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Warning

UBL-CR-219: The buyer's address should not have an in-house mail field

In short

Warning: worth checking.

UBL-CR-219 means the buyer's postal address in your UBL file has an in-house mail element (InhouseMail), which EN 16931 does not use. This is a warning. If you need to keep an internal mail code, put it in an address line, then remove cbc:InhouseMail from the buyer's cac:PostalAddress.

On this page

What it means

The rule warns if cac:AccountingCustomerParty/cac:Party/cac:PostalAddress in a UBL invoice or credit note contains cbc:InhouseMail. In UBL that element identifies a place inside a building for internal mail, such as a mail stop or a pigeonhole. EN 16931 has no separate field for it.

Why it matters

EN 16931 has no separate in-house mail field. You can keep an internal mail code in an address line without using cbc:InhouseMail.

How to fix it

If you need to keep an internal mail code, add it to the second address line (BT-51), at cac:AccountingCustomerParty/cac:Party/cac:PostalAddress/cbc:AdditionalStreetName, preserving any text already there. If the value instead names a person, use the buyer contact point (BT-56). Delete cbc:InhouseMail from the buyer's cac:PostalAddress, export again and recheck the file.

Once the file is corrected, check it again for free: Validate an invoice against EN 16931

Or fix the invoice in a form and download the corrected file, for 1 credit: Fix a rejected e-invoice

The rule as published

A UBL invoice should not include the AccountingCustomerParty Party PostalAddress InhouseMail

Where this rule applies

Rule set Version
EN 16931 (UBL) 1.3.17
EN 16931 (UBL credit note) 1.3.17
XRechnung 3.0 (UBL) 3.0.2
XRechnung 3.0 (UBL credit note) 3.0.2
Peppol BIS Billing 3.0 (invoice) 2026.5
Peppol BIS Billing 3.0 (credit note) 2026.5
SI-UBL 2.0 / NLCIUS (invoice) 2.0.3.13
SI-UBL 2.0 / NLCIUS (credit note) 2.0.3.13
France CTC (UBL invoice) 1.4.0-04
France CTC (UBL credit note) 1.4.0-04
CIUS-RO UBL Invoice 1.0.9 1.0.9
CIUS-RO UBL Credit Note 1.0.9 1.0.9
Rule text from phive-rules 4.6.4.

Check your file

Drop your e-invoice to see whether UBL-CR-219 still fails, and which other rules do.

Updated 6 November 2026