FC" under ram:SellerTradeParty. Keep any VAT number labelled VA distinct from this national tax number. Export again and recheck.

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

Element variant 'ram:SpecifiedTaxRegistration[ram:ID/@schemeID="FC"]' may occur at maximum 1 times.

Where this rule applies

Rule set Version
Factur-X 1.09 MINIMUM 1.0.9-2
Factur-X 1.09 BASIC WL 1.0.9-2
Factur-X 1.09 BASIC 1.0.9-2
Factur-X 1.09 EN 16931 1.0.9-2
Factur-X 1.09 EXTENDED 1.0.9-2
ZUGFeRD 2.5 MINIMUM 2.5.2
ZUGFeRD 2.5 BASIC WL 2.5.2
ZUGFeRD 2.5 BASIC 2.5.2
ZUGFeRD 2.5 EN 16931 2.5.2
ZUGFeRD 2.5 EXTENDED 2.5.2
Rule text from phive-rules 4.6.4.

Check your file

Drop your e-invoice to see whether FX-SCH-A-000034 still fails, and which other rules do.

Updated 6 November 2026