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Error

FX-SCH-A-000903: Each invoicer tax registration needs one identifier element

In short

Error: fails the selected checks.

FX-SCH-A-000903 means an invoicer tax registration entry contains no ram:ID element or contains more than one. Add the missing element or remove the extra elements so the entry contains exactly one ram:ID.

On this page

What it means

Each ram:InvoicerTradeParty/ram:SpecifiedTaxRegistration must contain exactly one ram:ID child element. The check counts elements, not numbers: an empty ram:ID still counts as one, and this rule does not check its text or schemeID.

Why it matters

The profile represents each invoicer tax registration with a single identifier element, giving software one defined place to read its number.

How to fix it

In each invoicer tax registration entry, keep one ram:ID containing the correct VAT number or tax number. Remove any extra ram:ID elements. If you supply schemeID, VA denotes a VAT number and FC denotes a tax number. Regenerate 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

Element 'ram:ID' must occur exactly 1 times.

Where this rule applies

Rule set Version
Factur-X 1.09 EXTENDED 1.0.9-2
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-000903 still fails, and which other rules do.

Updated 6 November 2026