ES-01:Spanish sellers should include NIF/CIF
Fix: Review your Invoice XML structure and correct the issue described by this rule. Check relevant cbc: and cac: elements per CIUS-ES (Spain).
Spanish sellers should include NIF/CIF. This validation rule ensures Invoice compliance with CIUS-ES (Spain).
Engine Classification
Financial or legal field · Modification blocked by policy
What is ES-01?
ES-01 is a warning validation rule defined in the CIUS-ES (Spain) specification (ESP national rules).
The invoice may pass transmission, but this non-compliance can cause problems during tax audits or buyer-side processing.
Why This Error Matters
Spanish e-invoicing regulations require this for legal compliance. Invoices missing this information may be rejected by Spanish government portals and business partners.
ES-01 is a soft failure that can cause issues at the receiving end — tax audits, ERP processing, or VAT reconciliation mismatches.
Validator Behavior
- ·Generates validation warning
- ·Error returned: ES-01
- ·Specification: CIUS-ES (Spain)
How to Fix It
Identify the issue in your invoice
Spanish sellers should include NIF/CIF. This validation rule ensures Invoice compliance with CIUS-ES (Spain).
Correct this in your invoicing software
Review your Invoice XML structure and correct the issue described by this rule. Check relevant cbc: and cac: elements per CIUS-ES (Spain).
Re-export and validate
Generate a new invoice export from your accounting system and re-validate to confirm ES-01 is resolved.
Before / After
<Invoice> <!-- Issue: Spanish sellers should include NIF/CIF --> </Invoice>
<Invoice> <!-- Issue resolved per CIUS-ES (Spain) --> </Invoice>
Technical Reference
Seeing this in production? The API handles ES-01 automatically. See the fix response →
Frequently Asked Questions
Spanish sellers should include NIF/CIF. This validation rule ensures Invoice compliance with CIUS-ES (Spain).
Review your Invoice XML structure and correct the issue described by this rule. Check relevant cbc: and cac: elements per CIUS-ES (Spain). You can also use Invoice Navigator's compliance engine to correct this automatically in your pipeline.
ES-01 is a warning that may not always cause rejection, but indicates a compliance issue.
Many instances of ES-01 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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