EXEMPT_ZERO_RATE_REQUIRES_REASON
Lines with 0% tax rate must declare an exemption reason. Use one of: EXENTA_ART_20..26, NO_SUJETA_ART_7_9, NO_SUJETA_LOCALIZACION, ISP_ART_84_2_*, OTRO
Category: Invoices
Example response
When this error occurs, the API returns a JSON response with the following shape:
{
"type": "https://docs.beel.es/errors/EXEMPT_ZERO_RATE_REQUIRES_REASON",
"title": "EXEMPT_ZERO_RATE_REQUIRES_REASON",
"detail": "Lines with 0% tax rate must declare an exemption reason. Use one of: EXENTA_ART_20..26, NO_SUJETA_ART_7_9, NO_SUJETA_LOCALIZACION, ISP_ART_84_2_*, OTRO",
"instance": "/v1/<resource>",
"errors": [],
"success": false,
"error": {
"code": "EXEMPT_ZERO_RATE_REQUIRES_REASON",
"message": "Lines with 0% tax rate must declare an exemption reason. Use one of: EXENTA_ART_20..26, NO_SUJETA_ART_7_9, NO_SUJETA_LOCALIZACION, ISP_ART_84_2_*, OTRO",
"details": {}
},
"meta": {
"timestamp": "2026-05-21T10:00:00Z",
"request_id": "4bf92f3577b34da6a3ce929d0e0e4736"
}
}The type URI is stable and always resolves to this page.
Message
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Other errors in this category
BULK_PDF_ERROR
Error processing bulk PDF download
CANCELLATION_VIA_SPECIFIC_ENDPOINT
To cancel an invoice use the specific cancellation endpoint
CANNOT_DUPLICATE_DELETED_INVOICE
Cannot duplicate a deleted invoice
CLIENT_NOT_FOUND
Customer not found: {0}
DELETION_FAILED
Error deleting the invoice
Keep exploring
ENCODING_ERROR
File encoding error: {0}
EXEMPTION_REGIME_NOT_SUPPORTED_IN_VERIFACTU
The given exemption reason corresponds to a special regime (REAEA, equivalence surcharge, cash basis, investment gold…), not to an art. 20-26 LIVA exemption. VeriFactu models it with clave_regimen, not operacion_exenta. Switch to the appropriate clave_regimen.