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Error

FX-SCH-A-000539: Add the line period end date's format attribute

In short

Error: fails the selected checks.

FX-SCH-A-000539 means your line period end date is missing its format attribute. Add the attribute to the date's udt:DateTimeString element, using a code that matches the date text and is permitted by your profile.

On this page

What it means

A line period can have a start date (BT-134) and an end date (BT-135). This rule checks whether the end date's udt:DateTimeString, inside ram:BillingSpecifiedPeriod/ram:EndDateTime, has a format attribute. It checks the attribute's presence, not its value or the date text.

Why it matters

The format attribute describes how the date text is written, so software can interpret the line period end date consistently.

How to fix it

Add format to udt:DateTimeString inside the line's ram:BillingSpecifiedPeriod/ram:EndDateTime. For a full date written as YYYYMMDD, set format to 102. If your invoicing software produces the XML, ask its supplier to correct the missing attribute. Export the corrected invoice and check it again.

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

Attribute '@format' is required in this context.

Where this rule applies

Rule set Version
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 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-000539 still fails, and which other rules do.

Updated 6 November 2026