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Error

FX-SCH-A-000820: The delivery contact's telephone needs one number element

In short

Error: fails the selected checks.

FX-SCH-A-000820 means a telephone block for your delivery contact contains no ram:CompleteNumber element or more than one. Put exactly one ram:CompleteNumber in that ram:TelephoneUniversalCommunication block for the contact's telephone number.

On this page

What it means

Each ram:TelephoneUniversalCommunication inside ram:ShipToTradeParty/ram:DefinedTradeContact must contain exactly one ram:CompleteNumber. The rule counts elements; it does not check whether the number text is filled in or correctly formatted.

Why it matters

The EXTENDED profile represents each contact telephone entry with one number element.

How to fix it

Check your delivery contact's telephone number. In ram:ShipToTradeParty/ram:DefinedTradeContact/ram:TelephoneUniversalCommunication, add the missing ram:CompleteNumber with that number or remove extra ram:CompleteNumber elements. 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

Element 'ram:CompleteNumber' 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-000820 still fails, and which other rules do.

Updated 6 November 2026