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Error

FX-SCH-A-001015: A line document reference needs one identifier element

In short

Error: fails the selected checks.

FX-SCH-A-001015 means an additional document reference on your invoice line contains no ram:IssuerAssignedID element or more than one. Give each reference exactly one element containing the intended identifier.

On this page

What it means

Each ram:AdditionalReferencedDocument under a line's ram:SpecifiedLineTradeAgreement must contain exactly one ram:IssuerAssignedID. This rule counts elements; it does not check whether the identifier is filled in, correct or unique.

Why it matters

The identifier records which document or object your line references, separately from the reference's type and name.

How to fix it

Find the affected ram:AdditionalReferencedDocument. Add one ram:IssuerAssignedID with the intended identifier if it is missing, or remove duplicates while keeping the correct identifier. If the reference itself is unnecessary, remove the whole reference. Export 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 'ram:IssuerAssignedID' 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-001015 still fails, and which other rules do.

Updated 6 November 2026