ErrorsAll codes
NIF_REPRESENTATION_REQUIRED
You must sign the AEAT representation model before issuing real invoices with this NIF
Category: VeriFactu
Example response
When this error occurs, the API returns a JSON response with the following shape:
{
"type": "https://docs.beel.es/errors/NIF_REPRESENTATION_REQUIRED",
"title": "NIF_REPRESENTATION_REQUIRED",
"detail": "You must sign the AEAT representation model before issuing real invoices with this NIF",
"instance": "/v1/<resource>",
"errors": [],
"success": false,
"error": {
"code": "NIF_REPRESENTATION_REQUIRED",
"message": "You must sign the AEAT representation model before issuing real invoices with this NIF",
"details": {}
},
"meta": {
"timestamp": "2026-05-21T10:00:00Z",
"request_id": "4bf92f3577b34da6a3ce929d0e0e4736"
}
}The type URI is stable and always resolves to this page.
Message
You must sign the AEAT representation model before issuing real invoices with this NIF
Debes firmar el modelo de representación AEAT antes de emitir facturas reales con este NIF
Has de signar el model de representació davant l''AEAT abans d''emetre factures reals amb aquest NIF
Send the request with Accept-Language: <es|en|ca> to receive the message in your preferred language.
Other errors in this category
ALREADY_DISABLED
VeriFactu is already disabled for this user
ALREADY_ENABLED
VeriFactu is already enabled for this user
ALREADY_REGISTERED
The NIF is already registered in VeriFactu
API_COMMUNICATION_ERROR
Error communicating with the VeriFactu API
API_KEY_NOT_CONFIGURED
The VeriFactu API key has not been configured