UBL-SR-53:CompanyID (VAT Identifier) must be stated when providing the PartyTaxScheme/TaxScheme/ID.
Fix: Missing VAT ID with tax scheme. When providing TaxScheme/ID, the CompanyID (VAT identifier) must also be provided.
Missing VAT ID with tax scheme. When providing TaxScheme/ID, the CompanyID (VAT identifier) must also be provided.
Engine Classification
Requires user confirmation before application
What is UBL-SR-53?
UBL-SR-53 is a fatal validation rule defined in the EN16931 specification. It validates the CompanyID element 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:PartyTaxScheme/cbc:CompanyID
Why This Error Matters
Invoice will be rejected by EN16931 validators. These structural rules enforce cardinality and conditional requirements. Fix the duplicate element or provide the required companion element.
UBL-SR-53 is a hard failure — the invoice must be corrected and re-sent before it can reach the recipient.
Validator Behavior
- ·Causes invoice rejection
- ·Fails EN 16931 business rule validation
- ·Error returned: UBL-SR-53
- ·Specification: EN16931
How to Fix It
Find the missing or empty field
Check cbc:CompanyID at //cac:PartyTaxScheme/cbc:CompanyID. This field is required but is either missing or empty.
Set the required value
Missing VAT ID with tax scheme. When providing TaxScheme/ID, the CompanyID (VAT identifier) must also be provided.
Re-validate your invoice
Upload the corrected invoice to confirm UBL-SR-53 is resolved.
XML Example
Generic example based on the rule's target XPath. Your actual XML structure may differ.
<!-- Missing or empty element triggers cbc:CompanyID error --> <cbc:CompanyID></cbc:CompanyID>
<!-- Provide the required value --> <cbc:CompanyID>VALID_VALUE</cbc:CompanyID>
Technical Reference
//cac:PartyTaxScheme/cbc:CompanyIDCommon Causes
- ·TaxScheme ID present but CompanyID missing
- ·cbc:CompanyID required when cac:TaxScheme provided
- ·VAT scheme specified without VAT identifier
- ·PartyTaxScheme structure incomplete
- ·Tax scheme element present but no VAT number
Seeing this in production? The API handles UBL-SR-53 automatically. See the fix response →
Frequently Asked Questions
Missing VAT ID with tax scheme. When providing TaxScheme/ID, the CompanyID (VAT identifier) must also be provided.
Missing VAT ID with tax scheme. When providing TaxScheme/ID, the CompanyID (VAT identifier) must also be provided. You can also use Invoice Navigator's compliance engine to correct this automatically in your pipeline.
Yes, UBL-SR-53 is a critical error that will cause invoice rejection. It must be fixed before submission.
Many instances of UBL-SR-53 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
Validate your invoice
Drop your XML here to check for UBL-SR-53
Fix UBL-SR-53 with one click
Upload your invoice and we'll suggest a fix for your review before applying it.