DE-R-009:The element "Buyer post code" (BT-53) shall be provided.
Fix: This requires user input to resolve. Provide the correct value for `cbc:PostalZone` (BT-53). Provide the required value in the free validator.
Buyer postal code is missing. German invoices must include the buyer's postal code (BT-53).
Engine Classification
Business data required · Explicit input workflow · No assumptions made
Required input: IBAN
What is DE-R-009?
DE-R-009 is a fatal validation rule defined in the EN 16931 specification (DEU national rules). It validates the ID element under PayeeFinancialAccount in the UBL invoice XML.
When this rule fires, the invoice is rejected by Peppol access points and never reaches the buyer.
Target path: //cac:PaymentMeans/cac:PayeeFinancialAccount/cbc:ID
Why This Error Matters
Invoice will be rejected by German XRechnung validators. Germany has additional mandatory fields beyond EN16931 baseline, including seller contact details, complete addresses, and buyer reference (Leitweg-ID).
DE-R-009 is a hard failure — the invoice must be corrected and re-sent before it can reach the recipient.
Validator Behavior
- ·Causes invoice rejection
- ·Rejected by XRechnung endpoints
- ·Error returned: DE-R-009
- ·Specification: EN 16931
How to Fix It
Locate the field
Check cbc:ID at //cac:PaymentMeans/cac:PayeeFinancialAccount/cbc:ID. The current value does not meet the rule requirements for DE-R-009.
Set the correct value
This requires user input to resolve. Provide the correct value for `cbc:PostalZone` (BT-53).
Re-validate your invoice
Upload the corrected invoice to confirm DE-R-009 is resolved.
Before / After
<cac:PostalAddress> <cbc:PostalZone>INVALID_CODE</cbc:PostalZone> </cac:PostalAddress>
<cac:PostalAddress> <cbc:PostalZone>VALID_CODE</cbc:PostalZone> </cac:PostalAddress>
Technical Reference
//cac:PaymentMeans/cac:PayeeFinancialAccount/cbc:IDCommon Causes
- ·German invoice missing buyer post code
- ·BT-53 Buyer post code element empty or absent
- ·cbc:PostalZone in buyer address not provided
- ·Buyer postal address incomplete for XRechnung
- ·German validation requires buyer postal code
Seeing this in production? The API handles DE-R-009 automatically. See the fix response →
Frequently Asked Questions
Buyer postal code is missing. German invoices must include the buyer's postal code (BT-53).
This requires user input to resolve. Provide the correct value for `cbc:PostalZone` (BT-53). You can also use Invoice Navigator's compliance engine to correct this automatically in your pipeline.
Yes, DE-R-009 is a critical error that will cause invoice rejection. It must be fixed before submission.
Many instances of DE-R-009 can be automatically corrected using Invoice Navigator's compliance engine. The fix is applied in your pipeline with full audit evidence.
Related Content
Last updated: 14 April 2026
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