INVOICE_DUPLICATE_EXTERNAL_REFERENCE
An invoice with this external reference already exists
Category: Invoices
| HTTP status | 409 Conflict |
Rules that cite this code
Example response
When this error occurs, the API answers 409 Conflict with a JSON body of this shape:
{
"type": "https://docs.beel.es/errors/INVOICE_DUPLICATE_EXTERNAL_REFERENCE",
"title": "INVOICE_DUPLICATE_EXTERNAL_REFERENCE",
"detail": "An invoice with this external reference already exists",
"instance": "/v1/<resource>",
"errors": [],
"success": false,
"error": {
"code": "INVOICE_DUPLICATE_EXTERNAL_REFERENCE",
"message": "An invoice with this external reference already exists",
"details": {}
},
"meta": {
"timestamp": "2026-05-21T10:00:00Z",
"request_id": "4bf92f3577b34da6a3ce929d0e0e4736"
}
}The type URI is stable and always resolves to this page.
Message
Send the request with Accept-Language: <es|en|ca> to receive the message in your preferred language.
Other errors in this category
ATTACH_SOURCE_INVOICE_UNAVAILABLE
A source invoice is not available (it does not exist or you no longer have access); uncheck the source invoices attachment to send without the folder
ATTACH_SOURCE_INVOICES_NO_SOURCES
The invoice has no consolidation disbursements: there are no source invoices to attach
ATTACH_SOURCE_INVOICES_REQUIRES_PDF
Attaching the source invoices also requires attaching the invoice PDF
ATTACH_SOURCE_PDF_MISSING
These source invoices have no generated PDF: ‹value›
ATTACH_SOURCE_ZIP_TOO_LARGE
The source invoices ZIP (‹value› MB) exceeds the maximum sendable size (‹value› MB)